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1. Measurement of the proton structure function F2 and σ at low and very low x at HERA

Author: Michele Arneodo, Ada Solano, S. Limentani, G. F. Susinno, M. St-Laurent, L. Suszycki, I. T. Lim, S. Bhadra, A. M. Cooper-Sarkar, S. Dagan, C. A. Heusch, Marco Schioppa, S. Magill, M. Khakzad, N.C. Brummer, Yu. A. Golubkov, E. Paul, P. G. Pelfer, A. Meyer-Larsen, S. Nam, T. Ishii, Costas Foudas, M. Posocco, J. Hartmann, E. Lohrmann, A. Bertolin, R. S. Orr, C. Voci, J. F. de Trocóniz, C. M. Ginsburg, R. Ayad, H.E. Blaikley, Mariusz Przybycien, M. Corradi, Kenneth Long, S. Ritz, L.W. Mo, H. Zhang, J. F. Martin, A. Caldwell, L. Zawiejski, Roberto Cirio, C.H. Bokel, J.A. Parsons, Y. Zamora Garcia, T. Voß, S. Polenz, F. Selonke, M. Zachara, E. Hilger, H.J. Grabosch, W.N. Cottingham, G. Bari, B. Lu, G. Cara Romeo, A. Meyer, J. Repond, H. F.W. Sadrozinski, K. Umemori, D.S. Hanna, Rosario Nania, Sung Keun Park, O. Deppe, R.C.E. Devenish, Q. Zhu, Giovanna Bruni, B. Bednarek, G. Laurenti, K. Coböken, A. Kotański, H.-P. Jakob, R. L. Saunders, U. Wollmer, L.K. Gladilin, A. Quadt, C. Coldewey, L. Lamberti, D. Simmons, L.A.T. Bauerdick, Marcel Vreeswijk, J.R. Okrasiński, Matthias Kasemann, D.G. Roff, F. Zetsche, M. L. Utley, Yuji Yamazaki, F. Pelucchi, A. Stifutkin, B. Mellado, James Crittenden, F. Dal Corso, Giuseppe Levi, R. Brugnera, John Hart, B. Surrow, Jongmin Lee, D. Kçira, L. Iannotti, R. Kerger, K. Jelen, R.L. Talaga, T. Yamashita, W.F. Badgett, W.R. Frisken, V. A. Kuzmin, D. C. Bailey, M. Grothe, L. Heinz, J. P. Fernandez, Ian Brock, H.F. Heath, L. Lindemann, J. Ciborowski, J. Del Peso, Giuseppe Barbagli, H. Salehi, D. Notz, J. A. Zakrzewski, S. Sampson, U. Schneekloth, J. Bulmahn, Katsuo Tokushuku, T. W. Jones, O. Ruske, M. Dardo, I. Butterworth, Y. Iga, M. Brkic, Gm Levman, Umberto Dosselli, M. Roco, O. Yu. Lukina, D. Epperson, A. Prinias, B.Y. Oh, Janusz Chwastowski, P. Nylander, K. K. Joo, S. Yamada, R. Yoshida, A. Polini, Elisabetta Gallo, D. S. Waters, K. Homma, D. Hasell, G. D'Agostini, B.D. Burow, Richard Hall-Wilton, J. Stamm, B. Foster, E. Strickland, M. Nakao, T. Y. Ling, Ta Romanowski, E. A. De Wolf, I. A. Korzhavina, J. R. Tickner, G. L. Bashindzhagyan, W.B. Schmidke, R. J. Teuscher, K. Yamauchi, W. Koch, O. Mańczak, P. Markun, G. F. Hartner, H. Beier, T.P. Shah, Tachishige Hirose, C. Amelung, Robert Klanner, A. Vaiciulis, U. Holm, S. Mattingly, R. Cross, M.E. Hayes, O. Schwarzer, J. Gilmore, Silvia Maselli, L.W. Hung, R. Stanek, J. M. Pawlak, Jonathan Butterworth, Tadeusz Kowalski, G. Poelz, A. Nigro, S. Eisenhardt, N. Tuning, Joanne Cole, S. A. Zotkin, J. Y. Kim, R. Pawlak, A. Garfagnini, W. Schott, Cd Catterall, U. Fricke, Fernando Barreiro, B. Löhr, Lucia Votano, Z. Duliński, C. Nath, J.D. McFall, C. L. Kim, T. Matsushita, I. Suzuki, K. Muchorowski, R. Waugh, G. Cases, Y. Eisenberg, S. Kitamura, A.F. Whitfield, M.C.K. Mattingly, L. S. Durkin, Mark Sutton, S. M. Wang, D. H. Saxon, R. Stroili, D.J. Gilkinson, Guillaume Garcia, R. Walczak, K. Heinloth, Pietro Antonioli, Luisa Cifarelli, Neville Harnew, Roberto Carlin, P. Göttlicher, J.N. Lim, G. Howell, R. Wedemeyer, J.K. Edmonds, D. Horstmann, D. Chapin, A.I. van Sighem, P.F. Ermolov, H. Wieber, J. Roldán, N. H. Brook, R. Hamatsu, V. L. Harris, K. Wick, Mauro Morandin, Z. Jakubowski, J. Puga, G. Sartorelli, M. Przybycien, K. Nagano, C. Youngman, M. Rohde, Luca Stanco, Lev Khein, R. Deffner, A.A. Savin, Krzysztof Piotrzkowski, J.T. Bromley, C. Rembser, M. Adamus, Danuta Kisielewska, G. Marini, T. Massam, E. Rulikowska-Zarȩbska, C. Glasman, Wolfram Dietrich Zeuner, A.K. Wróblewski, A. Bamberger, G. Abbiendi, K. Desler, D. Acosta, Roberto Sacchi, M. Riveline, S. Kananov, J. K. Sedgbeer, D. Piccioni, P. Cloth, Cristiana Peroni, M. Kuze, R. J. Cashmore, J. Labs, M. Derrick, T. Tymieniecka, A. H. Walenta, N. A. McCubbin, U. Kötz, D.D. Reeder, D. Revel, M. Wodarczyk, D. Sideris, N. Gendner, F. Sciulli, J. Breitweg, F. Ricci, D. B. Miller, C.-P. Fagerstroem, Antonino Zichichi, J.J. Engelen, M. Basile, R. J. Nowak, Aharon Levy, A. Pellegrino, T. Haas, F. Anselmo, A. Pesci, A. N. Solomin, U. Mallik, Ben Bylsma, J. Milewski, Kurtis F Johnson, J. M. Hernandez, G.P. Heath, A. Bornheim, H. Park, H. Hartmann, J. Große-Knetter, P. Giusti, W. Liu, Laurel E. Sinclair, R.J. Tapper, Sridhara Dasu, S Campbell-Robson, Halina Abramowicz, F. Palmonari, P. B. Kaziewicz, K. Ohrenberg, H. Uijterwaal, V. Monaco, G. Drews, Giovanni Maccarrone, D. Hochman, W. Hain, S. Schlenstedt, P. J. Bussey, Thomas Trefzger, H.G.J.M. Tiecke, A. Seiden, T. Doeker, J.J. Ryan, W. H. Smith, Andrea Contin, Anselmo Margotti, J.H. Vossebeld, M. Lancaster, M. Raso, A. Eskreys, A. T. Doyle, L. Labarga, Wouter Verkerke, D. C. Williams, Mário Costa, B. A. Dolgoshein, T. Monteiro, L.W. Wiggers, J.T. Wu, A. Ochs, M. Inuzuka, Marcella Capua, F.S. Chlebana, D.S. Bailey, D. Westphal, J.I. Fleck, M. Eckert, N.A. Korotkova, L. Bellagamba, J. Zaja̧c, J.B. Lane, Gy. Wolf, J. T. Rahn, U. Karshon, Luis Hervas, D. Boscherini, A.S. Proskuryakov, A.F. Żarnecki, G. Briskin, G. Castellini, W.N. Murray, Detlef Filges, N. Pavel, M.A.J. Botje, N. Cartiglia, J.S.T. Ng, P.M. Kooijman, J. Shulman, Ricardo Graciani, Juan Terron, M. Kasprzak, P. Borzemski, S. Wölfle, Amedeo Staiano, U. F. Katz, R. Loveless, T. Fusayasu, M. Pfeiffer, A.S. Wilson, C.R. Sampson, Ulf Behrens, Federico Cindolo, H. Kowalski, R. Ullmann, V.A. Noyes, Miriam Lucio Martinez, S. B. Lee, B. Musgrave, D.G. Stairs, S.H. An, M. Y. Pac, M. C. Petrucci, T. Tsurugai, P.B. Straub, L. M. Shcheglova, Giuseppe Iacobucci, I. Bohnet, Tomohiro Abe, Z. Jing, B. H. Y. Hung, J. K. Bienlein, A. Bruni, M. Löwe, Enrico Tassi, J. J. Whitmore, Vladimir Bashkirov, F. Corriveau, G. Grzelak, T. C. Bacon, S. De Pasquale, I. Gialas, Inkyu Park, Leszek Adamczyk, M.I. Ferrero, D. Mikunas, R. G. Feild, and D. Krakauer
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), ZEUS (particle detector), Neutral current, Proton, 010308 nuclear & particles physics, Scattering, Structure function, HERA, 01 natural sciences, Calorimeter, Nuclear physics, 0103 physical sciences, 010306 general physics
Abstract: A small electromagnetic sampling calorimeter, installed in the ZEUS experiment in 1995, significantly enhanced the acceptance for very low x and low Q 2 inelastic neutral current scattering, e+p → e+X, at HERA. A measurement of the proton structure function F2 and the total virtual photon-proton ( γ ∗ p ) cross-section is presented for 0.11 ≤ Q 2 ≤ 0.65 GeV2 and 2 × 10−6 ≤ x ≤ 6 × 10−5, corresponding to a range in the γ ∗ p c.m. energy of 100 ≤ W ≤ 230 GeV. Comparisons with various models are also presented.
Published: 1997

2. Study of charged—currentep interactions atQ 2>200 GeV2 with the ZEUS detector at HERA

Author: WN Cottingham, D.D. Reeder, M. Wodarczyk, H. Park, P. B. Kaziewicz, H. Uijterwaal, U. Wollmer, Roberto Sacchi, Ulf Behrens, H.G.J.M. Tiecke, B. Surrow, F. Benard, M.A.J. Botje, Fernando Barreiro, S. Mengel, J. Mainusch, J.B. Lane, Gy. Wolf, Yasunori Yamazaki, D. Simmons, Avto Kharchilava, W. Schott, Cd Catterall, Federico Cindolo, R. R. McNeil, W. Bogusz, Cristiana Peroni, Aharon Levy, Thomas Trefzger, K.F. Johnson, J. N. Lim, Mauro Morandin, Z. Jakubowski, Ricardo Graciani, Samuel Silverstein, H.-P. Jakob, John Hart, P. Nylander, K. K. Joo, A. Bruni, L. W. Hung, F. Palmonari, R. Sinkus, O. Mańczak, G. F. Hartner, R. J. Cashmore, Miriam Lucio Martinez, S. B. Lee, Andrea Contin, A. Kruse, S. Wölfle, Laurel E. Sinclair, M. Löwe, Katsuo Tokushuku, L. Hagge, Antonino Zichichi, Aleksander Filip Żarnecki, Silvia Maselli, R. Cross, M. Derrick, T. Tymieniecka, U. Kötz, R. L. Saunders, M. de Kamps, H. J. Kim, Giovanni Maccarrone, D. Hochman, C. Rembser, T. Ishii, F. J. Sciulli, T. Monteiro, S. Polenz, S. Schlenstedt, Amedeo Staiano, U. F. Katz, M. Pfeiffer, D. Filges, R. J. Tapper, D. Revel, Z. Duliński, J. Gilmore, Lucia Votano, Enrico Tassi, J. J. Whitmore, Giancarlo Susinno, Masami Chiba, R. Brugnera, S.H. An, P. J. Bussey, N. A. McCubbin, Marcella Capua, A. Meyer, K. Umemori, Mariusz Przybycien, D. Horstmann, N. H. Brook, V. L. Harris, V. K. Nadendla, M. Corradi, C. Nath, S. Yang, H. Heßling, J. F. Martin, I. Gialas, R. J. Nowak, F. Selonke, E. Hilger, Matthias Kasemann, V. A. Kuzmin, S. Campbell-Robson, H.J. Grabosch, J. P. Fernandez, Umberto Dosselli, Rosario Nania, Sung Keun Park, Cg Matthews, M. Roco, M. Rohde, Danuta Kisielewska, Marcel Vreeswijk, D Piccioni, N. Cartiglia, T. Tsurugai, O. Deppe, W. N. Murray, D. C. Bailey, J. Del Peso, M. De Giorgi, C. Youngman, A. M. Cooper-Sarkar, S. Dagan, D. Notz, G. Cases, A. Nigro, T. Massam, A.S. Proskuryakov, T. Yip, M. Inuzuka, R. van Woudenberg, A. Seiden, R. Stanek, W. Liu, K. Desler, R. J. Seifert, Leszek Adamczyk, I. A. Korzhavina, M. Khakzad, Janusz Chwastowski, M. L. Cardy, K. Homma, James Crittenden, Yu. A. Golubkov, M. Krzyżanowski, J. Ciborowski, M.I. Ferrero, M. St-Laurent, C. Coldewey, D.C. Williams, B. D. Burow, R. Loveless, ME Hayes, Luca Stanco, J.H. Vossebeld, E. Barberis, C.-P. Fagerstroem, A. Eskreys, A. T. Doyle, Y. Zamora Garcia, T. Voß, R. Ullmann, M. Nakao, P. Borzemski, R. G. Feild, M. Geerts, M. Posocco, T. W. Jones, A. N. Solomin, A. H. Walenta, DG Roff, L. Labarga, E. A. De Wolf, J. K. Sedgbeer, M. Eckert, L. Bellagamba, A.S. Wilson, L. Lamberti, Wouter Verkerke, C.R. Sampson, U. Mallik, Greg P Heath, J. R. Okrasinski, Jeffrey T. Rahn, L. M. Shcheglova, M. Grothe, P. Giusti, Gm Levman, B.Y. Oh, G. Zacek, G. L. Bashindzhagyan, A. Pesci, W.B. Schmidke, G. Drews, R. J. Teuscher, P. M. Patel, L. Heinz, J. A. Parsons, P. Joos, J. Stamm, A.F. Whitfield, S. W. Nam, B. A. Dolgoshein, Stefano Maria Mari, A. Quadt, D. S. Bailey, O. Schwarzer, Helen F Heath, J. Große-Knetter, V.A. Noyes, J.J. Engelen, Giuseppe Iacobucci, N. Pavel, J. R. Tickner, B. Foster, D. S. Waters, D. Krakauer, Jens Hartmann, G. Bruni, W. Hain, Z. Jing, M. Dardo, P.M. Kooijman, A. Dannemann, B. Lu, M. Brkic, J. Shulman, S. Ritz, D. S. Hanna, Vladimir Bashkirov, C. Amelung, M. L. Utley, N. Wulff, M. Riveline, M. Lancaster, J.T. Wu, Juan Terron, M. Kasprzak, K. Yamauchi, Y. Iga, J. Zając, H. Kowalski, A. Frey, M. Flasiński, N. Dyce, C. Voci, B. H. Y. Hung, J. K. Bienlein, Anselmo Margotti, L.W. Wiggers, E. Rulikowska-Zarebska, C. Li, P. Antonioli, A.I. van Sighem, K. Wick, G. Abbiendi, J.D. McFall, Marco Schioppa, G. Grzelak, T. C. Bacon, D. Hasell, G. D'Agostini, S. Mattingly, D. Schramm, C. A. Heusch, Luisa Cifarelli, L. K. Gladilin, Neville Harnew, D. Mikunas, G. Howell, J. Bulmahn, J. I. Fleck, D. Lüke, A. Polini, P.F. Ermolov, P. Bruni, P. G. Pelfer, T.P. Shah, Mark Sutton, T. Doeker, G. Briskin, Q. Zhu, S. M. Wang, D. H. Saxon, Costas Foudas, L.W. Mo, J. A. Zakrzewski, D. Westphal, F. Zuin, T. Y. Ling, S. Kartik, L. Lindemann, S. De Pasquale, M.C.K. Mattingly, U. Karshon, L. S. Durkin, E. Lohrmann, D. Zer-Zion, C. Glasman, P. Göttlicher, R. Hamatsu, Luis Hervas, I. Suzuki, S. Mine, D. Boscherini, R. Yoshida, J. Puga, Robert Klanner, A. Vaiciulis, R. S. Orr, A. Caldwell, G. Castellini, William S. Lockman, Michele Arneodo, H. F.W. Sadrozinski, J.S.T. Ng, Y. Eisenberg, D.J. Gilkinson, R. Walczak, J. M. Pawlak, P. B. Straub, Kenneth Long, R. Deffner, M. Adamus, A. Bornheim, K. Heinloth, A. Garfagnini, G. Bari, Giuseppe Barbagli, A. Ladage, J. Roldán, Hao Zhang, S. Magill, W. Schulz, G. Marini, Francois Corriveau, M. Van Hook, A. Kotański, K. Muchorowski, B. Bednarek, Np Zotov, I. H. Park, Wolfram Dietrich Zeuner, A.K. Wróblewski, A. Bamberger, Ben Bylsma, J. Milewski, O. Yu. Lukina, G. Sartorelli, R. Wedemeyer, M. Przybycien, B. J. Ko, H. Hartmann, L.A.T. Bauerdick, Giuseppe Levi, F. Zetsche, A. A. Savin, L. Suszycki, K. Jelen, S. Eisenhardt, Roberto Carlin, W.R. Frisken, Sridhara Dasu, D. Chapin, Halina Abramowicz, A. Bertolin, U. Schneekloth, J. F. de Trocóniz, I. Butterworth, F. Dal Corso, L. Zawiejski, Roberto Cirio, A. Cassidy, W.F. Badgett, Ta Romanowski, B. Musgrave, E. Paul, A. Stifutkin, F. F. Wilson, Jonathan Butterworth, B. Löhr, R. L. Talaga, S. Kitamura, Ada Solano, S. Limentani, M. Z. Wang, S. Bhadra, M. Zachara, Shoichi Yamada, R.C.E. Devenish, G. Laurenti, L. Iannotti, A. Prinias, Elisabetta Gallo, W. Koch, H. Beier, Tadeusz Kowalski, G. Poelz, Lutz Feld, J.T. Bromley, W. Metcalf, U. Holm, D. Acosta, Dg Stairs, Krzysztof Piotrzkowski, D. Sideris, D. B. Miller, Jose Repond, K. Ohrenberg, J. Gajewski, W. H. Smith, Mário Costa, G. H. Cho, J. Labs, F.S. Chlebana, M. Basile, T. Haas, V. D. Kobrin, T. Dubbs, J. Biltzinger, P. Cloth, R. Ayad, J. Breitweg, J. M. Hernandez, G. Cara Romeo, N. Brümmer, Simon George, Tachishige Hirose, M. Kuze, T. Matsushita, L. Wai, and R. Stroili
Subjects: Nuclear physics, Physics, Particle physics, Physics and Astronomy (miscellaneous), Rapidity, Center of mass, HERA, Zeus (malware), Energy (signal processing), Boson, Bar (unit)
Abstract: Deep inelastic charged-current reactions have been studied ine+p ande−p collisions at a center of mass energy of about 300GeV in the kinematic regionQ2>200GeV2 andx>0.006 using the ZEUS detector at HERA. The integrated cross sections forQ2>200GeV2 are found to be $\sigma _{e^ + p \to \bar \nu X} = 30.3_{ - 4.2 - 2.6}^{ + 5.5 + 1.6} pb$ and $\sigma _{e^ - p \to \nu X} = 54.7_{ - 9.8 - 3.4}^{ + 15.9 + 2.8} pb$. Differential cross sections have been measured as functions of the variablesx, y andQ2. From the measured differential cross sectionsdσ/dQ2, theW boson mass is determined to be $M_W = 79_{ - 7 - 4}^{ + 8 + 4} GeV$. Measured jet rates and transverse energy profiles agree with model predictions. A search for charged-current interactions with a large rapidity gap yielded one candidate event, corresponding to a cross section of $\sigma _{e^ + p \to \bar \nu X} (Q^2 > 200 GeV^2 ; \eta _{\max }< 2.5) = 0.8_{ - 0.7}^{ + 1.8} \pm 0.1 pb$
Published: 1996

3. Measurement of elasticρ 0 photoproduction at HERA

Author: D.D. Reeder, A. Bertolin, B. Diekmann, M. Wodarczyk, M. Lancaster, J.T. Wu, J. Zając, J. F. de Trocóniz, L. Zawiejski, Roberto Cirio, S.H. An, D. Mikunas, H.-P. Jakob, P. Morawitz, Rosario Nania, Sung Keun Park, R. L. Saunders, B. Musgrave, M. St.Laurent, G. Briskin, P. B. Kaziewicz, D. Krakauer, L. Lamberti, Simon George, Detlef Filges, Q. Zhu, R. Brugnera, P.M. Kooijman, Miguel Molina Martínez, H. Uijterwaal, E. Gallo, M. Roco, E. McCliment, V. A. Kuzmin, D. C. Bailey, Tachishige Hirose, M.C.K. Mattingly, L. S. Durkin, A. Dannemann, A. Stifutkin, M. De Giorgi, M. L. Utley, J. Shulman, T. Tsurugai, Aleksander Filip Żarnecki, Silvia Maselli, R. Hamatsu, A. Seiden, J. Puga, B. Surrow, Gm Levman, Giuseppe Barbagli, J. Bulmahn, D. S. Waters, Juan Terron, M. Kasprzak, M. Kuze, E. Rulikowska-Zarebska, J. I. Fleck, Y. Nagasawa, R. S. Orr, G. Zech, M. Flasiński, Vladimir Bashkirov, S.S. Wilson, A. Nigro, P. B. Straub, Kenneth Long, K. Yamauchi, S. Mengel, J. Mainusch, A. Eskreys, A. T. Doyle, A. Byrne, J. A. Zakrzewski, B. Bargende, L. Wai, B. Behrens, D. Horstmann, A. Dake, N. H. Brook, K. Wick, A. Prinias, L. Labarga, Wouter Verkerke, G. Bari, C.J.S. Morgado, M. Adamus, G. Marini, V. L. Harris, Michele Arneodo, D. C. Williams, R. Stroili, L. M. Shcheglova, T.L. Short, B. A. Dolgoshein, N. Bruemmer, Cg Matthews, M. de Kamps, H. J. Kim, Giovanni Maccarrone, S. Schlenstedt, P. J. Bussey, Giovanna Bruni, M. Van Hook, B. Bednarek, R. Yoshida, Np Zotov, Wolfram Dietrich Zeuner, A.K. Wróblewski, A. Bamberger, Avto Kharchilava, W. Schott, Cd Catterall, W. Koch, M. Eckert, L. Bellagamba, A.F. Whitfield, S. W. Nam, L. Köpke, C. Fordham, R. Loveless, Giuseppe Iacobucci, M. Rohde, A. M. Cooper-Sarkar, S. Dagan, M. Khakzad, M. L. Cardy, Roberto Sacchi, J.J. Engelen, J. M. Pawlak, A. Garfagnini, N. Pavel, I. Suzuki, William S. Lockman, J. F. Martin, Jose Repond, K. Ohrenberg, F. Zetsche, H. Beier, D. J. P. Norman, K. Honscheid, Aharon Levy, Y. Nakamitsu, Katsuo Tokushuku, T. Yip, F. J. Sciulli, I. H. Park, G. Grzelak, H.G.J.M. Tiecke, F. Benard, Roberto Carlin, Yu. A. Golubkov, E. Paul, M. Geerts, K. Blankenship, C.R. Sampson, P. Giusti, G. Zacek, G. Drews, J. A. Parsons, J. N. Lim, Cristiana Peroni, R. Sinkus, A. Freidhof, R. J. Tapper, G. F. Susinno, R. J. Cashmore, A. A. Savin, M. Derrick, M. Posocco, Geoffrey Smith, S. Ritz, D. S. Hanna, Anselmo Margotti, L.W. Wiggers, T. Tymieniecka, L. Suszycki, Jeffrey T. Rahn, Umberto Dosselli, P. M. Patel, Janusz Chwastowski, J. A. O'Mara, A. Bernstein, Y. Zamora Garcia, T. Voß, C. Youngman, V.A. Noyes, Tadeusz Kowalski, D. Acosta, S. Nickel, D. B. Miller, B. D. Burow, Ben Bylsma, J. Milewski, W.N. Murray, G. Anzivino, W. H. Smith, Mário Costa, H. Hartmann, Dg Stairs, U. Kötz, T. C. Bacon, J.B. Lane, J. Mollen, G. Poelz, Masashi Hazumi, E. A. De Wolf, J. Gajewski, A. Frey, M. Nakao, P. Borzemski, Giuseppe Levi, Gy. Wolf, Rr Rau, K. Jelen, J. R. Tickner, J. Ciborowski, S. Polenz, C. Rembser, Marcel Vreeswijk, R. Ullmann, P. Nylander, F.S. Chlebana, N. A. McCubbin, K. K. Joo, V. K. Nadendla, Masami Chiba, Klaus Kurt Desch, James Crittenden, O. Mańczak, T.P. Shah, S. M. Wang, D. H. Saxon, R. J. Nowak, M. Grothe, F. Selonke, E. Hilger, W.R. Frisken, J. Labs, G. F. Hartner, Ulf Behrens, Federico Cindolo, W. Bogusz, H. Kowalski, J. P. Fernandez, M. Dardo, C. Coldewey, Lutz Feld, M. Basile, A. B. Meyer, T. Haas, V. D. Kobrin, T. Dubbs, Samuel Silverstein, A.S. Wilson, Antonino Zichichi, P. Göttlicher, E. Stiliaris, D. Lüke, J. Del Peso, J. Biltzinger, A. Polini, K. Prytz, U. Schneekloth, W. Metcalf, M. Krzyżanowski, I. A. Korzhavina, S. De Pasquale, R. Ayad, I. Butterworth, M. H. Suh, U. Holm, B. Lu, L.E. Sinclair, D. Westphal, L. Hagge, Marco Schioppa, R. J. Seifert, P. G. Pelfer, Sridhara Dasu, B.Y. Oh, U. Karshon, A.S. Proskuryakov, R. Seidlein, Stefano Maria Mari, G. Cara Romeo, T. Ishii, K. Homma, Luis Hervas, D. Boscherini, R. van Woudenberg, A. Quadt, J. M. Hernandez, M. Zachara, Krzysztof Piotrzkowski, Ta Romanowski, G. Castellini, Shoichi Yamada, Fernando Barreiro, C. Li, J.S.T. Ng, R.C.E. Devenish, B. Y. H. Hung, F. Dal Corso, Halina Abramowicz, T. Hasegawa, H. F.W. Sadrozinski, A. Leich, W.F. Badgett, F. F. Wilson, M. Chiarini, G. Cases, Mauro Morandin, Danuta Kisielewska, G. Laurenti, Debades Bandyopadhyay, T. Massam, L. W. Hung, Jonathan Butterworth, T. J. Llewellyn, I. Ali, D. S. Bailey, D. Schramm, O. Schwarzer, S. M. Hong, Helen F Heath, R. L. Talaga, E. Tassi, Matthias Kasemann, I. Gialas, Jens Hartmann, L. Iannotti, K. M. Furutani, E. Lohrmann, D. Revel, Mariusz Przybycien, D. Notz, M. Corradi, S. Yang, J. Schroeder, A. H. Walenta, S. Campbell-Robson, R.S. Gilmore, W. Schulz, H.J. Grabosch, E. Barberis, J. K. Bienlein, O. Deppe, A. N. Solomin, S. H. Yon, U. Mallik, T. W. Jones, Anna Goussiou, Leszek Adamczyk, Yasunori Yamazaki, G. L. Bashindzhagyan, B. Gutjahr, Greg P Heath, John Hart, W.B. Schmidke, R. J. Teuscher, M.I. Ferrero, J. Große-Knetter, Douglas Gingrich, R. G. Feild, R. R. McNeil, K. Charchuła, A. Bruni, M. Löwe, S. Kartik, J.D. McFall, K. Muchorowski, R. Wedemeyer, J. J. Whitmore, Francois Corriveau, C. A. Heusch, J.F. Zhou, P.F. Ermolov, W. Hain, A. Kotański, P. Bruni, Costas Foudas, L.W. Mo, A. Caldwell, Christian Nemoz, L.A.T. Bauerdick, M.A.J. Botje, D. Zer-Zion, K.W. McLean, Ricardo Graciani, Y. Iga, A. Ladage, S. Söldner-Rembold, C. P. Fagerstroem, N. Dyce, Amedeo Staiano, O. Yu. Lukina, U. F. Katz, M. Pfeiffer, P. Cloth, R. Imlay, Ada Solano, C. Voci, S. Limentani, S. Magill, T. Doeker, M. Z. Wang, S. Bhadra, J. Gilmore, T. Timellini, A. Cassidy, R. Stanek, E. Badura, M. Nakahata, Luca Stanco, J. K. Sedgbeer, T. Neumann, B. Löhr, K. Desler, S. Kitamura, Thomas Trefzger, K.F. Johnson, Hao Zhang, Andrea Contin, A. Kruse, T. Monteiro, S. Eisenhardt, Marcella Capua, N. Cartiglia, C. Glasman, S. Mine, A. Bornheim, F. Palmonari, P. Joos, J. Stamm, B. Foster, Luisa Cifarelli, L. K. Gladilin, Neville Harnew, Y. Eisenberg, D.J. Gilkinson, R. Walczak, K. Heinloth, J. Roldán, G. Sartorelli, M. Brkic, N. Wulff, D. Hasell, G. D'Agostini, T. Y. Ling, L. Lindemann, Giovanni Abbiendi, Robert Klanner, A. Vaiciulis, Lucia Votano, C. Nath, and H. Heßling
Subjects: Nuclear physics, Physics, Cross section (physics), ZEUS (particle detector), Pion, Physics and Astronomy (miscellaneous), Proton, Vertex (curve), High Energy Physics::Experiment, Invariant mass, HERA, Nuclear Experiment, Helicity
Abstract: Elasticρ0 photoproduction has been measured using the ZEUS detector at HERA. Untagged photoproduction events fromep interactions were used to measure the reactionγp→ρ0p(ρ0)→π+π−) at photon-proton centre-of-mass energies between 60 and 80 GeV and |t
Published: 1995

4. Measurement of the proton structure functionF 2 at lowx and lowQ 2 at HERA

Author: D. Krakauer, M. L. Utley, J. Mollen, J. I. Fleck, Y. Nagasawa, P. Nylander, K. K. Joo, O. Mańczak, G. F. Hartner, R. Yoshida, J. A. Zakrzewski, Thomas Trefzger, F. J. Sciulli, K.F. Johnson, P. Bruni, Costas Foudas, A. M. Cooper-Sarkar, S. Dagan, M. Khakzad, M. L. Cardy, K. Honscheid, Yu. A. Golubkov, Vladimir Bashkirov, H. Tiecke, M. Posocco, Geoffrey Smith, L.W. Mo, Andrea Contin, C. Händel-Pikielny, J. F. Martin, N. Bruemmer, Christian Nemoz, A. Caldwell, A. Frey, F. Selonke, L. Köpke, Ulf Behrens, Federico Cindolo, W. Bogusz, A. Cassidy, Y. Iga, N. Dyce, J. Ciborowski, A. Kruse, D. Schramm, C. A. Heusch, E. Hilger, G. Grzelak, R. Ullmann, C. Voci, T. Monteiro, J. M. Pawlak, T. C. Bacon, T. Yip, Mariusz Przybycien, M. Corradi, A. Bernstein, Y. Zamora Garcia, T. Voß, M. Nakahata, Cg Matthews, M.A.J. Botje, Marcella Capua, W. Metcalf, U. Holm, A. Garfagnini, Fernando Barreiro, Mauro Morandin, Hao Zhang, M. Dardo, C. Coldewey, S. Yang, Jens Hartmann, P. Cloth, N. Pavel, I. Suzuki, William S. Lockman, K.W. McLean, S. Nickel, D. B. Miller, J. Gajewski, A. Ladage, Ricardo Graciani, S. Söldner-Rembold, K. Prytz, N. Cartiglia, K. Muchorowski, P. Kooijman, L. W. Hung, T. Neumann, Lucia Votano, T.P. Shah, E. Lohrmann, B. Löhr, C. Nath, C. P. Fagerstroem, H. Heßling, F. Palmonari, M. Krzyżanowski, W. N. Murray, S. M. Wang, S. De Pasquale, D. H. Saxon, I. H. Park, O. Yu. Lukina, Ben Bylsma, D. Lüke, A. Polini, S. Campbell-Robson, S. Kitamura, Amedeo Staiano, U. F. Katz, R. Wedemeyer, M. Basile, Rosario Nania, Sung Keun Park, J. K. Bienlein, T. Doeker, J. Milewski, S. Eisenhardt, Y. Eisenberg, H.J. Grabosch, S. Kartik, P. Göttlicher, J. Gilmore, M. Pfeiffer, T. Haas, V. D. Kobrin, T. Dubbs, Antonino Zichichi, ME Hayes, E. Tassi, A. Nigro, D.J. Gilkinson, B. Lu, S. W. Nam, R. Ayad, R. Walczak, J. Biltzinger, B.Y. Oh, M. H. Suh, M. Zachara, Krzysztof Piotrzkowski, K. Heinloth, Giuseppe Barbagli, D. Filges, J. Roldán, M. Eckert, L. Bellagamba, Shoichi Yamada, R.C.E. Devenish, Francois Corriveau, H. Hartmann, E. McCliment, D. Revel, G. Cara Romeo, A. Dannemann, H.-P. Jakob, P. Joos, R. L. Saunders, O. Deppe, J. Stamm, A.F. Whitfield, A. Kotański, A. Meyer, A. Seiden, G. Laurenti, L.A.T. Bauerdick, B. Foster, M. Lancaster, J. M. Hernandez, R. Brugnera, C. Li, G. Sartorelli, J.T. Wu, J.R. Okrasiński, J. Bulmahn, J. Zając, Yasunori Yamazaki, G. Cases, D. C. Bailey, B. Gutjahr, V. A. Kuzmin, R. Stanek, M. De Giorgi, C. Youngman, A. Eskreys, A. T. Doyle, L. Labarga, Wouter Verkerke, R. R. McNeil, E. Badura, D. Mikunas, W. N. Cottingham, C. Fordham, Luisa Cifarelli, L. K. Gladilin, Neville Harnew, P. Morawitz, B. Y. H. Hung, Sridhara Dasu, Marcel Vreeswijk, T.L. Short, D Piccioni, B. A. Dolgoshein, John Hart, W. Schulz, Luca Stanco, K. Desler, L. Iannotti, Ada Solano, Gm Levman, S. Ritz, D. S. Hanna, Halina Abramowicz, D. C. Williams, D. S. Waters, S. Limentani, J. Del Peso, Aleksander Filip Żarnecki, Silvia Maselli, G. Briskin, E. Rulikowska-Zarcebska, Roberto Carlin, M. de Kamps, K. Charchuła, K. Yamauchi, Q. Zhu, M. Brkic, L.E. Sinclair, K. Homma, H. J. Kim, C. Glasman, N. Wulff, Cristiana Peroni, R. J. Cashmore, Roberto Sacchi, H. Kowalski, M. Z. Wang, D. Hasell, G. D'Agostini, Giovanni Maccarrone, J. K. Sedgbeer, Anselmo Margotti, Simon George, S. Mine, S. Schlenstedt, S. Bhadra, A. Bruni, T. Y. Ling, L. Lindemann, L.W. Wiggers, P. J. Bussey, M. Löwe, Tachishige Hirose, J.D. McFall, D. Horstmann, R. Timellini, A. Dake, N. H. Brook, V. L. Harris, B. D. Burow, Giovanni Abbiendi, Robert Klanner, A. Vaiciulis, G. Bruni, M. Derrick, A. Prinias, Elisabetta Gallo, T. Tymieniecka, A. Bornheim, E. Barberis, J. A. O'Mara, P.F. Ermolov, Jose Repond, G. Anzivino, K. Ohrenberg, Giuseppe Levi, W. Koch, M. Rohde, Danuta Kisielewska, A. N. Solomin, U. Kötz, U. Mallik, Aharon Levy, D. Westphal, P. Giusti, J. T. Rahn, M. Nakao, P. Borzemski, M. Kuze, T. Massam, J. N. Lim, A. Bertolin, Greg P Heath, K. Jelen, J. Engelen, G. Zacek, G. Drews, J. A. Parsons, U. Karshon, H. Beier, A.S. Wilson, J. J. Whitmore, W. Hain, R. Sinkus, Luis Hervas, D. Zer-Zion, J. F. de Trocóniz, L. Zawiejski, W.R. Frisken, I. Ali, D. Boscherini, Tadeusz Kowalski, V. K. Nadendla, R. J. Nowak, W. H. Smith, J. Große-Knetter, Roberto Cirio, D. S. Bailey, O. Schwarzer, Helen F Heath, G. Poelz, J.F. Zhou, G. Castellini, L. Wai, Mário Costa, A. H. Walenta, DG Roff, Lutz Feld, M.C.K. Mattingly, L. S. Durkin, Douglas Gingrich, Giancarlo Susinno, B. Musgrave, M. St.Laurent, J.S.T. Ng, R. Stroili, R. Hamatsu, R. Imlay, K. Wick, E. Paul, J. Puga, F.S. Chlebana, U. Schneekloth, A. Stifutkin, I. Gialas, I. Butterworth, S. Magill, M. Adamus, J. Schroeder, S. Polenz, Ta Romanowski, G. Marini, Np Zotov, Wolfram Dietrich Zeuner, A.K. Wróblewski, A. Bamberger, Masami Chiba, Klaus Kurt Desch, Matthias Kasemann, K. M. Furutani, F. F. Wilson, M. Chiarini, Leszek Adamczyk, Jonathan Butterworth, J. P. Fernandez, D. Notz, I. A. Korzhavina, M.I. Ferrero, S. H. Yon, D. Acosta, T. W. Jones, Anna Goussiou, Dg Stairs, G. L. Bashindzhagyan, W.B. Schmidke, R. J. Teuscher, R. G. Feild, J. Labs, A. Freidhof, James Crittenden, M. Grothe, L. Heinz, R. S. Orr, P. B. Straub, Kenneth Long, F. Dal Corso, Marco Schioppa, P. G. Pelfer, B. Behrens, G. Bari, R. Seidlein, T. Hasegawa, M. Van Hook, B. Bednarek, A. Leich, W.F. Badgett, H. F.W. Sadrozinski, F. Zetsche, Y. Nakamitsu, Katsuo Tokushuku, R. J. Tapper, J. Shulman, Umberto Dosselli, Debades Bandyopadhyay, Janusz Chwastowski, E. A. De Wolf, J. R. Tickner, D.D. Reeder, Juan Terron, M. Kasprzak, B. Diekmann, G. Zech, M. Flasiński, M. Wodarczyk, S. M. Hong, Masashi Hazumi, R. L. Talaga, C. Rembser, N. A. McCubbin, Samuel Silverstein, E. Stiliaris, L. Hagge, P. B. Kaziewicz, T. Ishii, R. J. Seifert, L. Lamberti, Stefano Maria Mari, A. Quadt, H. Uijterwaal, L. M. Shcheglova, A.S. Proskuryakov, C.J.S. Morgado, Michele Arneodo, R. van Woudenberg, F. Benard, M. Martinez, A. A. Savin, L. Suszycki, Giuseppe Iacobucci, R. Loveless, M. Geerts, K. Blankenship, C.R. Sampson, J.B. Lane, P. M. Patel, Gy. Wolf, Rr Rau, B. Surrow, S.H. An, V.A. Noyes, M. Roco, T. Tsurugai, S. Mengel, J. Mainusch, A. Byrne, Avto Kharchilava, W. Schott, and Cd Catterall
Subjects: Nuclear physics, Physics, Range (particle radiation), Physics and Astronomy (miscellaneous), Proton, law, Structure (category theory), Perturbative QCD, HERA, Collider, Deep inelastic scattering, law.invention, Positron energy
Abstract: We report on a measurement of the proton structure function F 2 in the range 3.5×10-5≤x≤4×10-3 and 1.5 GeV2≤Q 2≤15GeV2 at the ep collider HERA operating at a centre-of-mass energy of √s=300GeV. The rise of F 2 with decreasing x observed in the previous HERA measurements persists in this lower x and Q 2 range. The Q 2 evolution of F 2, even at the lowest Q 2 and x measured, is consistent with perturbative QCD. © 1996 Springer-Verlag.
Published: 1995

5. Jet shapes at HERA

Author: ZEUS Collaboration M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasin´ ski, J. Repond, R. Stanek, R. L. Ta laga, H. Zhang Argonne National Laboratory, Argonne, IL 60439, USA p. M. C. K. Mattingly Andrews University, Berrien Springs, USA F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini1, L. Cifarelli2, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, A. Polini, G. Sartorelli, Y. Zamora Garcia3, A. Zichichi University, INFN Bologna, I. 40126 Bologna, Italy f. C. Amelung, A. Bornheim, J. Crittenden, R. Deffner, M. Eckert, L. Feld, A. Frey4, M. Geerts5, M. Grothe, H. Hartmann, K. Heinloth, L. Heinz, E. Hilger, H. P. Jakob, U. F. Katz, S. Mengel6, E. Paul, M. Pfeiffer, C.h. Rembser, D. Schramm7, J. Stamm, R. Wedemeyer Physikalisches Institut der Universita¨t Bonn, D. 53115 Bonn, Germany c. S. Campbell Robson, A. Cassidy, W. N. Cottingham, N. Dyce, B. Foster, S. George, M. E. Hayes, G. P. Heath, H. F. Heath, D. Piccioni, D. G. Roff, R. J. Tapper, R. Yoshida H. H. Wills Physics Laboratory, University of Bristol, Bristol B58 1TL, U. K. o. M. Arneodo8, R. Ayad, M. Capua, A. Garfagnini, L. Iannotti, M. Schioppa, G. Susinno Calabria University, Physics D.e.p.t. and INFN, Cosenza, Italy f. A. Caldwell9, N. Cartiglia, Z. Jing, W. Liu, J. A. Parsons, S. Ritz10, F. Sciulli, P. B. Straub, L. Wai11, S. Yang12, Q. Zhu Columbia University, Nevis Labs, Irvington on Hudson, NY 10533, USA q. P. Borzemski, J. Chwastowski, A. Eskreys, Z. Jakubowski, M. B. Przybycien´, M. Zachara, L. Zawiejski I.n.s.t. of Nuclear Physics, PL 30055 Cracow, Poland j. L. Adamczyk, B. Bednarek, K. Jelen´, D. Kisielewska, T. Kowalski, M. Przybycien´, E. Rulikowska Zare¸bska, L. Suszycki, J. Zaja¸c Faculty of Physics, Nuclear Techniques, Academy of Mining, Metallurgy, Poland j. Z. Dulin´ ski, A. Kotan´ ski Jagellonian Univ, D.e.p.t. of Physics, PL 30059 Cracow, Poland k. G. Abbiendi13, L. A. T. Bauerdick, U. Behrens, H. Beier, J. K. Bienlein, G. Cases, O. Deppe, K. Desler, G. Drews, M. Flasin´ ski14, D. J. Gilkinson, C. Glasman, P. Go¨ ttlicher, J. Große Knetter, T. Haas, W. Hain, D. Hasell, H. Heßling, Y. Iga, K. F. Johnson15, P. Joos, M. Kasemann, R. Klanner, W. Koch, U. Ko¨ tz, H. Kowalski, J. Labs, A. Ladage, B. Lo¨ hr, M. Lo¨ we, D. Lu¨ ke, J. Mainusch16, O. Man´ czak, J. Milewski, T. Monteiro17, J. S. T. Ng, D. Notz, K. Ohrenberg, K. Piotrzkowski, M. Roco, M. Rohde, J. Rolda´n, U. Schneekloth, W. Schulz, F. Selonke, B. Surrow, E. Tassi, T. Voß, D. Westphal, G. Wolf, U. Wollmer, C. Youngman, W. Zeuner Deutsches Elektronen Synchrotron DESY, D. 22603 Hamburg, Germany H. J. Grabosch, A. Meyer, S. Schlenstedt DESY IfH Zeuthen, D. 15738 Zeuthen, Germany G. Barbagli, E. Gallo, P. Pelfer University, INFN, Florence, Italy f. G. Maccarrone, S. De Pasquale, L. Votano INFN, Laboratori Nazionali di Frascati, I. 00044 Frascati, Italy f. A. Bamberger, S. Eisenhardt, T. Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B.r., D. 79104 Freiburg i. B.r., Germany c. J. T. Bromley, N. H. Brook, P. J. Bussey, A. T. Doyle, D. H. Saxon, L. E. Sinclair, E. Strickland, M. L. Utley, R. Waugh, A. S. Wilson D.e.p.t. of Physics, Astronomy, University of Glasgow, Glasgow G12 8QQ, U. K. o. A. Dannemann20, U. Holm, D. Horstmann, R. Sinkus21, K. Wick Hamburg University, I. Institute of E.x.p. Physics, D. 22761 Hamburg, Germany c. B. D. Burow22, L. Hagge16, E. Lohrmann, G. Poelz, W. Schott, F. Zetsche Hamburg University, I.I. Institute of E.x.p. Physics, Germany c. T. C. Bacon, N. Bru¨ mmer, I. Butterworth, V. L. Harris, G. Howell, B. H. Y. Hung, L. Lamberti23, K. R. Long, D. B. Miller, N. Pavel, A. Prinias24, J. K. Sedgbeer, D. Sideris, A. F. Whitfield Imperial College London, High Energy Nuclear Physics Group, London SW7 2BZ, U. K. o. U. Mallik, M. Z. Wang, S. M. Wang, J. T. Wu University of Iowa, Physics, Astronomy Dept, Iowa City, IA 52242, USA p. P. Cloth, D. Filges Forschungszentrum Ju¨ lich, Institut fu¨ r. Kernphysik, D. 52405 Ju¨ lich, Germany S. H. An, G. H. Cho, B. J. Ko, S. B. Lee, S. W. Nam, H. S. Park, S. K. Park Korea University, Seoul 136 701, Korea h. S. Kartik, H. J. Kim, R. R. McNeil, W. Metcalf, V. K. Nadendla Louisiana State University, Baton Rouge, LA 70803 4001, USA p. F. Barreiro, J. P. Fernandez, R. Graciani, J. M. Herna´ndez, L. Herva´s, L. Labarga, M. Martinez, J. del Peso, J. Puga, J. Terron, J. F. de Troco´ niz U.n.i.v.e.r. Auto´ noma Madrid, Depto de F´ısica Teo´ r´ıca, E. 28049 Madrid, Spain n. F. Corriveau, D. S. Hanna, J. Hartmann, L. W. Hung, J. N. Lim, C. G. Matthews25, W. N. Murray, A. Ochs, P. M. Patel, M. Riveline, D. G. Stairs, M. St Laurent, R. Ullmann, G. Zacek25 McGill University, Montre´al, PQ H3A 2T8, Canada a, b. T. Tsurugai Meiji Gakuin University, Faculty of General Education, Yokohama 244, Japan V. Bashkirov, B. A. Dolgoshein, A. Stifutkin Moscow Engineering Physics Institute, RU 115 409 Moscow, Russia l. G. L. Bashindzhagyan26, P. F. Ermolov, L. K. Gladilin, Y.u. A. Golubkov, V. D. Kobrin, I. A. Korzhavina, V. A. Kuzmin, O. Y.u. Lukina, A. S. Proskuryakov, A. A. Savin, L. M. Shcheglova, A. N. Solomin, N. P. Zotov Moscow State University, Institute of Nuclear Physics, RU 119 899 Moscow, Russia m. M. Botje, F. Chlebana, J. Engelen, M. de Kamps, P. Kooijman, A. Kruse, A. van Sighem, H. Tiecke, W. Verkerke, J. Vossebeld, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg27 NIKHEF, University of Amsterdam, NL 1009 DB Amsterdam, Netherlands i. D. Acosta, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, C. Li, T. Y. Ling, P. Nylander, I. H. Park, T. A. Romanowski28 Ohio State University, Physics Department, Columbus, OH 43210 1106, USA p. D. S. Bailey, R. J. Cashmore29, A. M. Cooper Sarkar, R. C. E. Devenish, N. Harnew, M. Lancaster30, L. Lindemann, J. D. McFall, C. Nath, V. A. Noyes24, A. Quadt, J. R. Tickner, H. Uijterwaal, R. Walczak, D. S. Waters, F. F. Wilson, T. Yip Department of Physics, University of Oxford, Oxford, U. K. o. A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, F. Zuin Dipartimento di Fisica dell’ Universita, INFN, I. 35131 Padova, Italy f. J. Bulmahn, R. G. Feild31, B. Y. Oh, J. J. Whitmore Pennsylvania State University, University Park, PA 16802, USA q. G. D’Agostini, G. Marini, A. Nigro Dipartimento di Fisica, U.n.i.v. ’La Sapienza’, I. 00185 Rome, Italy f. J. C. Hart, N. A. McCubbin, T. P. Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U. K. o. E. Barberis, T. Dubbs, C. Heusch, M. Van Hook, W. Lockman, J. T. Rahn, H. F. W. Sadrozinski, A. Seiden, D. C. Williams University of California, Santa Cruz, CA 93106, USA p. J. Biltzinger, R. J. Seifert, O. Schwarzer, A. H. Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D. 57012 Siegen, Germany c. H. Abramowicz, G. Briskin, S. Dagan32, T. Doeker32, A. Levy26 Raymond, Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv 69978, Israel e. J. I. Fleck33, M. Inuzuka, T. Ishii, M. Kuze, S. Mine, M. Nakao, I. Suzuki, K. Tokushuku, K. Umemori, S. Yamada, Y. Yamazaki Institute for Nuclear Study, University of Tokyo, Tokyo 113, Japan g. M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura34, T. Matsushita, K. Yamauchi Tokyo Metropolitan University, Tokyo 192 03, Japan g. R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano Universita di Torino, Dipartimento di Fisica Sperimentale, I. 10129 Torino, Italy f. M. Dardo II Faculty of Sciences, Torino University, INFN Alessandria, Italy f. D. C. Bailey, F. Benard, M. Brkic, C. P. Fagerstroem, G. F. Hartner, K. K. Joo, G. M. Levman, J. F. Martin, R. S. Orr, S. Polenz, C. R. Sampson, D. Simmons, R. J. Teuscher University of Toronto, Toronto, ON M5S 1A7, Canada a. J. M. Butterworth, C. D. Catterall, T. W. Jones, P. B. Kaziewicz, J. B. Lane, R. L. Saunders, J. Shulman, M. R. Sutton University College London, London WC1E 6BT, U. K. o. B. Lu, L. W. Mo Virginia Polytechnic Inst, State University, Physics Dept, Blacksburg, VA 24061, USA q. W. Bogusz, J. Ciborowski, J. Gajewski, G. Grzelak35, M. Kasprzak, M. Krzyz˙anowski, K. Muchorowski36, R. J. Nowak, J. M. Pawlak, T. Tymieniecka, A. K. Wro´ blewski, J. A. Zakrzewski, A. F. Z˙ arnecki Warsaw University, Institute of Experimental Physics, PL 00681 Warsaw, Poland j. M. Adamus Institute for Nuclear Studies, Poland j. C. Coldewey, Y. Eisenberg32, D. Hochman, U. Karshon32, D. Revel32, D. Zer Zion Weizmann Institute, Nuclear Physics Dept, Rehovot 76100, Israel d. W. F. Badgett, J. Breitweg, D. Chapin, R. Cross, S. Dasu, C. Foudas, R. J. Loveless, S. Mattingly, D. D. Reeder, S. Silverstein, W. H. Smith, A. Vaiciulis, M. Wodarczyk University of Wisconsin, Madison, WI 53706, USA p. S. Bhadra, M. L. Cardy37, W. R. Frisken, M. Khakzad, W. B. Schmidke York University, North York, Toronto ON M3J 1P3, Canada a., MARI, Stefano Maria, ZEUS Collaboration M., Derrick, D., Krakauer, S., Magill, D., Mikuna, B., Musgrave, J. R., Okrasin´ ski, J., Repond, R., Stanek, R. L., Ta laga, H., Zhang Argonne National Laboratory, Argonne, Il, 60439, USA p. M. C. K., Mattingly Andrews University, Berrien, Spring, Mi, USA F., Anselmo, P., Antonioli, G., Bari, M., Basile, L., Bellagamba, D., Boscherini, A., Bruni, G., Bruni, P., Bruni, G., Cara Romeo, G., Castellini1, L., Cifarelli2, F., Cindolo, A., Contin, M., Corradi, I., Giala, P., Giusti, G., Iacobucci, G., Laurenti, G., Levi, A., Margotti, T., Massam, R., Nania, F., Palmonari, A., Pesci, A., Polini, G., Sartorelli, Y., Zamora Garcia3, A., Zichichi University, Infn, Bologna, I., 40126 Bologna, Italy f. C., Amelung, A., Bornheim, J., Crittenden, R., Deffner, M., Eckert, L., Feld, A., Frey4, M., Geerts5, M., Grothe, H., Hartmann, K., Heinloth, L., Heinz, E., Hilger, H. P., Jakob, U. F., Katz, S., Mengel6, E., Paul, M., Pfeiffer, Rembser, C. h., D., Schramm7, J., Stamm, R., Wedemeyer Physikalisches Institut der Universita¨t Bonn, D., 53115 Bonn, Germany c. S., Campbell Robson, A., Cassidy, W. N., Cottingham, N., Dyce, B., Foster, S., George, M. E., Haye, G. P., Heath, H. F., Heath, D., Piccioni, D. G., Roff, R. J., Tapper, R. Yoshida H. H., Wills Physics Laboratory, University of, Bristol, Bristol B58, 1tl, U. K. o. M., Arneodo8, R., Ayad, M., Capua, A., Garfagnini, L., Iannotti, M., Schioppa, G., Susinno Calabria University, and INFN, Physics D. e. p. t., Cosenza, Italy f. A., Caldwell9, N., Cartiglia, Z., Jing, W., Liu, J. A., Parson, S., Ritz10, F., Sciulli, P. B., Straub, L., Wai11, S., Yang12, Q., Zhu Columbia University, Nevis, Lab, Irvington on, Hudson, Ny, 10533, USA q. P., Borzemski, J., Chwastowski, A., Eskrey, Z., Jakubowski, M. B., Przybycien´, M., Zachara, of Nuclear Physics, L. Zawiejski I. n. s. t., PL 30055, Cracow, Poland j. L., Adamczyk, B., Bednarek, K., Jelen´, D., Kisielewska, T., Kowalski, M., Przybycien´, E., Rulikowska Zare¸bska, L., Suszycki, J., Zaja¸c Faculty of Physic, Nuclear, Technique, Academy of, Mining, Metallurgy, Poland j. Z., Dulin´ ski, A., Kotan´ ski Jagellonian Univ, of Physics, D. e. p. t., PL 30059, Cracow, Poland k. G., Abbiendi13, L. A. T., Bauerdick, U., Behren, H., Beier, J. K., Bienlein, G., Case, O., Deppe, K., Desler, G., Drew, M., Flasin´ ski14, D. J., Gilkinson, C., Glasman, P., Go¨ ttlicher, J., Große Knetter, T., Haa, W., Hain, D., Hasell, H., Heßling, Y., Iga, K. F., Johnson15, P., Joo, M., Kasemann, R., Klanner, W., Koch, U., Ko¨ tz, H., Kowalski, J., Lab, A., Ladage, B., Lo¨ hr, M., Lo¨ we, D., Lu¨ ke, J., Mainusch16, O., Man´ czak, J., Milewski, T., Monteiro17, J. S. T., Ng, D., Notz, K., Ohrenberg, K., Piotrzkowski, M., Roco, M., Rohde, J., Rolda´n, U., Schneekloth, W., Schulz, F., Selonke, B., Surrow, E., Tassi, T., Voß, D., Westphal, G., Wolf, U., Wollmer, C., Youngman, W., Zeuner Deutsches Elektronen Synchrotron DESY, D., 22603 Hamburg, Germany H. J., Grabosch, Mari, Stefano Maria, A., Meyer, S., Schlenstedt DESY IfH Zeuthen, D., 15738 Zeuthen, Germany G., Barbagli, E., Gallo, P., Pelfer University, Infn, Florence, Italy f. G., Maccarrone, S., De Pasquale, L., Votano INFN, Laboratori Nazionali di, Frascati, I., 00044 Frascati, Italy f. A., Bamberger, S., Eisenhardt, T., Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B., R., D. 79104 Freiburg i. B., R., Germany c. J. T., Bromley, N. H., Brook, P. J., Bussey, A. T., Doyle, D. H., Saxon, L. E., Sinclair, E., Strickland, M. L., Utley, R., Waugh, of Physics, A. S. Wilson D. e. p. t., Astronomy, University of, Glasgow, Glasgow G12, 8qq, U. K. o. A., Dannemann20, U., Holm, D., Horstmann, R., Sinkus21, K., Wick Hamburg University, Physics, I. Institute of E. x. p., D., 22761 Hamburg, Germany c. B. D., Burow22, L., Hagge16, E., Lohrmann, G., Poelz, W., Schott, F., Zetsche Hamburg University, Physics, I. I. Institute of E. x. p., Germany c. T. C., Bacon, N., Bru¨ mmer, I., Butterworth, V. L., Harri, G., Howell, B. H. Y., Hung, L., Lamberti23, K. R., Long, D. B., Miller, N., Pavel, A., Prinias24, J. K., Sedgbeer, D., Sideri, A. F., Whitfield Imperial College London, High Energy Nuclear Physics, Group, London SW7, 2bz, U. K. o. U., Mallik, M. Z., Wang, S. M., Wang, J. T., Wu University of Iowa, Physics, Astronomy, Dept, Iowa, City, Ia, 52242, USA p. P., Cloth, D., Filges Forschungszentrum Ju¨ lich, Institut fu¨ r., Kernphysik, D., 52405 Ju¨ lich, Germany S. H., An, G. H., Cho, B. J., Ko, S. B., Lee, S. W., Nam, H. S., Park, S. K., Park Korea University, Seoul 136, 701, Korea h. S., Kartik, H. J., Kim, R. R., Mcneil, W., Metcalf, V. K., Nadendla Louisiana State University, Baton, Rouge, LA 70803, 4001, USA p. F., Barreiro, J. P., Fernandez, R., Graciani, J. M., Herna´ndez, L., Herva´, L., Labarga, M., Martinez, J., del Peso, J., Puga, J., Terron, Auto´ noma Madrid, J. F. de Troco´ niz U. n. i. v. e. r., Depto de F´ısica Teo´, R´ıca, E., 28049 Madrid, Spain n. F., Corriveau, D. S., Hanna, J., Hartmann, L. W., Hung, J. N., Lim, C. G., Matthews25, W. N., Murray, A., Och, P. M., Patel, M., Riveline, D. G., Stair, M., St Laurent, R., Ullmann, G., Zacek25 McGill University, Montre´al, PQ H3A, 2t8, Canada, A, b. T., Tsurugai Meiji Gakuin University, Faculty of General, Education, Yokohama, 244, Japan V., Bashkirov, B. A., Dolgoshein, A., Stifutkin Moscow Engineering Physics Institute, RU 115 409, Moscow, Russia l. G. L., Bashindzhagyan26, P. F., Ermolov, L. K., Gladilin, Golubkov, Y. u. A., V. D., Kobrin, I. A., Korzhavina, V. A., Kuzmin, Lukina, O. Y. u., A. S., Proskuryakov, A. A., Savin, L. M., Shcheglova, A. N., Solomin, N. P., Zotov Moscow State University, Institute of Nuclear, Physic, RU 119 899, Moscow, Russia m. M., Botje, F., Chlebana, J., Engelen, M., de Kamp, P., Kooijman, A., Kruse, A., van Sighem, H., Tiecke, W., Verkerke, J., Vossebeld, M., Vreeswijk, L., Wigger, E., de Wolf, R., van Woudenberg27 NIKHEF, University of, Amsterdam, NL 1009 DB, Amsterdam, Netherlands i. D., Acosta, B., Bylsma, L. S., Durkin, J., Gilmore, C. M., Ginsburg, C. L., Kim, C., Li, T. Y., Ling, P., Nylander, I. H., Park, T. A., Romanowski28 Ohio State University, Physics, Department, Columbus, OH 43210, 1106, USA p. D. S., Bailey, R. J., Cashmore29, A. M., Cooper Sarkar, R. C. E., Devenish, N., Harnew, M., Lancaster30, L., Lindemann, J. D., Mcfall, C., Nath, V. A., Noyes24, A., Quadt, J. R., Tickner, H., Uijterwaal, R., Walczak, D. S., Water, F. F., Wilson, T., Yip Department of Physic, University of, Oxford, Oxford, U. K. o. A., Bertolin, R., Brugnera, R., Carlin, F., Dal Corso, M., De Giorgi, U., Dosselli, S., Limentani, M., Morandin, M., Posocco, L., Stanco, R., Stroili, C., Voci, F., Zuin Dipartimento di Fisica dell’ Universita, Infn, I., 35131 Padova, Italy f. J., Bulmahn, R. G., Feild31, B. Y., Oh, J. J., Whitmore Pennsylvania State University, University, Park, Pa, 16802, USA q. G., D’Agostini, G., Marini, A., Nigro Dipartimento di Fisica, ’La Sapienza’, U. n. i. v., I., 00185 Rome, Italy f. J. C., Hart, N. A., Mccubbin, T. P., Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11, 0qx, U. K. o. E., Barberi, T., Dubb, C., Heusch, M., Van Hook, W., Lockman, J. T., Rahn, H. F. W., Sadrozinski, A., Seiden, D. C., Williams University of California, Santa, Cruz, Ca, 93106, USA p. J., Biltzinger, R. J., Seifert, O., Schwarzer, A. H., Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D., 57012 Siegen, Germany c. 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J., Teuscher University of Toronto, Toronto, ON M5S, 1a7, Canada a. J. M., Butterworth, C. D., Catterall, T. W., Jone, P. B., Kaziewicz, J. B., Lane, R. L., Saunder, J., Shulman, M. R., Sutton University College London, London WC1E, 6bt, U. K. o. B., Lu, L. W., Mo Virginia Polytechnic Inst, State, University, Physics, Dept, Blacksburg, Va, 24061, USA q. W., Bogusz, J., Ciborowski, J., Gajewski, G., Grzelak35, M., Kasprzak, M., Krzyz˙anowski, K., Muchorowski36, R. J., Nowak, J. M., Pawlak, T., Tymieniecka, A. K., Wro´ blewski, J. A., Zakrzewski, A. F., Z˙ arnecki Warsaw University, Institute of Experimental, Physic, PL 00681, Warsaw, Poland j. M., Adamus Institute for Nuclear Studie, Poland j. C., Coldewey, Y., Eisenberg32, D., Hochman, U., Karshon32, D., Revel32, D., Zer Zion Weizmann Institute, Nuclear Physics, Dept, Rehovot, 76100, Israel d. W. F., Badgett, J., Breitweg, D., Chapin, R., Cro, S., Dasu, C., Fouda, R. J., Lovele, S., Mattingly, D. D., Reeder, S., Silverstein, W. H., Smith, A., Vaiciuli, M., Wodarczyk University of Wisconsin, Madison, Wi, 53706, USA p. S., Bhadra, M. L., Cardy37, W. R., Frisken, M., Khakzad, W. B., Schmidke York University, North, York, Toronto ON M3J, 1p3, and Canada, A.
Abstract: The shape of jets produced in quasi-real photon-proton interactions and deep inelastic positron-proton scattering (DIS) at high Q(2) (Q(2) > 100 GeV2) has been measured with the ZEUS detector at HERA. Jets with transverse energies E-T(jet) > 14 GeV and pseudorapidities (eta(jet)) in the range -1 < eta(jet) < 2 are searched for using a cone algorithm in the ep-laboratory frame in the eta - phi plane with a cone radius of one unit. The jet shape broadens as eta(jet) increases and narrows as E-T(jet) increases. Next-to-leading order QCD calculations for inclusive jet photoproduction provide predictions for the jet shapes at the parton level which are found to be consistent with the measurements. The measured jet shapes in neutral current DIS are compared to those in photon-proton collisions and are found to be narrower. The measured jet shapes in DIS are found to be narrower than those in collisions, and are similar to those in e(+)e(-) interactions.
Published: 1997

6. High Q(2) events in ep collisions

Author: ZEUS Collaboration M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasin´ ski, J. Repond, R. Stanek, R. L. Ta laga, H. Zhang Argonne National Laboratory, Argonne, IL 60439, USA p. M. C. K. Mattingly Andrews University, Berrien Springs, USA F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini1, L. Cifarelli2, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, A. Polini, G. Sartorelli, Y. Zamora Garcia3, A. Zichichi University, INFN Bologna, I. 40126 Bologna, Italy f. C. Amelung, A. Bornheim, J. Crittenden, R. Deffner, M. Eckert, L. Feld, A. Frey4, M. Geerts5, M. Grothe, H. Hartmann, K. Heinloth, L. Heinz, E. Hilger, H. P. Jakob, U. F. Katz, S. Mengel6, E. Paul, M. Pfeiffer, C.h. Rembser, D. Schramm7, J. Stamm, R. Wedemeyer Physikalisches Institut der Universita¨t Bonn, D. 53115 Bonn, Germany c. S. Campbell Robson, A. Cassidy, W. N. Cottingham, N. Dyce, B. Foster, S. George, M. E. Hayes, G. P. Heath, H. F. Heath, D. Piccioni, D. G. Roff, R. J. Tapper, R. Yoshida H. H. Wills Physics Laboratory, University of Bristol, Bristol B58 1TL, U. K. o. M. Arneodo8, R. Ayad, M. Capua, A. Garfagnini, L. Iannotti, M. Schioppa, G. Susinno Calabria University, Physics D.e.p.t. and INFN, Cosenza, Italy f. A. Caldwell9, N. Cartiglia, Z. Jing, W. Liu, J. A. Parsons, S. Ritz10, F. Sciulli, P. B. Straub, L. Wai11, S. Yang12, Q. Zhu Columbia University, Nevis Labs, Irvington on Hudson, NY 10533, USA q. P. Borzemski, J. Chwastowski, A. Eskreys, Z. Jakubowski, M. B. Przybycien´, M. Zachara, L. Zawiejski I.n.s.t. of Nuclear Physics, PL 30055 Cracow, Poland j. L. Adamczyk, B. Bednarek, K. Jelen´, D. Kisielewska, T. Kowalski, M. Przybycien´, E. Rulikowska Zare¸bska, L. Suszycki, J. Zaja¸c Faculty of Physics, Nuclear Techniques, Academy of Mining, Metallurgy, Poland j. Z. Dulin´ ski, A. Kotan´ ski Jagellonian Univ, D.e.p.t. of Physics, PL 30059 Cracow, Poland k. G. Abbiendi13, L. A. T. Bauerdick, U. Behrens, H. Beier, J. K. Bienlein, G. Cases, O. Deppe, K. Desler, G. Drews, M. Flasin´ ski14, D. J. Gilkinson, C. Glasman, P. Go¨ ttlicher, J. Große Knetter, T. Haas, W. Hain, D. Hasell, H. Heßling, Y. Iga, K. F. Johnson15, P. Joos, M. Kasemann, R. Klanner, W. Koch, U. Ko¨ tz, H. Kowalski, J. Labs, A. Ladage, B. Lo¨ hr, M. Lo¨ we, D. Lu¨ ke, J. Mainusch16, O. Man´ czak, J. Milewski, T. Monteiro17, J. S. T. Ng, D. Notz, K. Ohrenberg, K. Piotrzkowski, M. Roco, M. Rohde, J. Rolda´n, U. Schneekloth, W. Schulz, F. Selonke, B. Surrow, E. Tassi, T. Voß, D. Westphal, G. Wolf, U. Wollmer, C. Youngman, W. Zeuner Deutsches Elektronen Synchrotron DESY, D. 22603 Hamburg, Germany H. J. Grabosch, A. Meyer, S. Schlenstedt DESY IfH Zeuthen, D. 15738 Zeuthen, Germany G. Barbagli, E. Gallo, P. Pelfer University, INFN, Florence, Italy f. G. Maccarrone, S. De Pasquale, L. Votano INFN, Laboratori Nazionali di Frascati, I. 00044 Frascati, Italy f. A. Bamberger, S. Eisenhardt, T. Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B.r., D. 79104 Freiburg i. B.r., Germany c. J. T. Bromley, N. H. Brook, P. J. Bussey, A. T. Doyle, D. H. Saxon, L. E. Sinclair, E. Strickland, M. L. Utley, R. Waugh, A. S. Wilson D.e.p.t. of Physics, Astronomy, University of Glasgow, Glasgow G12 8QQ, U. K. o. A. Dannemann20, U. Holm, D. Horstmann, R. Sinkus21, K. Wick Hamburg University, I. Institute of E.x.p. Physics, D. 22761 Hamburg, Germany c. B. D. Burow22, L. Hagge16, E. Lohrmann, G. Poelz, W. Schott, F. Zetsche Hamburg University, I.I. Institute of E.x.p. Physics, Germany c. T. C. Bacon, N. Bru¨ mmer, I. Butterworth, V. L. Harris, G. Howell, B. H. Y. Hung, L. Lamberti23, K. R. Long, D. B. Miller, N. Pavel, A. Prinias24, J. K. Sedgbeer, D. Sideris, A. F. Whitfield Imperial College London, High Energy Nuclear Physics Group, London SW7 2BZ, U. K. o. U. Mallik, M. Z. Wang, S. M. Wang, J. T. Wu University of Iowa, Physics, Astronomy Dept, Iowa City, IA 52242, USA p. P. Cloth, D. Filges Forschungszentrum Ju¨ lich, Institut fu¨ r. Kernphysik, D. 52405 Ju¨ lich, Germany S. H. An, G. H. Cho, B. J. Ko, S. B. Lee, S. W. Nam, H. S. Park, S. K. Park Korea University, Seoul 136 701, Korea h. S. Kartik, H. J. Kim, R. R. McNeil, W. Metcalf, V. K. Nadendla Louisiana State University, Baton Rouge, LA 70803 4001, USA p. F. Barreiro, J. P. Fernandez, R. Graciani, J. M. Herna´ndez, L. Herva´s, L. Labarga, M. Martinez, J. del Peso, J. Puga, J. Terron, J. F. de Troco´ niz U.n.i.v.e.r. Auto´ noma Madrid, Depto de F´ısica Teo´ r´ıca, E. 28049 Madrid, Spain n. F. Corriveau, D. S. Hanna, J. Hartmann, L. W. Hung, J. N. Lim, C. G. Matthews25, W. N. Murray, A. Ochs, P. M. Patel, M. Riveline, D. G. Stairs, M. St Laurent, R. Ullmann, G. Zacek25 McGill University, Montre´al, PQ H3A 2T8, Canada a, b. T. Tsurugai Meiji Gakuin University, Faculty of General Education, Yokohama 244, Japan V. Bashkirov, B. A. Dolgoshein, A. Stifutkin Moscow Engineering Physics Institute, RU 115 409 Moscow, Russia l. G. L. Bashindzhagyan26, P. F. Ermolov, L. K. Gladilin, Y.u. A. Golubkov, V. D. Kobrin, I. A. Korzhavina, V. A. Kuzmin, O. Y.u. Lukina, A. S. Proskuryakov, A. A. Savin, L. M. Shcheglova, A. N. Solomin, N. P. Zotov Moscow State University, Institute of Nuclear Physics, RU 119 899 Moscow, Russia m. M. Botje, F. Chlebana, J. Engelen, M. de Kamps, P. Kooijman, A. Kruse, A. van Sighem, H. Tiecke, W. Verkerke, J. Vossebeld, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg27 NIKHEF, University of Amsterdam, NL 1009 DB Amsterdam, Netherlands i. D. Acosta, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, C. Li, T. Y. Ling, P. Nylander, I. H. Park, T. A. Romanowski28 Ohio State University, Physics Department, Columbus, OH 43210 1106, USA p. D. S. Bailey, R. J. Cashmore29, A. M. Cooper Sarkar, R. C. E. Devenish, N. Harnew, M. Lancaster30, L. Lindemann, J. D. McFall, C. Nath, V. A. Noyes24, A. Quadt, J. R. Tickner, H. Uijterwaal, R. Walczak, D. S. Waters, F. F. Wilson, T. Yip Department of Physics, University of Oxford, Oxford, U. K. o. A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, F. Zuin Dipartimento di Fisica dell’ Universita, INFN, I. 35131 Padova, Italy f. J. Bulmahn, R. G. Feild31, B. Y. Oh, J. J. Whitmore Pennsylvania State University, University Park, PA 16802, USA q. G. D’Agostini, G. Marini, A. Nigro Dipartimento di Fisica, U.n.i.v. ’La Sapienza’, I. 00185 Rome, Italy f. J. C. Hart, N. A. McCubbin, T. P. Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U. K. o. E. Barberis, T. Dubbs, C. Heusch, M. Van Hook, W. Lockman, J. T. Rahn, H. F. W. Sadrozinski, A. Seiden, D. C. Williams University of California, Santa Cruz, CA 93106, USA p. J. Biltzinger, R. J. Seifert, O. Schwarzer, A. H. Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D. 57012 Siegen, Germany c. H. Abramowicz, G. Briskin, S. Dagan32, T. Doeker32, A. Levy26 Raymond, Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv 69978, Israel e. J. I. Fleck33, M. Inuzuka, T. Ishii, M. Kuze, S. Mine, M. Nakao, I. Suzuki, K. Tokushuku, K. Umemori, S. Yamada, Y. Yamazaki Institute for Nuclear Study, University of Tokyo, Tokyo 113, Japan g. M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura34, T. Matsushita, K. Yamauchi Tokyo Metropolitan University, Tokyo 192 03, Japan g. R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano Universita di Torino, Dipartimento di Fisica Sperimentale, I. 10129 Torino, Italy f. M. Dardo II Faculty of Sciences, Torino University, INFN Alessandria, Italy f. D. C. Bailey, F. Benard, M. Brkic, C. P. Fagerstroem, G. F. Hartner, K. K. Joo, G. M. Levman, J. F. Martin, R. S. Orr, S. Polenz, C. R. Sampson, D. Simmons, R. J. Teuscher University of Toronto, Toronto, ON M5S 1A7, Canada a. J. M. Butterworth, C. D. Catterall, T. W. Jones, P. B. Kaziewicz, J. B. Lane, R. L. Saunders, J. Shulman, M. R. Sutton University College London, London WC1E 6BT, U. K. o. B. Lu, L. W. Mo Virginia Polytechnic Inst, State University, Physics Dept, Blacksburg, VA 24061, USA q. W. Bogusz, J. Ciborowski, J. Gajewski, G. Grzelak35, M. Kasprzak, M. Krzyz˙anowski, K. Muchorowski36, R. J. Nowak, J. M. Pawlak, T. Tymieniecka, A. K. Wro´ blewski, J. A. Zakrzewski, A. F. Z˙ arnecki Warsaw University, Institute of Experimental Physics, PL 00681 Warsaw, Poland j. M. Adamus Institute for Nuclear Studies, Poland j. C. Coldewey, Y. Eisenberg32, D. Hochman, U. Karshon32, D. Revel32, D. Zer Zion Weizmann Institute, Nuclear Physics Dept, Rehovot 76100, Israel d. W. F. Badgett, J. Breitweg, D. Chapin, R. Cross, S. Dasu, C. Foudas, R. J. Loveless, S. Mattingly, D. D. Reeder, S. Silverstein, W. H. Smith, A. Vaiciulis, M. Wodarczyk University of Wisconsin, Madison, WI 53706, USA p. S. Bhadra, M. L. Cardy37, W. R. Frisken, M. Khakzad, W. B. Schmidke York University, North York, Toronto ON M3J 1P3, Canada a., MARI, Stefano Maria, ZEUS Collaboration M., Derrick, D., Krakauer, S., Magill, D., Mikuna, B., Musgrave, J. R., Okrasin´ ski, J., Repond, R., Stanek, R. L., Ta laga, H., Zhang Argonne National Laboratory, Argonne, Il, 60439, USA p. M. C. K., Mattingly Andrews University, Berrien, Spring, Mi, USA F., Anselmo, P., Antonioli, G., Bari, M., Basile, L., Bellagamba, D., Boscherini, A., Bruni, G., Bruni, P., Bruni, G., Cara Romeo, G., Castellini1, L., Cifarelli2, F., Cindolo, A., Contin, M., Corradi, I., Giala, P., Giusti, G., Iacobucci, G., Laurenti, G., Levi, A., Margotti, T., Massam, R., Nania, F., Palmonari, A., Pesci, A., Polini, G., Sartorelli, Y., Zamora Garcia3, A., Zichichi University, Infn, Bologna, I., 40126 Bologna, Italy f. C., Amelung, A., Bornheim, J., Crittenden, R., Deffner, M., Eckert, L., Feld, A., Frey4, M., Geerts5, M., Grothe, H., Hartmann, K., Heinloth, L., Heinz, E., Hilger, H. P., Jakob, U. F., Katz, S., Mengel6, E., Paul, M., Pfeiffer, Rembser, C. h., D., Schramm7, J., Stamm, R., Wedemeyer Physikalisches Institut der Universita¨t Bonn, D., 53115 Bonn, Germany c. S., Campbell Robson, A., Cassidy, W. N., Cottingham, N., Dyce, B., Foster, S., George, M. E., Haye, G. P., Heath, H. F., Heath, D., Piccioni, D. G., Roff, R. J., Tapper, R. Yoshida H. H., Wills Physics Laboratory, University of, Bristol, Bristol B58, 1tl, U. K. o. M., Arneodo8, R., Ayad, M., Capua, A., Garfagnini, L., Iannotti, M., Schioppa, G., Susinno Calabria University, and INFN, Physics D. e. p. t., Cosenza, Italy f. A., Caldwell9, N., Cartiglia, Z., Jing, W., Liu, J. A., Parson, S., Ritz10, F., Sciulli, P. B., Straub, L., Wai11, S., Yang12, Q., Zhu Columbia University, Nevis, Lab, Irvington on, Hudson, Ny, 10533, USA q. P., Borzemski, J., Chwastowski, A., Eskrey, Z., Jakubowski, M. B., Przybycien´, M., Zachara, of Nuclear Physics, L. Zawiejski I. n. s. t., PL 30055, Cracow, Poland j. L., Adamczyk, B., Bednarek, K., Jelen´, D., Kisielewska, T., Kowalski, M., Przybycien´, E., Rulikowska Zare¸bska, L., Suszycki, J., Zaja¸c Faculty of Physic, Nuclear, Technique, Academy of, Mining, Metallurgy, Poland j. Z., Dulin´ ski, A., Kotan´ ski Jagellonian Univ, of Physics, D. e. p. t., PL 30059, Cracow, Poland k. G., Abbiendi13, L. A. T., Bauerdick, U., Behren, H., Beier, J. K., Bienlein, G., Case, O., Deppe, K., Desler, G., Drew, M., Flasin´ ski14, D. J., Gilkinson, C., Glasman, P., Go¨ ttlicher, J., Große Knetter, T., Haa, W., Hain, D., Hasell, H., Heßling, Y., Iga, K. F., Johnson15, P., Joo, M., Kasemann, R., Klanner, W., Koch, U., Ko¨ tz, H., Kowalski, J., Lab, A., Ladage, B., Lo¨ hr, M., Lo¨ we, D., Lu¨ ke, J., Mainusch16, O., Man´ czak, J., Milewski, T., Monteiro17, J. S. T., Ng, D., Notz, K., Ohrenberg, K., Piotrzkowski, M., Roco, M., Rohde, J., Rolda´n, U., Schneekloth, W., Schulz, F., Selonke, B., Surrow, E., Tassi, T., Voß, D., Westphal, G., Wolf, U., Wollmer, C., Youngman, W., Zeuner Deutsches Elektronen Synchrotron DESY, D., 22603 Hamburg, Germany H. J., Grabosch, Mari, Stefano Maria, A., Meyer, S., Schlenstedt DESY IfH Zeuthen, D., 15738 Zeuthen, Germany G., Barbagli, E., Gallo, P., Pelfer University, Infn, Florence, Italy f. G., Maccarrone, S., De Pasquale, L., Votano INFN, Laboratori Nazionali di, Frascati, I., 00044 Frascati, Italy f. A., Bamberger, S., Eisenhardt, T., Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B., R., D. 79104 Freiburg i. B., R., Germany c. J. T., Bromley, N. H., Brook, P. J., Bussey, A. T., Doyle, D. H., Saxon, L. E., Sinclair, E., Strickland, M. L., Utley, R., Waugh, of Physics, A. S. Wilson D. e. p. t., Astronomy, University of, Glasgow, Glasgow G12, 8qq, U. K. o. A., Dannemann20, U., Holm, D., Horstmann, R., Sinkus21, K., Wick Hamburg University, Physics, I. Institute of E. x. p., D., 22761 Hamburg, Germany c. B. D., Burow22, L., Hagge16, E., Lohrmann, G., Poelz, W., Schott, F., Zetsche Hamburg University, Physics, I. I. Institute of E. x. p., Germany c. T. C., Bacon, N., Bru¨ mmer, I., Butterworth, V. L., Harri, G., Howell, B. H. Y., Hung, L., Lamberti23, K. R., Long, D. B., Miller, N., Pavel, A., Prinias24, J. K., Sedgbeer, D., Sideri, A. F., Whitfield Imperial College London, High Energy Nuclear Physics, Group, London SW7, 2bz, U. K. o. U., Mallik, M. Z., Wang, S. M., Wang, J. T., Wu University of Iowa, Physics, Astronomy, Dept, Iowa, City, Ia, 52242, USA p. P., Cloth, D., Filges Forschungszentrum Ju¨ lich, Institut fu¨ r., Kernphysik, D., 52405 Ju¨ lich, Germany S. H., An, G. H., Cho, B. J., Ko, S. B., Lee, S. W., Nam, H. S., Park, S. K., Park Korea University, Seoul 136, 701, Korea h. S., Kartik, H. J., Kim, R. R., Mcneil, W., Metcalf, V. K., Nadendla Louisiana State University, Baton, Rouge, LA 70803, 4001, USA p. F., Barreiro, J. P., Fernandez, R., Graciani, J. M., Herna´ndez, L., Herva´, L., Labarga, M., Martinez, J., del Peso, J., Puga, J., Terron, Auto´ noma Madrid, J. 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M., Botje, F., Chlebana, J., Engelen, M., de Kamp, P., Kooijman, A., Kruse, A., van Sighem, H., Tiecke, W., Verkerke, J., Vossebeld, M., Vreeswijk, L., Wigger, E., de Wolf, R., van Woudenberg27 NIKHEF, University of, Amsterdam, NL 1009 DB, Amsterdam, Netherlands i. D., Acosta, B., Bylsma, L. S., Durkin, J., Gilmore, C. M., Ginsburg, C. L., Kim, C., Li, T. Y., Ling, P., Nylander, I. H., Park, T. A., Romanowski28 Ohio State University, Physics, Department, Columbus, OH 43210, 1106, USA p. D. S., Bailey, R. J., Cashmore29, A. M., Cooper Sarkar, R. C. E., Devenish, N., Harnew, M., Lancaster30, L., Lindemann, J. D., Mcfall, C., Nath, V. A., Noyes24, A., Quadt, J. R., Tickner, H., Uijterwaal, R., Walczak, D. S., Water, F. F., Wilson, T., Yip Department of Physic, University of, Oxford, Oxford, U. K. o. A., Bertolin, R., Brugnera, R., Carlin, F., Dal Corso, M., De Giorgi, U., Dosselli, S., Limentani, M., Morandin, M., Posocco, L., Stanco, R., Stroili, C., Voci, F., Zuin Dipartimento di Fisica dell’ Universita, Infn, I., 35131 Padova, Italy f. J., Bulmahn, R. G., Feild31, B. Y., Oh, J. J., Whitmore Pennsylvania State University, University, Park, Pa, 16802, USA q. G., D’Agostini, G., Marini, A., Nigro Dipartimento di Fisica, ’La Sapienza’, U. n. i. v., I., 00185 Rome, Italy f. J. C., Hart, N. A., Mccubbin, T. P., Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11, 0qx, U. K. o. E., Barberi, T., Dubb, C., Heusch, M., Van Hook, W., Lockman, J. T., Rahn, H. F. W., Sadrozinski, A., Seiden, D. C., Williams University of California, Santa, Cruz, Ca, 93106, USA p. J., Biltzinger, R. J., Seifert, O., Schwarzer, A. H., Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D., 57012 Siegen, Germany c. H., Abramowicz, G., Briskin, S., Dagan32, T., Doeker32, A., Levy26 Raymond, Beverly Sackler Faculty of Exact, Science, School of, Physic, Tel Aviv, University, Tel Aviv, 69978, Israel e. J. I., Fleck33, M., Inuzuka, T., Ishii, M., Kuze, S., Mine, M., Nakao, I., Suzuki, K., Tokushuku, K., Umemori, S., Yamada, Y., Yamazaki Institute for Nuclear Study, University of, Tokyo, Tokyo, 113, Japan g. M., Chiba, R., Hamatsu, T., Hirose, K., Homma, S., Kitamura34, T., Matsushita, K., Yamauchi Tokyo Metropolitan University, Tokyo 192, 03, Japan g. R., Cirio, M., Costa, M. I., Ferrero, S., Maselli, C., Peroni, R., Sacchi, A., Solano, A., Staiano Universita di Torino, Dipartimento di Fisica, Sperimentale, I., 10129 Torino, Italy f. M., Dardo II Faculty of Science, Torino, University, Infn, Alessandria, Italy f. D. C., Bailey, F., Benard, M., Brkic, C. P., Fagerstroem, G. F., Hartner, K. K., Joo, G. M., Levman, J. F., Martin, R. S., Orr, S., Polenz, C. R., Sampson, D., Simmon, R. J., Teuscher University of Toronto, Toronto, ON M5S, 1a7, Canada a. J. M., Butterworth, C. D., Catterall, T. W., Jone, P. B., Kaziewicz, J. B., Lane, R. L., Saunder, J., Shulman, M. R., Sutton University College London, London WC1E, 6bt, U. K. o. B., Lu, L. W., Mo Virginia Polytechnic Inst, State, University, Physics, Dept, Blacksburg, Va, 24061, USA q. W., Bogusz, J., Ciborowski, J., Gajewski, G., Grzelak35, M., Kasprzak, M., Krzyz˙anowski, K., Muchorowski36, R. J., Nowak, J. M., Pawlak, T., Tymieniecka, A. K., Wro´ blewski, J. A., Zakrzewski, A. F., Z˙ arnecki Warsaw University, Institute of Experimental, Physic, PL 00681, Warsaw, Poland j. M., Adamus Institute for Nuclear Studie, Poland j. C., Coldewey, Y., Eisenberg32, D., Hochman, U., Karshon32, D., Revel32, D., Zer Zion Weizmann Institute, Nuclear Physics, Dept, Rehovot, 76100, Israel d. W. F., Badgett, J., Breitweg, D., Chapin, R., Cro, S., Dasu, C., Fouda, R. J., Lovele, S., Mattingly, D. D., Reeder, S., Silverstein, W. H., Smith, A., Vaiciuli, M., Wodarczyk University of Wisconsin, Madison, Wi, 53706, USA p. S., Bhadra, M. L., Cardy37, W. R., Frisken, M., Khakzad, W. B., Schmidke York University, North, York, Toronto ON M3J, 1p3, and Canada, A.
Abstract: Using the ZEUS detector at HERA, we have studied the reaction e(+) p --> e(+) X for Q(2) > 5000 GeV2 with a 20.1 pb(-1) data sample collected during the years 1994 to 1996. For Q(2) below 15000 GeV2, the data are in good agreement with Standard Model expectations. For Q(2) > 35000 GeV2, two events are observed while 0.145 +/- 0.013 events are expected. For x > 0.55 and y > 0.25, four events are observed where 0.91 +/- 0.08 events are expected. The observed excess above Standard Model expectations is particularly interesting because it occurs in a previously unexplored kinematic region.
Published: 1997

7. Leading baryons at low x(L) in DIS and photoproduction at ZEUS

Author: ZEUS Collaboration M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasin´ ski, J. Repond, R. Stanek, R. L. Ta laga, H. Zhang Argonne National Laboratory, Argonne, IL 60439, USA p. M. C. K. Mattingly Andrews University, Berrien Springs, USA F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini1, L. Cifarelli2, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, A. Polini, G. Sartorelli, Y. Zamora Garcia3, A. Zichichi University, INFN Bologna, I. 40126 Bologna, Italy f. C. Amelung, A. Bornheim, J. Crittenden, R. Deffner, M. Eckert, L. Feld, A. Frey4, M. Geerts5, M. Grothe, H. Hartmann, K. Heinloth, L. Heinz, E. Hilger, H. P. Jakob, U. F. Katz, S. Mengel6, E. Paul, M. Pfeiffer, C.h. Rembser, D. Schramm7, J. Stamm, R. Wedemeyer Physikalisches Institut der Universita¨t Bonn, D. 53115 Bonn, Germany c. S. Campbell Robson, A. Cassidy, W. N. Cottingham, N. Dyce, B. Foster, S. George, M. E. Hayes, G. P. Heath, H. F. Heath, D. Piccioni, D. G. Roff, R. J. Tapper, R. Yoshida H. H. Wills Physics Laboratory, University of Bristol, Bristol B58 1TL, U. K. o. M. Arneodo8, R. Ayad, M. Capua, A. Garfagnini, L. Iannotti, M. Schioppa, G. Susinno Calabria University, Physics D.e.p.t. and INFN, Cosenza, Italy f. A. Caldwell9, N. Cartiglia, Z. Jing, W. Liu, J. A. Parsons, S. Ritz10, F. Sciulli, P. B. Straub, L. Wai11, S. Yang12, Q. Zhu Columbia University, Nevis Labs, Irvington on Hudson, NY 10533, USA q. P. Borzemski, J. Chwastowski, A. Eskreys, Z. Jakubowski, M. B. Przybycien´, M. Zachara, L. Zawiejski I.n.s.t. of Nuclear Physics, PL 30055 Cracow, Poland j. L. Adamczyk, B. Bednarek, K. Jelen´, D. Kisielewska, T. Kowalski, M. Przybycien´, E. Rulikowska Zare¸bska, L. Suszycki, J. Zaja¸c Faculty of Physics, Nuclear Techniques, Academy of Mining, Metallurgy, Poland j. Z. Dulin´ ski, A. Kotan´ ski Jagellonian Univ, D.e.p.t. of Physics, PL 30059 Cracow, Poland k. G. Abbiendi13, L. A. T. Bauerdick, U. Behrens, H. Beier, J. K. Bienlein, G. Cases, O. Deppe, K. Desler, G. Drews, M. Flasin´ ski14, D. J. Gilkinson, C. Glasman, P. Go¨ ttlicher, J. Große Knetter, T. Haas, W. Hain, D. Hasell, H. Heßling, Y. Iga, K. F. Johnson15, P. Joos, M. Kasemann, R. Klanner, W. Koch, U. Ko¨ tz, H. Kowalski, J. Labs, A. Ladage, B. Lo¨ hr, M. Lo¨ we, D. Lu¨ ke, J. Mainusch16, O. Man´ czak, J. Milewski, T. Monteiro17, J. S. T. Ng, D. Notz, K. Ohrenberg, K. Piotrzkowski, M. Roco, M. Rohde, J. Rolda´n, U. Schneekloth, W. Schulz, F. Selonke, B. Surrow, E. Tassi, T. Voß, D. Westphal, G. Wolf, U. Wollmer, C. Youngman, W. Zeuner Deutsches Elektronen Synchrotron DESY, D. 22603 Hamburg, Germany H. J. Grabosch, A. Meyer, S. Schlenstedt DESY IfH Zeuthen, D. 15738 Zeuthen, Germany G. Barbagli, E. Gallo, P. Pelfer University, INFN, Florence, Italy f. G. Maccarrone, S. De Pasquale, L. Votano INFN, Laboratori Nazionali di Frascati, I. 00044 Frascati, Italy f. A. Bamberger, S. Eisenhardt, T. Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B.r., D. 79104 Freiburg i. B.r., Germany c. J. T. Bromley, N. H. Brook, P. J. Bussey, A. T. Doyle, D. H. Saxon, L. E. Sinclair, E. Strickland, M. L. Utley, R. Waugh, A. S. Wilson D.e.p.t. of Physics, Astronomy, University of Glasgow, Glasgow G12 8QQ, U. K. o. A. Dannemann20, U. Holm, D. Horstmann, R. Sinkus21, K. Wick Hamburg University, I. Institute of E.x.p. Physics, D. 22761 Hamburg, Germany c. B. D. Burow22, L. Hagge16, E. Lohrmann, G. Poelz, W. Schott, F. Zetsche Hamburg University, I.I. Institute of E.x.p. Physics, Germany c. T. C. Bacon, N. Bru¨ mmer, I. Butterworth, V. L. Harris, G. Howell, B. H. Y. Hung, L. Lamberti23, K. R. Long, D. B. Miller, N. Pavel, A. Prinias24, J. K. Sedgbeer, D. Sideris, A. F. Whitfield Imperial College London, High Energy Nuclear Physics Group, London SW7 2BZ, U. K. o. U. Mallik, M. Z. Wang, S. M. Wang, J. T. Wu University of Iowa, Physics, Astronomy Dept, Iowa City, IA 52242, USA p. P. Cloth, D. Filges Forschungszentrum Ju¨ lich, Institut fu¨ r. Kernphysik, D. 52405 Ju¨ lich, Germany S. H. An, G. H. Cho, B. J. Ko, S. B. Lee, S. W. Nam, H. S. Park, S. K. Park Korea University, Seoul 136 701, Korea h. S. Kartik, H. J. Kim, R. R. McNeil, W. Metcalf, V. K. Nadendla Louisiana State University, Baton Rouge, LA 70803 4001, USA p. F. Barreiro, J. P. Fernandez, R. Graciani, J. M. Herna´ndez, L. Herva´s, L. Labarga, M. Martinez, J. del Peso, J. Puga, J. Terron, J. F. de Troco´ niz U.n.i.v.e.r. Auto´ noma Madrid, Depto de F´ısica Teo´ r´ıca, E. 28049 Madrid, Spain n. F. Corriveau, D. S. Hanna, J. Hartmann, L. W. Hung, J. N. Lim, C. G. Matthews25, W. N. Murray, A. Ochs, P. M. Patel, M. Riveline, D. G. Stairs, M. St Laurent, R. Ullmann, G. Zacek25 McGill University, Montre´al, PQ H3A 2T8, Canada a, b. T. Tsurugai Meiji Gakuin University, Faculty of General Education, Yokohama 244, Japan V. Bashkirov, B. A. Dolgoshein, A. Stifutkin Moscow Engineering Physics Institute, RU 115 409 Moscow, Russia l. G. L. Bashindzhagyan26, P. F. Ermolov, L. K. Gladilin, Y.u. A. Golubkov, V. D. Kobrin, I. A. Korzhavina, V. A. Kuzmin, O. Y.u. Lukina, A. S. Proskuryakov, A. A. Savin, L. M. Shcheglova, A. N. Solomin, N. P. Zotov Moscow State University, Institute of Nuclear Physics, RU 119 899 Moscow, Russia m. M. Botje, F. Chlebana, J. Engelen, M. de Kamps, P. Kooijman, A. Kruse, A. van Sighem, H. Tiecke, W. Verkerke, J. Vossebeld, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg27 NIKHEF, University of Amsterdam, NL 1009 DB Amsterdam, Netherlands i. D. Acosta, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, C. Li, T. Y. Ling, P. Nylander, I. H. Park, T. A. Romanowski28 Ohio State University, Physics Department, Columbus, OH 43210 1106, USA p. D. S. Bailey, R. J. Cashmore29, A. M. Cooper Sarkar, R. C. E. Devenish, N. Harnew, M. Lancaster30, L. Lindemann, J. D. McFall, C. Nath, V. A. Noyes24, A. Quadt, J. R. Tickner, H. Uijterwaal, R. Walczak, D. S. Waters, F. F. Wilson, T. Yip Department of Physics, University of Oxford, Oxford, U. K. o. A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, F. Zuin Dipartimento di Fisica dell’ Universita, INFN, I. 35131 Padova, Italy f. J. Bulmahn, R. G. Feild31, B. Y. Oh, J. J. Whitmore Pennsylvania State University, University Park, PA 16802, USA q. G. D’Agostini, G. Marini, A. Nigro Dipartimento di Fisica, U.n.i.v. ’La Sapienza’, I. 00185 Rome, Italy f. J. C. Hart, N. A. McCubbin, T. P. Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U. K. o. E. Barberis, T. Dubbs, C. Heusch, M. Van Hook, W. Lockman, J. T. Rahn, H. F. W. Sadrozinski, A. Seiden, D. C. Williams University of California, Santa Cruz, CA 93106, USA p. J. Biltzinger, R. J. Seifert, O. Schwarzer, A. H. Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D. 57012 Siegen, Germany c. H. Abramowicz, G. Briskin, S. Dagan32, T. Doeker32, A. Levy26 Raymond, Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv 69978, Israel e. J. I. Fleck33, M. Inuzuka, T. Ishii, M. Kuze, S. Mine, M. Nakao, I. Suzuki, K. Tokushuku, K. Umemori, S. Yamada, Y. Yamazaki Institute for Nuclear Study, University of Tokyo, Tokyo 113, Japan g. M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura34, T. Matsushita, K. Yamauchi Tokyo Metropolitan University, Tokyo 192 03, Japan g. R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano Universita di Torino, Dipartimento di Fisica Sperimentale, I. 10129 Torino, Italy f. M. Dardo II Faculty of Sciences, Torino University, INFN Alessandria, Italy f. D. C. Bailey, F. Benard, M. Brkic, C. P. Fagerstroem, G. F. Hartner, K. K. Joo, G. M. Levman, J. F. Martin, R. S. Orr, S. Polenz, C. R. Sampson, D. Simmons, R. J. Teuscher University of Toronto, Toronto, ON M5S 1A7, Canada a. J. M. Butterworth, C. D. Catterall, T. W. Jones, P. B. Kaziewicz, J. B. Lane, R. L. Saunders, J. Shulman, M. R. Sutton University College London, London WC1E 6BT, U. K. o. B. Lu, L. W. Mo Virginia Polytechnic Inst, State University, Physics Dept, Blacksburg, VA 24061, USA q. W. Bogusz, J. Ciborowski, J. Gajewski, G. Grzelak35, M. Kasprzak, M. Krzyz˙anowski, K. Muchorowski36, R. J. Nowak, J. M. Pawlak, T. Tymieniecka, A. K. Wro´ blewski, J. A. Zakrzewski, A. F. Z˙ arnecki Warsaw University, Institute of Experimental Physics, PL 00681 Warsaw, Poland j. M. Adamus Institute for Nuclear Studies, Poland j. C. Coldewey, Y. Eisenberg32, D. Hochman, U. Karshon32, D. Revel32, D. Zer Zion Weizmann Institute, Nuclear Physics Dept, Rehovot 76100, Israel d. W. F. Badgett, J. Breitweg, D. Chapin, R. Cross, S. Dasu, C. Foudas, R. J. Loveless, S. Mattingly, D. D. Reeder, S. Silverstein, W. H. Smith, A. Vaiciulis, M. Wodarczyk University of Wisconsin, Madison, WI 53706, USA p. S. Bhadra, M. L. Cardy37, W. R. Frisken, M. Khakzad, W. B. Schmidke York University, North York, Toronto ON M3J 1P3, Canada a., MARI, Stefano Maria, ZEUS Collaboration M., Derrick, D., Krakauer, S., Magill, D., Mikuna, B., Musgrave, J. R., Okrasin´ ski, J., Repond, R., Stanek, R. L., Ta laga, H., Zhang Argonne National Laboratory, Argonne, Il, 60439, USA p. M. C. K., Mattingly Andrews University, Berrien, Spring, Mi, USA F., Anselmo, P., Antonioli, G., Bari, M., Basile, L., Bellagamba, D., Boscherini, A., Bruni, G., Bruni, P., Bruni, G., Cara Romeo, G., Castellini1, L., Cifarelli2, F., Cindolo, A., Contin, M., Corradi, I., Giala, P., Giusti, G., Iacobucci, G., Laurenti, G., Levi, A., Margotti, T., Massam, R., Nania, F., Palmonari, A., Pesci, A., Polini, G., Sartorelli, Y., Zamora Garcia3, A., Zichichi University, Infn, Bologna, I., 40126 Bologna, Italy f. C., Amelung, A., Bornheim, J., Crittenden, R., Deffner, M., Eckert, L., Feld, A., Frey4, M., Geerts5, M., Grothe, H., Hartmann, K., Heinloth, L., Heinz, E., Hilger, H. P., Jakob, U. F., Katz, S., Mengel6, E., Paul, M., Pfeiffer, Rembser, C. h., D., Schramm7, J., Stamm, R., Wedemeyer Physikalisches Institut der Universita¨t Bonn, D., 53115 Bonn, Germany c. S., Campbell Robson, A., Cassidy, W. N., Cottingham, N., Dyce, B., Foster, S., George, M. E., Haye, G. P., Heath, H. F., Heath, D., Piccioni, D. G., Roff, R. J., Tapper, R. Yoshida H. H., Wills Physics Laboratory, University of, Bristol, Bristol B58, 1tl, U. K. o. M., Arneodo8, R., Ayad, M., Capua, A., Garfagnini, L., Iannotti, M., Schioppa, G., Susinno Calabria University, and INFN, Physics D. e. p. t., Cosenza, Italy f. A., Caldwell9, N., Cartiglia, Z., Jing, W., Liu, J. A., Parson, S., Ritz10, F., Sciulli, P. B., Straub, L., Wai11, S., Yang12, Q., Zhu Columbia University, Nevis, Lab, Irvington on, Hudson, Ny, 10533, USA q. P., Borzemski, J., Chwastowski, A., Eskrey, Z., Jakubowski, M. B., Przybycien´, M., Zachara, of Nuclear Physics, L. Zawiejski I. n. s. t., PL 30055, Cracow, Poland j. L., Adamczyk, B., Bednarek, K., Jelen´, D., Kisielewska, T., Kowalski, M., Przybycien´, E., Rulikowska Zare¸bska, L., Suszycki, J., Zaja¸c Faculty of Physic, Nuclear, Technique, Academy of, Mining, Metallurgy, Poland j. Z., Dulin´ ski, A., Kotan´ ski Jagellonian Univ, of Physics, D. e. p. t., PL 30059, Cracow, Poland k. G., Abbiendi13, L. A. T., Bauerdick, U., Behren, H., Beier, J. K., Bienlein, G., Case, O., Deppe, K., Desler, G., Drew, M., Flasin´ ski14, D. J., Gilkinson, C., Glasman, P., Go¨ ttlicher, J., Große Knetter, T., Haa, W., Hain, D., Hasell, H., Heßling, Y., Iga, K. F., Johnson15, P., Joo, M., Kasemann, R., Klanner, W., Koch, U., Ko¨ tz, H., Kowalski, J., Lab, A., Ladage, B., Lo¨ hr, M., Lo¨ we, D., Lu¨ ke, J., Mainusch16, O., Man´ czak, J., Milewski, T., Monteiro17, J. S. T., Ng, D., Notz, K., Ohrenberg, K., Piotrzkowski, M., Roco, M., Rohde, J., Rolda´n, U., Schneekloth, W., Schulz, F., Selonke, B., Surrow, E., Tassi, T., Voß, D., Westphal, G., Wolf, U., Wollmer, C., Youngman, W., Zeuner Deutsches Elektronen Synchrotron DESY, D., 22603 Hamburg, Germany H. J., Grabosch, Mari, Stefano Maria, A., Meyer, S., Schlenstedt DESY IfH Zeuthen, D., 15738 Zeuthen, Germany G., Barbagli, E., Gallo, P., Pelfer University, Infn, Florence, Italy f. G., Maccarrone, S., De Pasquale, L., Votano INFN, Laboratori Nazionali di, Frascati, I., 00044 Frascati, Italy f. A., Bamberger, S., Eisenhardt, T., Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B., R., D. 79104 Freiburg i. B., R., Germany c. J. T., Bromley, N. H., Brook, P. J., Bussey, A. T., Doyle, D. H., Saxon, L. E., Sinclair, E., Strickland, M. L., Utley, R., Waugh, of Physics, A. S. Wilson D. e. p. t., Astronomy, University of, Glasgow, Glasgow G12, 8qq, U. K. o. A., Dannemann20, U., Holm, D., Horstmann, R., Sinkus21, K., Wick Hamburg University, Physics, I. Institute of E. x. p., D., 22761 Hamburg, Germany c. B. D., Burow22, L., Hagge16, E., Lohrmann, G., Poelz, W., Schott, F., Zetsche Hamburg University, Physics, I. I. Institute of E. x. p., Germany c. T. C., Bacon, N., Bru¨ mmer, I., Butterworth, V. L., Harri, G., Howell, B. H. Y., Hung, L., Lamberti23, K. R., Long, D. B., Miller, N., Pavel, A., Prinias24, J. K., Sedgbeer, D., Sideri, A. F., Whitfield Imperial College London, High Energy Nuclear Physics, Group, London SW7, 2bz, U. K. o. U., Mallik, M. Z., Wang, S. M., Wang, J. T., Wu University of Iowa, Physics, Astronomy, Dept, Iowa, City, Ia, 52242, USA p. P., Cloth, D., Filges Forschungszentrum Ju¨ lich, Institut fu¨ r., Kernphysik, D., 52405 Ju¨ lich, Germany S. H., An, G. H., Cho, B. J., Ko, S. B., Lee, S. W., Nam, H. S., Park, S. K., Park Korea University, Seoul 136, 701, Korea h. S., Kartik, H. J., Kim, R. R., Mcneil, W., Metcalf, V. K., Nadendla Louisiana State University, Baton, Rouge, LA 70803, 4001, USA p. F., Barreiro, J. P., Fernandez, R., Graciani, J. M., Herna´ndez, L., Herva´, L., Labarga, M., Martinez, J., del Peso, J., Puga, J., Terron, Auto´ noma Madrid, J. F. de Troco´ niz U. n. i. v. e. r., Depto de F´ısica Teo´, R´ıca, E., 28049 Madrid, Spain n. F., Corriveau, D. S., Hanna, J., Hartmann, L. W., Hung, J. N., Lim, C. G., Matthews25, W. N., Murray, A., Och, P. M., Patel, M., Riveline, D. G., Stair, M., St Laurent, R., Ullmann, G., Zacek25 McGill University, Montre´al, PQ H3A, 2t8, Canada, A, b. T., Tsurugai Meiji Gakuin University, Faculty of General, Education, Yokohama, 244, Japan V., Bashkirov, B. A., Dolgoshein, A., Stifutkin Moscow Engineering Physics Institute, RU 115 409, Moscow, Russia l. G. L., Bashindzhagyan26, P. F., Ermolov, L. K., Gladilin, Golubkov, Y. u. A., V. D., Kobrin, I. A., Korzhavina, V. A., Kuzmin, Lukina, O. Y. u., A. S., Proskuryakov, A. A., Savin, L. M., Shcheglova, A. N., Solomin, N. P., Zotov Moscow State University, Institute of Nuclear, Physic, RU 119 899, Moscow, Russia m. M., Botje, F., Chlebana, J., Engelen, M., de Kamp, P., Kooijman, A., Kruse, A., van Sighem, H., Tiecke, W., Verkerke, J., Vossebeld, M., Vreeswijk, L., Wigger, E., de Wolf, R., van Woudenberg27 NIKHEF, University of, Amsterdam, NL 1009 DB, Amsterdam, Netherlands i. D., Acosta, B., Bylsma, L. S., Durkin, J., Gilmore, C. M., Ginsburg, C. L., Kim, C., Li, T. Y., Ling, P., Nylander, I. H., Park, T. A., Romanowski28 Ohio State University, Physics, Department, Columbus, OH 43210, 1106, USA p. D. S., Bailey, R. J., Cashmore29, A. M., Cooper Sarkar, R. C. E., Devenish, N., Harnew, M., Lancaster30, L., Lindemann, J. D., Mcfall, C., Nath, V. A., Noyes24, A., Quadt, J. R., Tickner, H., Uijterwaal, R., Walczak, D. S., Water, F. F., Wilson, T., Yip Department of Physic, University of, Oxford, Oxford, U. K. o. A., Bertolin, R., Brugnera, R., Carlin, F., Dal Corso, M., De Giorgi, U., Dosselli, S., Limentani, M., Morandin, M., Posocco, L., Stanco, R., Stroili, C., Voci, F., Zuin Dipartimento di Fisica dell’ Universita, Infn, I., 35131 Padova, Italy f. J., Bulmahn, R. G., Feild31, B. Y., Oh, J. J., Whitmore Pennsylvania State University, University, Park, Pa, 16802, USA q. G., D’Agostini, G., Marini, A., Nigro Dipartimento di Fisica, ’La Sapienza’, U. n. i. v., I., 00185 Rome, Italy f. J. C., Hart, N. A., Mccubbin, T. P., Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11, 0qx, U. K. o. E., Barberi, T., Dubb, C., Heusch, M., Van Hook, W., Lockman, J. T., Rahn, H. F. W., Sadrozinski, A., Seiden, D. C., Williams University of California, Santa, Cruz, Ca, 93106, USA p. J., Biltzinger, R. J., Seifert, O., Schwarzer, A. H., Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D., 57012 Siegen, Germany c. H., Abramowicz, G., Briskin, S., Dagan32, T., Doeker32, A., Levy26 Raymond, Beverly Sackler Faculty of Exact, Science, School of, Physic, Tel Aviv, University, Tel Aviv, 69978, Israel e. J. I., Fleck33, M., Inuzuka, T., Ishii, M., Kuze, S., Mine, M., Nakao, I., Suzuki, K., Tokushuku, K., Umemori, S., Yamada, Y., Yamazaki Institute for Nuclear Study, University of, Tokyo, Tokyo, 113, Japan g. M., Chiba, R., Hamatsu, T., Hirose, K., Homma, S., Kitamura34, T., Matsushita, K., Yamauchi Tokyo Metropolitan University, Tokyo 192, 03, Japan g. R., Cirio, M., Costa, M. I., Ferrero, S., Maselli, C., Peroni, R., Sacchi, A., Solano, A., Staiano Universita di Torino, Dipartimento di Fisica, Sperimentale, I., 10129 Torino, Italy f. M., Dardo II Faculty of Science, Torino, University, Infn, Alessandria, Italy f. D. C., Bailey, F., Benard, M., Brkic, C. P., Fagerstroem, G. F., Hartner, K. K., Joo, G. M., Levman, J. F., Martin, R. S., Orr, S., Polenz, C. R., Sampson, D., Simmon, R. J., Teuscher University of Toronto, Toronto, ON M5S, 1a7, Canada a. J. M., Butterworth, C. D., Catterall, T. W., Jone, P. B., Kaziewicz, J. B., Lane, R. L., Saunder, J., Shulman, M. R., Sutton University College London, London WC1E, 6bt, U. K. o. B., Lu, L. W., Mo Virginia Polytechnic Inst, State, University, Physics, Dept, Blacksburg, Va, 24061, USA q. W., Bogusz, J., Ciborowski, J., Gajewski, G., Grzelak35, M., Kasprzak, M., Krzyz˙anowski, K., Muchorowski36, R. J., Nowak, J. M., Pawlak, T., Tymieniecka, A. K., Wro´ blewski, J. A., Zakrzewski, A. F., Z˙ arnecki Warsaw University, Institute of Experimental, Physic, PL 00681, Warsaw, Poland j. M., Adamus Institute for Nuclear Studie, Poland j. C., Coldewey, Y., Eisenberg32, D., Hochman, U., Karshon32, D., Revel32, D., Zer Zion Weizmann Institute, Nuclear Physics, Dept, Rehovot, 76100, Israel d. W. F., Badgett, J., Breitweg, D., Chapin, R., Cro, S., Dasu, C., Fouda, R. J., Lovele, S., Mattingly, D. D., Reeder, S., Silverstein, W. H., Smith, A., Vaiciuli, M., Wodarczyk University of Wisconsin, Madison, Wi, 53706, USA p. S., Bhadra, M. L., Cardy37, W. R., Frisken, M., Khakzad, W. B., Schmidke York University, North, York, Toronto ON M3J, 1p3, and Canada, A.
Abstract: Results obtained by the ZEUS collaboration on leading baryon production in the proton fragmentation region are presented. The reaction gamma p --> NX, with N a proton or a neutron, is examined both at low and high photon virtuality.
Published: 1997

8. Forward transverse energy flow and forward jets at low x

Author: ZEUS Collaboration M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasin´ ski, J. Repond, R. Stanek, R. L. Ta laga, H. Zhang Argonne National Laboratory, Argonne, IL 60439, USA p. M. C. K. Mattingly Andrews University, Berrien Springs, USA F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini1, L. Cifarelli2, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, A. Polini, G. Sartorelli, Y. Zamora Garcia3, A. Zichichi University, INFN Bologna, I. 40126 Bologna, Italy f. C. Amelung, A. Bornheim, J. Crittenden, R. Deffner, M. Eckert, L. Feld, A. Frey4, M. Geerts5, M. Grothe, H. Hartmann, K. Heinloth, L. Heinz, E. Hilger, H. P. Jakob, U. F. Katz, S. Mengel6, E. Paul, M. Pfeiffer, C.h. Rembser, D. Schramm7, J. Stamm, R. Wedemeyer Physikalisches Institut der Universita¨t Bonn, D. 53115 Bonn, Germany c. S. Campbell Robson, A. Cassidy, W. N. Cottingham, N. Dyce, B. Foster, S. George, M. E. Hayes, G. P. Heath, H. F. Heath, D. Piccioni, D. G. Roff, R. J. Tapper, R. Yoshida H. H. Wills Physics Laboratory, University of Bristol, Bristol B58 1TL, U. K. o. M. Arneodo8, R. Ayad, M. Capua, A. Garfagnini, L. Iannotti, M. Schioppa, G. Susinno Calabria University, Physics D.e.p.t. and INFN, Cosenza, Italy f. A. Caldwell9, N. Cartiglia, Z. Jing, W. Liu, J. A. Parsons, S. Ritz10, F. Sciulli, P. B. Straub, L. Wai11, S. Yang12, Q. Zhu Columbia University, Nevis Labs, Irvington on Hudson, NY 10533, USA q. P. Borzemski, J. Chwastowski, A. Eskreys, Z. Jakubowski, M. B. Przybycien´, M. Zachara, L. Zawiejski I.n.s.t. of Nuclear Physics, PL 30055 Cracow, Poland j. L. Adamczyk, B. Bednarek, K. Jelen´, D. Kisielewska, T. Kowalski, M. Przybycien´, E. Rulikowska Zare¸bska, L. Suszycki, J. Zaja¸c Faculty of Physics, Nuclear Techniques, Academy of Mining, Metallurgy, Poland j. Z. Dulin´ ski, A. Kotan´ ski Jagellonian Univ, D.e.p.t. of Physics, PL 30059 Cracow, Poland k. G. Abbiendi13, L. A. T. Bauerdick, U. Behrens, H. Beier, J. K. Bienlein, G. Cases, O. Deppe, K. Desler, G. Drews, M. Flasin´ ski14, D. J. Gilkinson, C. Glasman, P. Go¨ ttlicher, J. Große Knetter, T. Haas, W. Hain, D. Hasell, H. Heßling, Y. Iga, K. F. Johnson15, P. Joos, M. Kasemann, R. Klanner, W. Koch, U. Ko¨ tz, H. Kowalski, J. Labs, A. Ladage, B. Lo¨ hr, M. Lo¨ we, D. Lu¨ ke, J. Mainusch16, O. Man´ czak, J. Milewski, T. Monteiro17, J. S. T. Ng, D. Notz, K. Ohrenberg, K. Piotrzkowski, M. Roco, M. Rohde, J. Rolda´n, U. Schneekloth, W. Schulz, F. Selonke, B. Surrow, E. Tassi, T. Voß, D. Westphal, G. Wolf, U. Wollmer, C. Youngman, W. Zeuner Deutsches Elektronen Synchrotron DESY, D. 22603 Hamburg, Germany H. J. Grabosch, A. Meyer, S. Schlenstedt DESY IfH Zeuthen, D. 15738 Zeuthen, Germany G. Barbagli, E. Gallo, P. Pelfer University, INFN, Florence, Italy f. G. Maccarrone, S. De Pasquale, L. Votano INFN, Laboratori Nazionali di Frascati, I. 00044 Frascati, Italy f. A. Bamberger, S. Eisenhardt, T. Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B.r., D. 79104 Freiburg i. B.r., Germany c. J. T. Bromley, N. H. Brook, P. J. Bussey, A. T. Doyle, D. H. Saxon, L. E. Sinclair, E. Strickland, M. L. Utley, R. Waugh, A. S. Wilson D.e.p.t. of Physics, Astronomy, University of Glasgow, Glasgow G12 8QQ, U. K. o. A. Dannemann20, U. Holm, D. Horstmann, R. Sinkus21, K. Wick Hamburg University, I. Institute of E.x.p. Physics, D. 22761 Hamburg, Germany c. B. D. Burow22, L. Hagge16, E. Lohrmann, G. Poelz, W. Schott, F. Zetsche Hamburg University, I.I. Institute of E.x.p. Physics, Germany c. T. C. Bacon, N. Bru¨ mmer, I. Butterworth, V. L. Harris, G. Howell, B. H. Y. Hung, L. Lamberti23, K. R. Long, D. B. Miller, N. Pavel, A. Prinias24, J. K. Sedgbeer, D. Sideris, A. F. Whitfield Imperial College London, High Energy Nuclear Physics Group, London SW7 2BZ, U. K. o. U. Mallik, M. Z. Wang, S. M. Wang, J. T. Wu University of Iowa, Physics, Astronomy Dept, Iowa City, IA 52242, USA p. P. Cloth, D. Filges Forschungszentrum Ju¨ lich, Institut fu¨ r. Kernphysik, D. 52405 Ju¨ lich, Germany S. H. An, G. H. Cho, B. J. Ko, S. B. Lee, S. W. Nam, H. S. Park, S. K. Park Korea University, Seoul 136 701, Korea h. S. Kartik, H. J. Kim, R. R. McNeil, W. Metcalf, V. K. Nadendla Louisiana State University, Baton Rouge, LA 70803 4001, USA p. F. Barreiro, J. P. Fernandez, R. Graciani, J. M. Herna´ndez, L. Herva´s, L. Labarga, M. Martinez, J. del Peso, J. Puga, J. Terron, J. F. de Troco´ niz U.n.i.v.e.r. Auto´ noma Madrid, Depto de F´ısica Teo´ r´ıca, E. 28049 Madrid, Spain n. F. Corriveau, D. S. Hanna, J. Hartmann, L. W. Hung, J. N. Lim, C. G. Matthews25, W. N. Murray, A. Ochs, P. M. Patel, M. Riveline, D. G. Stairs, M. St Laurent, R. Ullmann, G. Zacek25 McGill University, Montre´al, PQ H3A 2T8, Canada a, b. T. Tsurugai Meiji Gakuin University, Faculty of General Education, Yokohama 244, Japan V. Bashkirov, B. A. Dolgoshein, A. Stifutkin Moscow Engineering Physics Institute, RU 115 409 Moscow, Russia l. G. L. Bashindzhagyan26, P. F. Ermolov, L. K. Gladilin, Y.u. A. Golubkov, V. D. Kobrin, I. A. Korzhavina, V. A. Kuzmin, O. Y.u. Lukina, A. S. Proskuryakov, A. A. Savin, L. M. Shcheglova, A. N. Solomin, N. P. Zotov Moscow State University, Institute of Nuclear Physics, RU 119 899 Moscow, Russia m. M. Botje, F. Chlebana, J. Engelen, M. de Kamps, P. Kooijman, A. Kruse, A. van Sighem, H. Tiecke, W. Verkerke, J. Vossebeld, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg27 NIKHEF, University of Amsterdam, NL 1009 DB Amsterdam, Netherlands i. D. Acosta, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, C. Li, T. Y. Ling, P. Nylander, I. H. Park, T. A. Romanowski28 Ohio State University, Physics Department, Columbus, OH 43210 1106, USA p. D. S. Bailey, R. J. Cashmore29, A. M. Cooper Sarkar, R. C. E. Devenish, N. Harnew, M. Lancaster30, L. Lindemann, J. D. McFall, C. Nath, V. A. Noyes24, A. Quadt, J. R. Tickner, H. Uijterwaal, R. Walczak, D. S. Waters, F. F. Wilson, T. Yip Department of Physics, University of Oxford, Oxford, U. K. o. A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, F. Zuin Dipartimento di Fisica dell’ Universita, INFN, I. 35131 Padova, Italy f. J. Bulmahn, R. G. Feild31, B. Y. Oh, J. J. Whitmore Pennsylvania State University, University Park, PA 16802, USA q. G. D’Agostini, G. Marini, A. Nigro Dipartimento di Fisica, U.n.i.v. ’La Sapienza’, I. 00185 Rome, Italy f. J. C. Hart, N. A. McCubbin, T. P. Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U. K. o. E. Barberis, T. Dubbs, C. Heusch, M. Van Hook, W. Lockman, J. T. Rahn, H. F. W. Sadrozinski, A. Seiden, D. C. Williams University of California, Santa Cruz, CA 93106, USA p. J. Biltzinger, R. J. Seifert, O. Schwarzer, A. H. Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D. 57012 Siegen, Germany c. H. Abramowicz, G. Briskin, S. Dagan32, T. Doeker32, A. Levy26 Raymond, Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv 69978, Israel e. J. I. Fleck33, M. Inuzuka, T. Ishii, M. Kuze, S. Mine, M. Nakao, I. Suzuki, K. Tokushuku, K. Umemori, S. Yamada, Y. Yamazaki Institute for Nuclear Study, University of Tokyo, Tokyo 113, Japan g. M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura34, T. Matsushita, K. Yamauchi Tokyo Metropolitan University, Tokyo 192 03, Japan g. R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano Universita di Torino, Dipartimento di Fisica Sperimentale, I. 10129 Torino, Italy f. M. Dardo II Faculty of Sciences, Torino University, INFN Alessandria, Italy f. D. C. Bailey, F. Benard, M. Brkic, C. P. Fagerstroem, G. F. Hartner, K. K. Joo, G. M. Levman, J. F. Martin, R. S. Orr, S. Polenz, C. R. Sampson, D. Simmons, R. J. Teuscher University of Toronto, Toronto, ON M5S 1A7, Canada a. J. M. Butterworth, C. D. Catterall, T. W. Jones, P. B. Kaziewicz, J. B. Lane, R. L. Saunders, J. Shulman, M. R. Sutton University College London, London WC1E 6BT, U. K. o. B. Lu, L. W. Mo Virginia Polytechnic Inst, State University, Physics Dept, Blacksburg, VA 24061, USA q. W. Bogusz, J. Ciborowski, J. Gajewski, G. Grzelak35, M. Kasprzak, M. Krzyz˙anowski, K. Muchorowski36, R. J. Nowak, J. M. Pawlak, T. Tymieniecka, A. K. Wro´ blewski, J. A. Zakrzewski, A. F. Z˙ arnecki Warsaw University, Institute of Experimental Physics, PL 00681 Warsaw, Poland j. M. Adamus Institute for Nuclear Studies, Poland j. C. Coldewey, Y. Eisenberg32, D. Hochman, U. Karshon32, D. Revel32, D. Zer Zion Weizmann Institute, Nuclear Physics Dept, Rehovot 76100, Israel d. W. F. Badgett, J. Breitweg, D. Chapin, R. Cross, S. Dasu, C. Foudas, R. J. Loveless, S. Mattingly, D. D. Reeder, S. Silverstein, W. H. Smith, A. Vaiciulis, M. Wodarczyk University of Wisconsin, Madison, WI 53706, USA p. S. Bhadra, M. L. Cardy37, W. R. Frisken, M. Khakzad, W. B. Schmidke York University, North York, Toronto ON M3J 1P3, Canada a., MARI, Stefano Maria, ZEUS Collaboration M., Derrick, D., Krakauer, S., Magill, D., Mikuna, B., Musgrave, J. R., Okrasin´ ski, J., Repond, R., Stanek, R. L., Ta laga, H., Zhang Argonne National Laboratory, Argonne, Il, 60439, USA p. M. C. K., Mattingly Andrews University, Berrien, Spring, Mi, USA F., Anselmo, P., Antonioli, G., Bari, M., Basile, L., Bellagamba, D., Boscherini, A., Bruni, G., Bruni, P., Bruni, G., Cara Romeo, G., Castellini1, L., Cifarelli2, F., Cindolo, A., Contin, M., Corradi, I., Giala, P., Giusti, G., Iacobucci, G., Laurenti, G., Levi, A., Margotti, T., Massam, R., Nania, F., Palmonari, A., Pesci, A., Polini, G., Sartorelli, Y., Zamora Garcia3, A., Zichichi University, Infn, Bologna, I., 40126 Bologna, Italy f. C., Amelung, A., Bornheim, J., Crittenden, R., Deffner, M., Eckert, L., Feld, A., Frey4, M., Geerts5, M., Grothe, H., Hartmann, K., Heinloth, L., Heinz, E., Hilger, H. P., Jakob, U. F., Katz, S., Mengel6, E., Paul, M., Pfeiffer, Rembser, C. h., D., Schramm7, J., Stamm, R., Wedemeyer Physikalisches Institut der Universita¨t Bonn, D., 53115 Bonn, Germany c. S., Campbell Robson, A., Cassidy, W. N., Cottingham, N., Dyce, B., Foster, S., George, M. E., Haye, G. P., Heath, H. F., Heath, D., Piccioni, D. G., Roff, R. J., Tapper, R. Yoshida H. H., Wills Physics Laboratory, University of, Bristol, Bristol B58, 1tl, U. K. o. M., Arneodo8, R., Ayad, M., Capua, A., Garfagnini, L., Iannotti, M., Schioppa, G., Susinno Calabria University, and INFN, Physics D. e. p. t., Cosenza, Italy f. A., Caldwell9, N., Cartiglia, Z., Jing, W., Liu, J. A., Parson, S., Ritz10, F., Sciulli, P. B., Straub, L., Wai11, S., Yang12, Q., Zhu Columbia University, Nevis, Lab, Irvington on, Hudson, Ny, 10533, USA q. P., Borzemski, J., Chwastowski, A., Eskrey, Z., Jakubowski, M. B., Przybycien´, M., Zachara, of Nuclear Physics, L. Zawiejski I. n. s. t., PL 30055, Cracow, Poland j. L., Adamczyk, B., Bednarek, K., Jelen´, D., Kisielewska, T., Kowalski, M., Przybycien´, E., Rulikowska Zare¸bska, L., Suszycki, J., Zaja¸c Faculty of Physic, Nuclear, Technique, Academy of, Mining, Metallurgy, Poland j. Z., Dulin´ ski, A., Kotan´ ski Jagellonian Univ, of Physics, D. e. p. t., PL 30059, Cracow, Poland k. G., Abbiendi13, L. A. T., Bauerdick, U., Behren, H., Beier, J. K., Bienlein, G., Case, O., Deppe, K., Desler, G., Drew, M., Flasin´ ski14, D. J., Gilkinson, C., Glasman, P., Go¨ ttlicher, J., Große Knetter, T., Haa, W., Hain, D., Hasell, H., Heßling, Y., Iga, K. F., Johnson15, P., Joo, M., Kasemann, R., Klanner, W., Koch, U., Ko¨ tz, H., Kowalski, J., Lab, A., Ladage, B., Lo¨ hr, M., Lo¨ we, D., Lu¨ ke, J., Mainusch16, O., Man´ czak, J., Milewski, T., Monteiro17, J. S. T., Ng, D., Notz, K., Ohrenberg, K., Piotrzkowski, M., Roco, M., Rohde, J., Rolda´n, U., Schneekloth, W., Schulz, F., Selonke, B., Surrow, E., Tassi, T., Voß, D., Westphal, G., Wolf, U., Wollmer, C., Youngman, W., Zeuner Deutsches Elektronen Synchrotron DESY, D., 22603 Hamburg, Germany H. J., Grabosch, Mari, Stefano Maria, A., Meyer, S., Schlenstedt DESY IfH Zeuthen, D., 15738 Zeuthen, Germany G., Barbagli, E., Gallo, P., Pelfer University, Infn, Florence, Italy f. G., Maccarrone, S., De Pasquale, L., Votano INFN, Laboratori Nazionali di, Frascati, I., 00044 Frascati, Italy f. A., Bamberger, S., Eisenhardt, T., Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B., R., D. 79104 Freiburg i. B., R., Germany c. J. T., Bromley, N. H., Brook, P. J., Bussey, A. T., Doyle, D. H., Saxon, L. E., Sinclair, E., Strickland, M. L., Utley, R., Waugh, of Physics, A. S. Wilson D. e. p. t., Astronomy, University of, Glasgow, Glasgow G12, 8qq, U. K. o. A., Dannemann20, U., Holm, D., Horstmann, R., Sinkus21, K., Wick Hamburg University, Physics, I. Institute of E. x. p., D., 22761 Hamburg, Germany c. B. D., Burow22, L., Hagge16, E., Lohrmann, G., Poelz, W., Schott, F., Zetsche Hamburg University, Physics, I. I. Institute of E. x. p., Germany c. T. C., Bacon, N., Bru¨ mmer, I., Butterworth, V. L., Harri, G., Howell, B. H. Y., Hung, L., Lamberti23, K. R., Long, D. B., Miller, N., Pavel, A., Prinias24, J. K., Sedgbeer, D., Sideri, A. F., Whitfield Imperial College London, High Energy Nuclear Physics, Group, London SW7, 2bz, U. K. o. U., Mallik, M. Z., Wang, S. M., Wang, J. T., Wu University of Iowa, Physics, Astronomy, Dept, Iowa, City, Ia, 52242, USA p. P., Cloth, D., Filges Forschungszentrum Ju¨ lich, Institut fu¨ r., Kernphysik, D., 52405 Ju¨ lich, Germany S. H., An, G. H., Cho, B. J., Ko, S. B., Lee, S. W., Nam, H. S., Park, S. K., Park Korea University, Seoul 136, 701, Korea h. S., Kartik, H. J., Kim, R. R., Mcneil, W., Metcalf, V. K., Nadendla Louisiana State University, Baton, Rouge, LA 70803, 4001, USA p. F., Barreiro, J. P., Fernandez, R., Graciani, J. M., Herna´ndez, L., Herva´, L., Labarga, M., Martinez, J., del Peso, J., Puga, J., Terron, Auto´ noma Madrid, J. F. de Troco´ niz U. n. i. v. e. r., Depto de F´ısica Teo´, R´ıca, E., 28049 Madrid, Spain n. F., Corriveau, D. S., Hanna, J., Hartmann, L. W., Hung, J. N., Lim, C. G., Matthews25, W. N., Murray, A., Och, P. M., Patel, M., Riveline, D. G., Stair, M., St Laurent, R., Ullmann, G., Zacek25 McGill University, Montre´al, PQ H3A, 2t8, Canada, A, b. T., Tsurugai Meiji Gakuin University, Faculty of General, Education, Yokohama, 244, Japan V., Bashkirov, B. A., Dolgoshein, A., Stifutkin Moscow Engineering Physics Institute, RU 115 409, Moscow, Russia l. G. L., Bashindzhagyan26, P. F., Ermolov, L. K., Gladilin, Golubkov, Y. u. A., V. D., Kobrin, I. A., Korzhavina, V. A., Kuzmin, Lukina, O. Y. u., A. S., Proskuryakov, A. A., Savin, L. M., Shcheglova, A. N., Solomin, N. P., Zotov Moscow State University, Institute of Nuclear, Physic, RU 119 899, Moscow, Russia m. M., Botje, F., Chlebana, J., Engelen, M., de Kamp, P., Kooijman, A., Kruse, A., van Sighem, H., Tiecke, W., Verkerke, J., Vossebeld, M., Vreeswijk, L., Wigger, E., de Wolf, R., van Woudenberg27 NIKHEF, University of, Amsterdam, NL 1009 DB, Amsterdam, Netherlands i. D., Acosta, B., Bylsma, L. S., Durkin, J., Gilmore, C. M., Ginsburg, C. L., Kim, C., Li, T. Y., Ling, P., Nylander, I. H., Park, T. A., Romanowski28 Ohio State University, Physics, Department, Columbus, OH 43210, 1106, USA p. D. S., Bailey, R. J., Cashmore29, A. M., Cooper Sarkar, R. C. E., Devenish, N., Harnew, M., Lancaster30, L., Lindemann, J. D., Mcfall, C., Nath, V. A., Noyes24, A., Quadt, J. R., Tickner, H., Uijterwaal, R., Walczak, D. S., Water, F. F., Wilson, T., Yip Department of Physic, University of, Oxford, Oxford, U. K. o. A., Bertolin, R., Brugnera, R., Carlin, F., Dal Corso, M., De Giorgi, U., Dosselli, S., Limentani, M., Morandin, M., Posocco, L., Stanco, R., Stroili, C., Voci, F., Zuin Dipartimento di Fisica dell’ Universita, Infn, I., 35131 Padova, Italy f. J., Bulmahn, R. G., Feild31, B. Y., Oh, J. J., Whitmore Pennsylvania State University, University, Park, Pa, 16802, USA q. G., D’Agostini, G., Marini, A., Nigro Dipartimento di Fisica, ’La Sapienza’, U. n. i. v., I., 00185 Rome, Italy f. J. C., Hart, N. A., Mccubbin, T. P., Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11, 0qx, U. K. o. E., Barberi, T., Dubb, C., Heusch, M., Van Hook, W., Lockman, J. T., Rahn, H. F. W., Sadrozinski, A., Seiden, D. C., Williams University of California, Santa, Cruz, Ca, 93106, USA p. J., Biltzinger, R. J., Seifert, O., Schwarzer, A. H., Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D., 57012 Siegen, Germany c. H., Abramowicz, G., Briskin, S., Dagan32, T., Doeker32, A., Levy26 Raymond, Beverly Sackler Faculty of Exact, Science, School of, Physic, Tel Aviv, University, Tel Aviv, 69978, Israel e. J. I., Fleck33, M., Inuzuka, T., Ishii, M., Kuze, S., Mine, M., Nakao, I., Suzuki, K., Tokushuku, K., Umemori, S., Yamada, Y., Yamazaki Institute for Nuclear Study, University of, Tokyo, Tokyo, 113, Japan g. M., Chiba, R., Hamatsu, T., Hirose, K., Homma, S., Kitamura34, T., Matsushita, K., Yamauchi Tokyo Metropolitan University, Tokyo 192, 03, Japan g. R., Cirio, M., Costa, M. I., Ferrero, S., Maselli, C., Peroni, R., Sacchi, A., Solano, A., Staiano Universita di Torino, Dipartimento di Fisica, Sperimentale, I., 10129 Torino, Italy f. M., Dardo II Faculty of Science, Torino, University, Infn, Alessandria, Italy f. D. C., Bailey, F., Benard, M., Brkic, C. P., Fagerstroem, G. F., Hartner, K. K., Joo, G. M., Levman, J. F., Martin, R. S., Orr, S., Polenz, C. R., Sampson, D., Simmon, R. J., Teuscher University of Toronto, Toronto, ON M5S, 1a7, Canada a. J. M., Butterworth, C. D., Catterall, T. W., Jone, P. B., Kaziewicz, J. B., Lane, R. L., Saunder, J., Shulman, M. R., Sutton University College London, London WC1E, 6bt, U. K. o. B., Lu, L. W., Mo Virginia Polytechnic Inst, State, University, Physics, Dept, Blacksburg, Va, 24061, USA q. W., Bogusz, J., Ciborowski, J., Gajewski, G., Grzelak35, M., Kasprzak, M., Krzyz˙anowski, K., Muchorowski36, R. J., Nowak, J. M., Pawlak, T., Tymieniecka, A. K., Wro´ blewski, J. A., Zakrzewski, A. F., Z˙ arnecki Warsaw University, Institute of Experimental, Physic, PL 00681, Warsaw, Poland j. M., Adamus Institute for Nuclear Studie, Poland j. C., Coldewey, Y., Eisenberg32, D., Hochman, U., Karshon32, D., Revel32, D., Zer Zion Weizmann Institute, Nuclear Physics, Dept, Rehovot, 76100, Israel d. W. F., Badgett, J., Breitweg, D., Chapin, R., Cro, S., Dasu, C., Fouda, R. J., Lovele, S., Mattingly, D. D., Reeder, S., Silverstein, W. H., Smith, A., Vaiciuli, M., Wodarczyk University of Wisconsin, Madison, Wi, 53706, USA p. S., Bhadra, M. L., Cardy37, W. R., Frisken, M., Khakzad, W. B., Schmidke York University, North, York, Toronto ON M3J, 1p3, and Canada, A.
Abstract: Transverse energy flow and forward jet cross sections at low values of x(Bj) are measured with the ZEUS detector at HERA in order to study the underlying parton dynamics (DGLAP versus BFKL). The energy how has been compared to different model simulations, but hadronization effects are too large to draw a firm conclusion. The measured jet cross section for 10(-4) < x(Bj) < 5.10(-3) is for the lower x(Bj)-bins larger than that of NLO QCD DGLAP calculations but lies still below a more qualitative BFKL prediction.
Published: 1997

9. Measurement of the proton structure function F-2 and the total gamma*p cross-section at low Q(2) and low x

Author: ZEUS Collaboration M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasin´ ski, J. Repond, R. Stanek, R. L. Ta laga, H. Zhang Argonne National Laboratory, Argonne, IL 60439, USA p. M. C. K. Mattingly Andrews University, Berrien Springs, USA F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini1, L. Cifarelli2, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, A. Polini, G. Sartorelli, Y. Zamora Garcia3, A. Zichichi University, INFN Bologna, I. 40126 Bologna, Italy f. C. Amelung, A. Bornheim, J. Crittenden, R. Deffner, M. Eckert, L. Feld, A. Frey4, M. Geerts5, M. Grothe, H. Hartmann, K. Heinloth, L. Heinz, E. Hilger, H. P. Jakob, U. F. Katz, S. Mengel6, E. Paul, M. Pfeiffer, C.h. Rembser, D. Schramm7, J. Stamm, R. Wedemeyer Physikalisches Institut der Universita¨t Bonn, D. 53115 Bonn, Germany c. S. Campbell Robson, A. Cassidy, W. N. Cottingham, N. Dyce, B. Foster, S. George, M. E. Hayes, G. P. Heath, H. F. Heath, D. Piccioni, D. G. Roff, R. J. Tapper, R. Yoshida H. H. Wills Physics Laboratory, University of Bristol, Bristol B58 1TL, U. K. o. M. Arneodo8, R. Ayad, M. Capua, A. Garfagnini, L. Iannotti, M. Schioppa, G. Susinno Calabria University, Physics D.e.p.t. and INFN, Cosenza, Italy f. A. Caldwell9, N. Cartiglia, Z. Jing, W. Liu, J. A. Parsons, S. Ritz10, F. Sciulli, P. B. Straub, L. Wai11, S. Yang12, Q. Zhu Columbia University, Nevis Labs, Irvington on Hudson, NY 10533, USA q. P. Borzemski, J. Chwastowski, A. Eskreys, Z. Jakubowski, M. B. Przybycien´, M. Zachara, L. Zawiejski I.n.s.t. of Nuclear Physics, PL 30055 Cracow, Poland j. L. Adamczyk, B. Bednarek, K. Jelen´, D. Kisielewska, T. Kowalski, M. Przybycien´, E. Rulikowska Zare¸bska, L. Suszycki, J. Zaja¸c Faculty of Physics, Nuclear Techniques, Academy of Mining, Metallurgy, Poland j. Z. Dulin´ ski, A. Kotan´ ski Jagellonian Univ, D.e.p.t. of Physics, PL 30059 Cracow, Poland k. G. Abbiendi13, L. A. T. Bauerdick, U. Behrens, H. Beier, J. K. Bienlein, G. Cases, O. Deppe, K. Desler, G. Drews, M. Flasin´ ski14, D. J. Gilkinson, C. Glasman, P. Go¨ ttlicher, J. Große Knetter, T. Haas, W. Hain, D. Hasell, H. Heßling, Y. Iga, K. F. Johnson15, P. Joos, M. Kasemann, R. Klanner, W. Koch, U. Ko¨ tz, H. Kowalski, J. Labs, A. Ladage, B. Lo¨ hr, M. Lo¨ we, D. Lu¨ ke, J. Mainusch16, O. Man´ czak, J. Milewski, T. Monteiro17, J. S. T. Ng, D. Notz, K. Ohrenberg, K. Piotrzkowski, M. Roco, M. Rohde, J. Rolda´n, U. Schneekloth, W. Schulz, F. Selonke, B. Surrow, E. Tassi, T. Voß, D. Westphal, G. Wolf, U. Wollmer, C. Youngman, W. Zeuner Deutsches Elektronen Synchrotron DESY, D. 22603 Hamburg, Germany H. J. Grabosch, A. Meyer, S. Schlenstedt DESY IfH Zeuthen, D. 15738 Zeuthen, Germany G. Barbagli, E. Gallo, P. Pelfer University, INFN, Florence, Italy f. G. Maccarrone, S. De Pasquale, L. Votano INFN, Laboratori Nazionali di Frascati, I. 00044 Frascati, Italy f. A. Bamberger, S. Eisenhardt, T. Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B.r., D. 79104 Freiburg i. B.r., Germany c. J. T. Bromley, N. H. Brook, P. J. Bussey, A. T. Doyle, D. H. Saxon, L. E. Sinclair, E. Strickland, M. L. Utley, R. Waugh, A. S. Wilson D.e.p.t. of Physics, Astronomy, University of Glasgow, Glasgow G12 8QQ, U. K. o. A. Dannemann20, U. Holm, D. Horstmann, R. Sinkus21, K. Wick Hamburg University, I. Institute of E.x.p. Physics, D. 22761 Hamburg, Germany c. B. D. Burow22, L. Hagge16, E. Lohrmann, G. Poelz, W. Schott, F. Zetsche Hamburg University, I.I. Institute of E.x.p. Physics, Germany c. T. C. Bacon, N. Bru¨ mmer, I. Butterworth, V. L. Harris, G. Howell, B. H. Y. Hung, L. Lamberti23, K. R. Long, D. B. Miller, N. Pavel, A. Prinias24, J. K. Sedgbeer, D. Sideris, A. F. Whitfield Imperial College London, High Energy Nuclear Physics Group, London SW7 2BZ, U. K. o. U. Mallik, M. Z. Wang, S. M. Wang, J. T. Wu University of Iowa, Physics, Astronomy Dept, Iowa City, IA 52242, USA p. P. Cloth, D. Filges Forschungszentrum Ju¨ lich, Institut fu¨ r. Kernphysik, D. 52405 Ju¨ lich, Germany S. H. An, G. H. Cho, B. J. Ko, S. B. Lee, S. W. Nam, H. S. Park, S. K. Park Korea University, Seoul 136 701, Korea h. S. Kartik, H. J. Kim, R. R. McNeil, W. Metcalf, V. K. Nadendla Louisiana State University, Baton Rouge, LA 70803 4001, USA p. F. Barreiro, J. P. Fernandez, R. Graciani, J. M. Herna´ndez, L. Herva´s, L. Labarga, M. Martinez, J. del Peso, J. Puga, J. Terron, J. F. de Troco´ niz U.n.i.v.e.r. Auto´ noma Madrid, Depto de F´ısica Teo´ r´ıca, E. 28049 Madrid, Spain n. F. Corriveau, D. S. Hanna, J. Hartmann, L. W. Hung, J. N. Lim, C. G. Matthews25, W. N. Murray, A. Ochs, P. M. Patel, M. Riveline, D. G. Stairs, M. St Laurent, R. Ullmann, G. Zacek25 McGill University, Montre´al, PQ H3A 2T8, Canada a, b. T. Tsurugai Meiji Gakuin University, Faculty of General Education, Yokohama 244, Japan V. Bashkirov, B. A. Dolgoshein, A. Stifutkin Moscow Engineering Physics Institute, RU 115 409 Moscow, Russia l. G. L. Bashindzhagyan26, P. F. Ermolov, L. K. Gladilin, Y.u. A. Golubkov, V. D. Kobrin, I. A. Korzhavina, V. A. Kuzmin, O. Y.u. Lukina, A. S. Proskuryakov, A. A. Savin, L. M. Shcheglova, A. N. Solomin, N. P. Zotov Moscow State University, Institute of Nuclear Physics, RU 119 899 Moscow, Russia m. M. Botje, F. Chlebana, J. Engelen, M. de Kamps, P. Kooijman, A. Kruse, A. van Sighem, H. Tiecke, W. Verkerke, J. Vossebeld, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg27 NIKHEF, University of Amsterdam, NL 1009 DB Amsterdam, Netherlands i. D. Acosta, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, C. Li, T. Y. Ling, P. Nylander, I. H. Park, T. A. Romanowski28 Ohio State University, Physics Department, Columbus, OH 43210 1106, USA p. D. S. Bailey, R. J. Cashmore29, A. M. Cooper Sarkar, R. C. E. Devenish, N. Harnew, M. Lancaster30, L. Lindemann, J. D. McFall, C. Nath, V. A. Noyes24, A. Quadt, J. R. Tickner, H. Uijterwaal, R. Walczak, D. S. Waters, F. F. Wilson, T. Yip Department of Physics, University of Oxford, Oxford, U. K. o. A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, F. Zuin Dipartimento di Fisica dell’ Universita, INFN, I. 35131 Padova, Italy f. J. Bulmahn, R. G. Feild31, B. Y. Oh, J. J. Whitmore Pennsylvania State University, University Park, PA 16802, USA q. G. D’Agostini, G. Marini, A. Nigro Dipartimento di Fisica, U.n.i.v. ’La Sapienza’, I. 00185 Rome, Italy f. J. C. Hart, N. A. McCubbin, T. P. Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U. K. o. E. Barberis, T. Dubbs, C. Heusch, M. Van Hook, W. Lockman, J. T. Rahn, H. F. W. Sadrozinski, A. Seiden, D. C. Williams University of California, Santa Cruz, CA 93106, USA p. J. Biltzinger, R. J. Seifert, O. Schwarzer, A. H. Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D. 57012 Siegen, Germany c. H. Abramowicz, G. Briskin, S. Dagan32, T. Doeker32, A. Levy26 Raymond, Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv 69978, Israel e. J. I. Fleck33, M. Inuzuka, T. Ishii, M. Kuze, S. Mine, M. Nakao, I. Suzuki, K. Tokushuku, K. Umemori, S. Yamada, Y. Yamazaki Institute for Nuclear Study, University of Tokyo, Tokyo 113, Japan g. M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura34, T. Matsushita, K. Yamauchi Tokyo Metropolitan University, Tokyo 192 03, Japan g. R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano Universita di Torino, Dipartimento di Fisica Sperimentale, I. 10129 Torino, Italy f. M. Dardo II Faculty of Sciences, Torino University, INFN Alessandria, Italy f. D. C. Bailey, F. Benard, M. Brkic, C. P. Fagerstroem, G. F. Hartner, K. K. Joo, G. M. Levman, J. F. Martin, R. S. Orr, S. Polenz, C. R. Sampson, D. Simmons, R. J. Teuscher University of Toronto, Toronto, ON M5S 1A7, Canada a. J. M. Butterworth, C. D. Catterall, T. W. Jones, P. B. Kaziewicz, J. B. Lane, R. L. Saunders, J. Shulman, M. R. Sutton University College London, London WC1E 6BT, U. K. o. B. Lu, L. W. Mo Virginia Polytechnic Inst, State University, Physics Dept, Blacksburg, VA 24061, USA q. W. Bogusz, J. Ciborowski, J. Gajewski, G. Grzelak35, M. Kasprzak, M. Krzyz˙anowski, K. Muchorowski36, R. J. Nowak, J. M. Pawlak, T. Tymieniecka, A. K. Wro´ blewski, J. A. Zakrzewski, A. F. Z˙ arnecki Warsaw University, Institute of Experimental Physics, PL 00681 Warsaw, Poland j. M. Adamus Institute for Nuclear Studies, Poland j. C. Coldewey, Y. Eisenberg32, D. Hochman, U. Karshon32, D. Revel32, D. Zer Zion Weizmann Institute, Nuclear Physics Dept, Rehovot 76100, Israel d. W. F. Badgett, J. Breitweg, D. Chapin, R. Cross, S. Dasu, C. Foudas, R. J. Loveless, S. Mattingly, D. D. Reeder, S. Silverstein, W. H. Smith, A. Vaiciulis, M. Wodarczyk University of Wisconsin, Madison, WI 53706, USA p. S. Bhadra, M. L. Cardy37, W. R. Frisken, M. Khakzad, W. B. Schmidke York University, North York, Toronto ON M3J 1P3, Canada a., MARI, Stefano Maria, ZEUS Collaboration M., Derrick, D., Krakauer, S., Magill, D., Mikuna, B., Musgrave, J. R., Okrasin´ ski, J., Repond, R., Stanek, R. L., Ta laga, H., Zhang Argonne National Laboratory, Argonne, Il, 60439, USA p. M. C. K., Mattingly Andrews University, Berrien, Spring, Mi, USA F., Anselmo, P., Antonioli, G., Bari, M., Basile, L., Bellagamba, D., Boscherini, A., Bruni, G., Bruni, P., Bruni, G., Cara Romeo, G., Castellini1, L., Cifarelli2, F., Cindolo, A., Contin, M., Corradi, I., Giala, P., Giusti, G., Iacobucci, G., Laurenti, G., Levi, A., Margotti, T., Massam, R., Nania, F., Palmonari, A., Pesci, A., Polini, G., Sartorelli, Y., Zamora Garcia3, A., Zichichi University, Infn, Bologna, I., 40126 Bologna, Italy f. C., Amelung, A., Bornheim, J., Crittenden, R., Deffner, M., Eckert, L., Feld, A., Frey4, M., Geerts5, M., Grothe, H., Hartmann, K., Heinloth, L., Heinz, E., Hilger, H. P., Jakob, U. F., Katz, S., Mengel6, E., Paul, M., Pfeiffer, Rembser, C. h., D., Schramm7, J., Stamm, R., Wedemeyer Physikalisches Institut der Universita¨t Bonn, D., 53115 Bonn, Germany c. S., Campbell Robson, A., Cassidy, W. N., Cottingham, N., Dyce, B., Foster, S., George, M. E., Haye, G. P., Heath, H. F., Heath, D., Piccioni, D. G., Roff, R. J., Tapper, R. Yoshida H. H., Wills Physics Laboratory, University of, Bristol, Bristol B58, 1tl, U. K. o. M., Arneodo8, R., Ayad, M., Capua, A., Garfagnini, L., Iannotti, M., Schioppa, G., Susinno Calabria University, and INFN, Physics D. e. p. t., Cosenza, Italy f. A., Caldwell9, N., Cartiglia, Z., Jing, W., Liu, J. A., Parson, S., Ritz10, F., Sciulli, P. B., Straub, L., Wai11, S., Yang12, Q., Zhu Columbia University, Nevis, Lab, Irvington on, Hudson, Ny, 10533, USA q. P., Borzemski, J., Chwastowski, A., Eskrey, Z., Jakubowski, M. B., Przybycien´, M., Zachara, of Nuclear Physics, L. Zawiejski I. n. s. t., PL 30055, Cracow, Poland j. L., Adamczyk, B., Bednarek, K., Jelen´, D., Kisielewska, T., Kowalski, M., Przybycien´, E., Rulikowska Zare¸bska, L., Suszycki, J., Zaja¸c Faculty of Physic, Nuclear, Technique, Academy of, Mining, Metallurgy, Poland j. Z., Dulin´ ski, A., Kotan´ ski Jagellonian Univ, of Physics, D. e. p. t., PL 30059, Cracow, Poland k. G., Abbiendi13, L. A. T., Bauerdick, U., Behren, H., Beier, J. K., Bienlein, G., Case, O., Deppe, K., Desler, G., Drew, M., Flasin´ ski14, D. J., Gilkinson, C., Glasman, P., Go¨ ttlicher, J., Große Knetter, T., Haa, W., Hain, D., Hasell, H., Heßling, Y., Iga, K. F., Johnson15, P., Joo, M., Kasemann, R., Klanner, W., Koch, U., Ko¨ tz, H., Kowalski, J., Lab, A., Ladage, B., Lo¨ hr, M., Lo¨ we, D., Lu¨ ke, J., Mainusch16, O., Man´ czak, J., Milewski, T., Monteiro17, J. S. T., Ng, D., Notz, K., Ohrenberg, K., Piotrzkowski, M., Roco, M., Rohde, J., Rolda´n, U., Schneekloth, W., Schulz, F., Selonke, B., Surrow, E., Tassi, T., Voß, D., Westphal, G., Wolf, U., Wollmer, C., Youngman, W., Zeuner Deutsches Elektronen Synchrotron DESY, D., 22603 Hamburg, Germany H. J., Grabosch, Mari, Stefano Maria, A., Meyer, S., Schlenstedt DESY IfH Zeuthen, D., 15738 Zeuthen, Germany G., Barbagli, E., Gallo, P., Pelfer University, Infn, Florence, Italy f. G., Maccarrone, S., De Pasquale, L., Votano INFN, Laboratori Nazionali di, Frascati, I., 00044 Frascati, Italy f. A., Bamberger, S., Eisenhardt, T., Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B., R., D. 79104 Freiburg i. B., R., Germany c. J. T., Bromley, N. H., Brook, P. J., Bussey, A. T., Doyle, D. H., Saxon, L. E., Sinclair, E., Strickland, M. L., Utley, R., Waugh, of Physics, A. S. Wilson D. e. p. t., Astronomy, University of, Glasgow, Glasgow G12, 8qq, U. K. o. A., Dannemann20, U., Holm, D., Horstmann, R., Sinkus21, K., Wick Hamburg University, Physics, I. Institute of E. x. p., D., 22761 Hamburg, Germany c. B. D., Burow22, L., Hagge16, E., Lohrmann, G., Poelz, W., Schott, F., Zetsche Hamburg University, Physics, I. I. Institute of E. x. p., Germany c. T. C., Bacon, N., Bru¨ mmer, I., Butterworth, V. L., Harri, G., Howell, B. H. Y., Hung, L., Lamberti23, K. R., Long, D. B., Miller, N., Pavel, A., Prinias24, J. K., Sedgbeer, D., Sideri, A. F., Whitfield Imperial College London, High Energy Nuclear Physics, Group, London SW7, 2bz, U. K. o. U., Mallik, M. Z., Wang, S. M., Wang, J. T., Wu University of Iowa, Physics, Astronomy, Dept, Iowa, City, Ia, 52242, USA p. P., Cloth, D., Filges Forschungszentrum Ju¨ lich, Institut fu¨ r., Kernphysik, D., 52405 Ju¨ lich, Germany S. H., An, G. H., Cho, B. J., Ko, S. B., Lee, S. W., Nam, H. S., Park, S. K., Park Korea University, Seoul 136, 701, Korea h. S., Kartik, H. J., Kim, R. R., Mcneil, W., Metcalf, V. K., Nadendla Louisiana State University, Baton, Rouge, LA 70803, 4001, USA p. F., Barreiro, J. P., Fernandez, R., Graciani, J. M., Herna´ndez, L., Herva´, L., Labarga, M., Martinez, J., del Peso, J., Puga, J., Terron, Auto´ noma Madrid, J. F. de Troco´ niz U. n. i. v. e. r., Depto de F´ısica Teo´, R´ıca, E., 28049 Madrid, Spain n. F., Corriveau, D. S., Hanna, J., Hartmann, L. W., Hung, J. N., Lim, C. G., Matthews25, W. N., Murray, A., Och, P. M., Patel, M., Riveline, D. G., Stair, M., St Laurent, R., Ullmann, G., Zacek25 McGill University, Montre´al, PQ H3A, 2t8, Canada, A, b. T., Tsurugai Meiji Gakuin University, Faculty of General, Education, Yokohama, 244, Japan V., Bashkirov, B. A., Dolgoshein, A., Stifutkin Moscow Engineering Physics Institute, RU 115 409, Moscow, Russia l. G. L., Bashindzhagyan26, P. F., Ermolov, L. K., Gladilin, Golubkov, Y. u. A., V. D., Kobrin, I. A., Korzhavina, V. A., Kuzmin, Lukina, O. Y. u., A. S., Proskuryakov, A. A., Savin, L. M., Shcheglova, A. N., Solomin, N. P., Zotov Moscow State University, Institute of Nuclear, Physic, RU 119 899, Moscow, Russia m. M., Botje, F., Chlebana, J., Engelen, M., de Kamp, P., Kooijman, A., Kruse, A., van Sighem, H., Tiecke, W., Verkerke, J., Vossebeld, M., Vreeswijk, L., Wigger, E., de Wolf, R., van Woudenberg27 NIKHEF, University of, Amsterdam, NL 1009 DB, Amsterdam, Netherlands i. D., Acosta, B., Bylsma, L. S., Durkin, J., Gilmore, C. M., Ginsburg, C. L., Kim, C., Li, T. Y., Ling, P., Nylander, I. H., Park, T. A., Romanowski28 Ohio State University, Physics, Department, Columbus, OH 43210, 1106, USA p. D. S., Bailey, R. J., Cashmore29, A. M., Cooper Sarkar, R. C. E., Devenish, N., Harnew, M., Lancaster30, L., Lindemann, J. D., Mcfall, C., Nath, V. A., Noyes24, A., Quadt, J. R., Tickner, H., Uijterwaal, R., Walczak, D. S., Water, F. F., Wilson, T., Yip Department of Physic, University of, Oxford, Oxford, U. K. o. A., Bertolin, R., Brugnera, R., Carlin, F., Dal Corso, M., De Giorgi, U., Dosselli, S., Limentani, M., Morandin, M., Posocco, L., Stanco, R., Stroili, C., Voci, F., Zuin Dipartimento di Fisica dell’ Universita, Infn, I., 35131 Padova, Italy f. J., Bulmahn, R. G., Feild31, B. Y., Oh, J. J., Whitmore Pennsylvania State University, University, Park, Pa, 16802, USA q. G., D’Agostini, G., Marini, A., Nigro Dipartimento di Fisica, ’La Sapienza’, U. n. i. v., I., 00185 Rome, Italy f. J. C., Hart, N. A., Mccubbin, T. P., Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11, 0qx, U. K. o. E., Barberi, T., Dubb, C., Heusch, M., Van Hook, W., Lockman, J. T., Rahn, H. F. W., Sadrozinski, A., Seiden, D. C., Williams University of California, Santa, Cruz, Ca, 93106, USA p. J., Biltzinger, R. J., Seifert, O., Schwarzer, A. H., Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D., 57012 Siegen, Germany c. H., Abramowicz, G., Briskin, S., Dagan32, T., Doeker32, A., Levy26 Raymond, Beverly Sackler Faculty of Exact, Science, School of, Physic, Tel Aviv, University, Tel Aviv, 69978, Israel e. J. I., Fleck33, M., Inuzuka, T., Ishii, M., Kuze, S., Mine, M., Nakao, I., Suzuki, K., Tokushuku, K., Umemori, S., Yamada, Y., Yamazaki Institute for Nuclear Study, University of, Tokyo, Tokyo, 113, Japan g. M., Chiba, R., Hamatsu, T., Hirose, K., Homma, S., Kitamura34, T., Matsushita, K., Yamauchi Tokyo Metropolitan University, Tokyo 192, 03, Japan g. R., Cirio, M., Costa, M. I., Ferrero, S., Maselli, C., Peroni, R., Sacchi, A., Solano, A., Staiano Universita di Torino, Dipartimento di Fisica, Sperimentale, I., 10129 Torino, Italy f. M., Dardo II Faculty of Science, Torino, University, Infn, Alessandria, Italy f. D. C., Bailey, F., Benard, M., Brkic, C. P., Fagerstroem, G. F., Hartner, K. K., Joo, G. M., Levman, J. F., Martin, R. S., Orr, S., Polenz, C. R., Sampson, D., Simmon, R. J., Teuscher University of Toronto, Toronto, ON M5S, 1a7, Canada a. J. M., Butterworth, C. D., Catterall, T. W., Jone, P. B., Kaziewicz, J. B., Lane, R. L., Saunder, J., Shulman, M. R., Sutton University College London, London WC1E, 6bt, U. K. o. B., Lu, L. W., Mo Virginia Polytechnic Inst, State, University, Physics, Dept, Blacksburg, Va, 24061, USA q. W., Bogusz, J., Ciborowski, J., Gajewski, G., Grzelak35, M., Kasprzak, M., Krzyz˙anowski, K., Muchorowski36, R. J., Nowak, J. M., Pawlak, T., Tymieniecka, A. K., Wro´ blewski, J. A., Zakrzewski, A. F., Z˙ arnecki Warsaw University, Institute of Experimental, Physic, PL 00681, Warsaw, Poland j. M., Adamus Institute for Nuclear Studie, Poland j. C., Coldewey, Y., Eisenberg32, D., Hochman, U., Karshon32, D., Revel32, D., Zer Zion Weizmann Institute, Nuclear Physics, Dept, Rehovot, 76100, Israel d. W. F., Badgett, J., Breitweg, D., Chapin, R., Cro, S., Dasu, C., Fouda, R. J., Lovele, S., Mattingly, D. D., Reeder, S., Silverstein, W. H., Smith, A., Vaiciuli, M., Wodarczyk University of Wisconsin, Madison, Wi, 53706, USA p. S., Bhadra, M. L., Cardy37, W. R., Frisken, M., Khakzad, W. B., Schmidke York University, North, York, Toronto ON M3J, 1p3, and Canada, A.
Abstract: The ZEUS-experiment at HERA has significantly enhanced the kinematic coverage for low Q(2) and low x inelastic e(+)p --> e(+) X scattering with an upgrade of the ZEUS-detector in 1995 which extends the acceptance for small positron scattering angles. The upgrade included the modification of the beam pipe with low mass exit windows and the installation of a small electromagnetic sampling calorimeter, the Beam Pipe Calorimeter (BPC), to explore the region in Q(2) of 0.11 less than or equal to Q(2) less than or equal to 0.65 GeV2. A shift of two rear uranium calorimeter (RCAL) modules and the small rear tracking detector (SRTD) closer to the beam together with a data sample taken with a shifted event vertex extended the Q(2) coverage of the main detector down to 0.6 GeV2. Both data sets have been used to measure the proton structure function F-2 and the total virtual photonproton gamma*p cross-section. Results are presented for 0.11 less than or equal to Q(2) less than or equal to 6.10 GeV2 and 2.10(-6) less than or equal to x less than or equal to 7.10(-4) along with a comparison to various models.
Published: 1997

10. QCD fits to ZEUS and fixed target structure function data

Author: ZEUS Collaboration M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasin´ ski, J. Repond, R. Stanek, R. L. Ta laga, H. Zhang Argonne National Laboratory, Argonne, IL 60439, USA p. M. C. K. Mattingly Andrews University, Berrien Springs, USA F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini1, L. Cifarelli2, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, A. Polini, G. Sartorelli, Y. Zamora Garcia3, A. Zichichi University, INFN Bologna, I. 40126 Bologna, Italy f. C. Amelung, A. Bornheim, J. Crittenden, R. Deffner, M. Eckert, L. Feld, A. Frey4, M. Geerts5, M. Grothe, H. Hartmann, K. Heinloth, L. Heinz, E. Hilger, H. P. Jakob, U. F. Katz, S. Mengel6, E. Paul, M. Pfeiffer, C.h. Rembser, D. Schramm7, J. Stamm, R. Wedemeyer Physikalisches Institut der Universita¨t Bonn, D. 53115 Bonn, Germany c. S. Campbell Robson, A. Cassidy, W. N. Cottingham, N. Dyce, B. Foster, S. George, M. E. Hayes, G. P. Heath, H. F. Heath, D. Piccioni, D. G. Roff, R. J. Tapper, R. Yoshida H. H. Wills Physics Laboratory, University of Bristol, Bristol B58 1TL, U. K. o. M. Arneodo8, R. Ayad, M. Capua, A. Garfagnini, L. Iannotti, M. Schioppa, G. Susinno Calabria University, Physics D.e.p.t. and INFN, Cosenza, Italy f. A. Caldwell9, N. Cartiglia, Z. Jing, W. Liu, J. A. Parsons, S. Ritz10, F. Sciulli, P. B. Straub, L. Wai11, S. Yang12, Q. Zhu Columbia University, Nevis Labs, Irvington on Hudson, NY 10533, USA q. P. Borzemski, J. Chwastowski, A. Eskreys, Z. Jakubowski, M. B. Przybycien´, M. Zachara, L. Zawiejski I.n.s.t. of Nuclear Physics, PL 30055 Cracow, Poland j. L. Adamczyk, B. Bednarek, K. Jelen´, D. Kisielewska, T. Kowalski, M. Przybycien´, E. Rulikowska Zare¸bska, L. Suszycki, J. Zaja¸c Faculty of Physics, Nuclear Techniques, Academy of Mining, Metallurgy, Poland j. Z. Dulin´ ski, A. Kotan´ ski Jagellonian Univ, D.e.p.t. of Physics, PL 30059 Cracow, Poland k. G. Abbiendi13, L. A. T. Bauerdick, U. Behrens, H. Beier, J. K. Bienlein, G. Cases, O. Deppe, K. Desler, G. Drews, M. Flasin´ ski14, D. J. Gilkinson, C. Glasman, P. Go¨ ttlicher, J. Große Knetter, T. Haas, W. Hain, D. Hasell, H. Heßling, Y. Iga, K. F. Johnson15, P. Joos, M. Kasemann, R. Klanner, W. Koch, U. Ko¨ tz, H. Kowalski, J. Labs, A. Ladage, B. Lo¨ hr, M. Lo¨ we, D. Lu¨ ke, J. Mainusch16, O. Man´ czak, J. Milewski, T. Monteiro17, J. S. T. Ng, D. Notz, K. Ohrenberg, K. Piotrzkowski, M. Roco, M. Rohde, J. Rolda´n, U. Schneekloth, W. Schulz, F. Selonke, B. Surrow, E. Tassi, T. Voß, D. Westphal, G. Wolf, U. Wollmer, C. Youngman, W. Zeuner Deutsches Elektronen Synchrotron DESY, D. 22603 Hamburg, Germany H. J. Grabosch, A. Meyer, S. Schlenstedt DESY IfH Zeuthen, D. 15738 Zeuthen, Germany G. Barbagli, E. Gallo, P. Pelfer University, INFN, Florence, Italy f. G. Maccarrone, S. De Pasquale, L. Votano INFN, Laboratori Nazionali di Frascati, I. 00044 Frascati, Italy f. A. Bamberger, S. Eisenhardt, T. Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B.r., D. 79104 Freiburg i. B.r., Germany c. J. T. Bromley, N. H. Brook, P. J. Bussey, A. T. Doyle, D. H. Saxon, L. E. Sinclair, E. Strickland, M. L. Utley, R. Waugh, A. S. Wilson D.e.p.t. of Physics, Astronomy, University of Glasgow, Glasgow G12 8QQ, U. K. o. A. Dannemann20, U. Holm, D. Horstmann, R. Sinkus21, K. Wick Hamburg University, I. Institute of E.x.p. Physics, D. 22761 Hamburg, Germany c. B. D. Burow22, L. Hagge16, E. Lohrmann, G. Poelz, W. Schott, F. Zetsche Hamburg University, I.I. Institute of E.x.p. Physics, Germany c. T. C. Bacon, N. Bru¨ mmer, I. Butterworth, V. L. Harris, G. Howell, B. H. Y. Hung, L. Lamberti23, K. R. Long, D. B. Miller, N. Pavel, A. Prinias24, J. K. Sedgbeer, D. Sideris, A. F. Whitfield Imperial College London, High Energy Nuclear Physics Group, London SW7 2BZ, U. K. o. U. Mallik, M. Z. Wang, S. M. Wang, J. T. Wu University of Iowa, Physics, Astronomy Dept, Iowa City, IA 52242, USA p. P. Cloth, D. Filges Forschungszentrum Ju¨ lich, Institut fu¨ r. Kernphysik, D. 52405 Ju¨ lich, Germany S. H. An, G. H. Cho, B. J. Ko, S. B. Lee, S. W. Nam, H. S. Park, S. K. Park Korea University, Seoul 136 701, Korea h. S. Kartik, H. J. Kim, R. R. McNeil, W. Metcalf, V. K. Nadendla Louisiana State University, Baton Rouge, LA 70803 4001, USA p. F. Barreiro, J. P. Fernandez, R. Graciani, J. M. Herna´ndez, L. Herva´s, L. Labarga, M. Martinez, J. del Peso, J. Puga, J. Terron, J. F. de Troco´ niz U.n.i.v.e.r. Auto´ noma Madrid, Depto de F´ısica Teo´ r´ıca, E. 28049 Madrid, Spain n. F. Corriveau, D. S. Hanna, J. Hartmann, L. W. Hung, J. N. Lim, C. G. Matthews25, W. N. Murray, A. Ochs, P. M. Patel, M. Riveline, D. G. Stairs, M. St Laurent, R. Ullmann, G. Zacek25 McGill University, Montre´al, PQ H3A 2T8, Canada a, b. T. Tsurugai Meiji Gakuin University, Faculty of General Education, Yokohama 244, Japan V. Bashkirov, B. A. Dolgoshein, A. Stifutkin Moscow Engineering Physics Institute, RU 115 409 Moscow, Russia l. G. L. Bashindzhagyan26, P. F. Ermolov, L. K. Gladilin, Y.u. A. Golubkov, V. D. Kobrin, I. A. Korzhavina, V. A. Kuzmin, O. Y.u. Lukina, A. S. Proskuryakov, A. A. Savin, L. M. Shcheglova, A. N. Solomin, N. P. Zotov Moscow State University, Institute of Nuclear Physics, RU 119 899 Moscow, Russia m. M. Botje, F. Chlebana, J. Engelen, M. de Kamps, P. Kooijman, A. Kruse, A. van Sighem, H. Tiecke, W. Verkerke, J. Vossebeld, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg27 NIKHEF, University of Amsterdam, NL 1009 DB Amsterdam, Netherlands i. D. Acosta, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, C. Li, T. Y. Ling, P. Nylander, I. H. Park, T. A. Romanowski28 Ohio State University, Physics Department, Columbus, OH 43210 1106, USA p. D. S. Bailey, R. J. Cashmore29, A. M. Cooper Sarkar, R. C. E. Devenish, N. Harnew, M. Lancaster30, L. Lindemann, J. D. McFall, C. Nath, V. A. Noyes24, A. Quadt, J. R. Tickner, H. Uijterwaal, R. Walczak, D. S. Waters, F. F. Wilson, T. Yip Department of Physics, University of Oxford, Oxford, U. K. o. A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, F. Zuin Dipartimento di Fisica dell’ Universita, INFN, I. 35131 Padova, Italy f. J. Bulmahn, R. G. Feild31, B. Y. Oh, J. J. Whitmore Pennsylvania State University, University Park, PA 16802, USA q. G. D’Agostini, G. Marini, A. Nigro Dipartimento di Fisica, U.n.i.v. ’La Sapienza’, I. 00185 Rome, Italy f. J. C. Hart, N. A. McCubbin, T. P. Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U. K. o. E. Barberis, T. Dubbs, C. Heusch, M. Van Hook, W. Lockman, J. T. Rahn, H. F. W. Sadrozinski, A. Seiden, D. C. Williams University of California, Santa Cruz, CA 93106, USA p. J. Biltzinger, R. J. Seifert, O. Schwarzer, A. H. Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D. 57012 Siegen, Germany c. H. Abramowicz, G. Briskin, S. Dagan32, T. Doeker32, A. Levy26 Raymond, Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv 69978, Israel e. J. I. Fleck33, M. Inuzuka, T. Ishii, M. Kuze, S. Mine, M. Nakao, I. Suzuki, K. Tokushuku, K. Umemori, S. Yamada, Y. Yamazaki Institute for Nuclear Study, University of Tokyo, Tokyo 113, Japan g. M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura34, T. Matsushita, K. Yamauchi Tokyo Metropolitan University, Tokyo 192 03, Japan g. R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano Universita di Torino, Dipartimento di Fisica Sperimentale, I. 10129 Torino, Italy f. M. Dardo II Faculty of Sciences, Torino University, INFN Alessandria, Italy f. D. C. Bailey, F. Benard, M. Brkic, C. P. Fagerstroem, G. F. Hartner, K. K. Joo, G. M. Levman, J. F. Martin, R. S. Orr, S. Polenz, C. R. Sampson, D. Simmons, R. J. Teuscher University of Toronto, Toronto, ON M5S 1A7, Canada a. J. M. Butterworth, C. D. Catterall, T. W. Jones, P. B. Kaziewicz, J. B. Lane, R. L. Saunders, J. Shulman, M. R. Sutton University College London, London WC1E 6BT, U. K. o. B. Lu, L. W. Mo Virginia Polytechnic Inst, State University, Physics Dept, Blacksburg, VA 24061, USA q. W. Bogusz, J. Ciborowski, J. Gajewski, G. Grzelak35, M. Kasprzak, M. Krzyz˙anowski, K. Muchorowski36, R. J. Nowak, J. M. Pawlak, T. Tymieniecka, A. K. Wro´ blewski, J. A. Zakrzewski, A. F. Z˙ arnecki Warsaw University, Institute of Experimental Physics, PL 00681 Warsaw, Poland j. M. Adamus Institute for Nuclear Studies, Poland j. C. Coldewey, Y. Eisenberg32, D. Hochman, U. Karshon32, D. Revel32, D. Zer Zion Weizmann Institute, Nuclear Physics Dept, Rehovot 76100, Israel d. W. F. Badgett, J. Breitweg, D. Chapin, R. Cross, S. Dasu, C. Foudas, R. J. Loveless, S. Mattingly, D. D. Reeder, S. Silverstein, W. H. Smith, A. Vaiciulis, M. Wodarczyk University of Wisconsin, Madison, WI 53706, USA p. S. Bhadra, M. L. Cardy37, W. R. Frisken, M. Khakzad, W. B. Schmidke York University, North York, Toronto ON M3J 1P3, Canada a., MARI, Stefano Maria, ZEUS Collaboration M., Derrick, D., Krakauer, S., Magill, D., Mikuna, B., Musgrave, J. R., Okrasin´ ski, J., Repond, R., Stanek, R. L., Ta laga, H., Zhang Argonne National Laboratory, Argonne, Il, 60439, USA p. M. C. K., Mattingly Andrews University, Berrien, Spring, Mi, USA F., Anselmo, P., Antonioli, G., Bari, M., Basile, L., Bellagamba, D., Boscherini, A., Bruni, G., Bruni, P., Bruni, G., Cara Romeo, G., Castellini1, L., Cifarelli2, F., Cindolo, A., Contin, M., Corradi, I., Giala, P., Giusti, G., Iacobucci, G., Laurenti, G., Levi, A., Margotti, T., Massam, R., Nania, F., Palmonari, A., Pesci, A., Polini, G., Sartorelli, Y., Zamora Garcia3, A., Zichichi University, Infn, Bologna, I., 40126 Bologna, Italy f. C., Amelung, A., Bornheim, J., Crittenden, R., Deffner, M., Eckert, L., Feld, A., Frey4, M., Geerts5, M., Grothe, H., Hartmann, K., Heinloth, L., Heinz, E., Hilger, H. P., Jakob, U. F., Katz, S., Mengel6, E., Paul, M., Pfeiffer, Rembser, C. h., D., Schramm7, J., Stamm, R., Wedemeyer Physikalisches Institut der Universita¨t Bonn, D., 53115 Bonn, Germany c. S., Campbell Robson, A., Cassidy, W. N., Cottingham, N., Dyce, B., Foster, S., George, M. E., Haye, G. P., Heath, H. F., Heath, D., Piccioni, D. G., Roff, R. J., Tapper, R. Yoshida H. H., Wills Physics Laboratory, University of, Bristol, Bristol B58, 1tl, U. K. o. M., Arneodo8, R., Ayad, M., Capua, A., Garfagnini, L., Iannotti, M., Schioppa, G., Susinno Calabria University, and INFN, Physics D. e. p. t., Cosenza, Italy f. A., Caldwell9, N., Cartiglia, Z., Jing, W., Liu, J. A., Parson, S., Ritz10, F., Sciulli, P. B., Straub, L., Wai11, S., Yang12, Q., Zhu Columbia University, Nevis, Lab, Irvington on, Hudson, Ny, 10533, USA q. P., Borzemski, J., Chwastowski, A., Eskrey, Z., Jakubowski, M. B., Przybycien´, M., Zachara, of Nuclear Physics, L. Zawiejski I. n. s. t., PL 30055, Cracow, Poland j. L., Adamczyk, B., Bednarek, K., Jelen´, D., Kisielewska, T., Kowalski, M., Przybycien´, E., Rulikowska Zare¸bska, L., Suszycki, J., Zaja¸c Faculty of Physic, Nuclear, Technique, Academy of, Mining, Metallurgy, Poland j. Z., Dulin´ ski, A., Kotan´ ski Jagellonian Univ, of Physics, D. e. p. t., PL 30059, Cracow, Poland k. G., Abbiendi13, L. A. T., Bauerdick, U., Behren, H., Beier, J. K., Bienlein, G., Case, O., Deppe, K., Desler, G., Drew, M., Flasin´ ski14, D. J., Gilkinson, C., Glasman, P., Go¨ ttlicher, J., Große Knetter, T., Haa, W., Hain, D., Hasell, H., Heßling, Y., Iga, K. F., Johnson15, P., Joo, M., Kasemann, R., Klanner, W., Koch, U., Ko¨ tz, H., Kowalski, J., Lab, A., Ladage, B., Lo¨ hr, M., Lo¨ we, D., Lu¨ ke, J., Mainusch16, O., Man´ czak, J., Milewski, T., Monteiro17, J. S. T., Ng, D., Notz, K., Ohrenberg, K., Piotrzkowski, M., Roco, M., Rohde, J., Rolda´n, U., Schneekloth, W., Schulz, F., Selonke, B., Surrow, E., Tassi, T., Voß, D., Westphal, G., Wolf, U., Wollmer, C., Youngman, W., Zeuner Deutsches Elektronen Synchrotron DESY, D., 22603 Hamburg, Germany H. J., Grabosch, Mari, Stefano Maria, A., Meyer, S., Schlenstedt DESY IfH Zeuthen, D., 15738 Zeuthen, Germany G., Barbagli, E., Gallo, P., Pelfer University, Infn, Florence, Italy f. G., Maccarrone, S., De Pasquale, L., Votano INFN, Laboratori Nazionali di, Frascati, I., 00044 Frascati, Italy f. A., Bamberger, S., Eisenhardt, T., Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B., R., D. 79104 Freiburg i. B., R., Germany c. J. T., Bromley, N. H., Brook, P. J., Bussey, A. T., Doyle, D. H., Saxon, L. E., Sinclair, E., Strickland, M. L., Utley, R., Waugh, of Physics, A. S. Wilson D. e. p. t., Astronomy, University of, Glasgow, Glasgow G12, 8qq, U. K. o. A., Dannemann20, U., Holm, D., Horstmann, R., Sinkus21, K., Wick Hamburg University, Physics, I. Institute of E. x. p., D., 22761 Hamburg, Germany c. B. D., Burow22, L., Hagge16, E., Lohrmann, G., Poelz, W., Schott, F., Zetsche Hamburg University, Physics, I. I. Institute of E. x. p., Germany c. T. C., Bacon, N., Bru¨ mmer, I., Butterworth, V. L., Harri, G., Howell, B. H. Y., Hung, L., Lamberti23, K. R., Long, D. B., Miller, N., Pavel, A., Prinias24, J. K., Sedgbeer, D., Sideri, A. F., Whitfield Imperial College London, High Energy Nuclear Physics, Group, London SW7, 2bz, U. K. o. U., Mallik, M. Z., Wang, S. M., Wang, J. T., Wu University of Iowa, Physics, Astronomy, Dept, Iowa, City, Ia, 52242, USA p. P., Cloth, D., Filges Forschungszentrum Ju¨ lich, Institut fu¨ r., Kernphysik, D., 52405 Ju¨ lich, Germany S. H., An, G. H., Cho, B. J., Ko, S. B., Lee, S. W., Nam, H. S., Park, S. K., Park Korea University, Seoul 136, 701, Korea h. S., Kartik, H. J., Kim, R. R., Mcneil, W., Metcalf, V. K., Nadendla Louisiana State University, Baton, Rouge, LA 70803, 4001, USA p. F., Barreiro, J. P., Fernandez, R., Graciani, J. M., Herna´ndez, L., Herva´, L., Labarga, M., Martinez, J., del Peso, J., Puga, J., Terron, Auto´ noma Madrid, J. F. de Troco´ niz U. n. i. v. e. r., Depto de F´ısica Teo´, R´ıca, E., 28049 Madrid, Spain n. F., Corriveau, D. S., Hanna, J., Hartmann, L. W., Hung, J. N., Lim, C. G., Matthews25, W. N., Murray, A., Och, P. M., Patel, M., Riveline, D. G., Stair, M., St Laurent, R., Ullmann, G., Zacek25 McGill University, Montre´al, PQ H3A, 2t8, Canada, A, b. T., Tsurugai Meiji Gakuin University, Faculty of General, Education, Yokohama, 244, Japan V., Bashkirov, B. A., Dolgoshein, A., Stifutkin Moscow Engineering Physics Institute, RU 115 409, Moscow, Russia l. G. L., Bashindzhagyan26, P. F., Ermolov, L. K., Gladilin, Golubkov, Y. u. A., V. D., Kobrin, I. A., Korzhavina, V. A., Kuzmin, Lukina, O. Y. u., A. S., Proskuryakov, A. A., Savin, L. M., Shcheglova, A. N., Solomin, N. P., Zotov Moscow State University, Institute of Nuclear, Physic, RU 119 899, Moscow, Russia m. M., Botje, F., Chlebana, J., Engelen, M., de Kamp, P., Kooijman, A., Kruse, A., van Sighem, H., Tiecke, W., Verkerke, J., Vossebeld, M., Vreeswijk, L., Wigger, E., de Wolf, R., van Woudenberg27 NIKHEF, University of, Amsterdam, NL 1009 DB, Amsterdam, Netherlands i. D., Acosta, B., Bylsma, L. S., Durkin, J., Gilmore, C. M., Ginsburg, C. L., Kim, C., Li, T. Y., Ling, P., Nylander, I. H., Park, T. A., Romanowski28 Ohio State University, Physics, Department, Columbus, OH 43210, 1106, USA p. D. S., Bailey, R. J., Cashmore29, A. M., Cooper Sarkar, R. C. E., Devenish, N., Harnew, M., Lancaster30, L., Lindemann, J. D., Mcfall, C., Nath, V. A., Noyes24, A., Quadt, J. R., Tickner, H., Uijterwaal, R., Walczak, D. S., Water, F. F., Wilson, T., Yip Department of Physic, University of, Oxford, Oxford, U. K. o. A., Bertolin, R., Brugnera, R., Carlin, F., Dal Corso, M., De Giorgi, U., Dosselli, S., Limentani, M., Morandin, M., Posocco, L., Stanco, R., Stroili, C., Voci, F., Zuin Dipartimento di Fisica dell’ Universita, Infn, I., 35131 Padova, Italy f. J., Bulmahn, R. G., Feild31, B. Y., Oh, J. J., Whitmore Pennsylvania State University, University, Park, Pa, 16802, USA q. G., D’Agostini, G., Marini, A., Nigro Dipartimento di Fisica, ’La Sapienza’, U. n. i. v., I., 00185 Rome, Italy f. J. C., Hart, N. A., Mccubbin, T. P., Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11, 0qx, U. K. o. E., Barberi, T., Dubb, C., Heusch, M., Van Hook, W., Lockman, J. T., Rahn, H. F. W., Sadrozinski, A., Seiden, D. C., Williams University of California, Santa, Cruz, Ca, 93106, USA p. J., Biltzinger, R. J., Seifert, O., Schwarzer, A. H., Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D., 57012 Siegen, Germany c. H., Abramowicz, G., Briskin, S., Dagan32, T., Doeker32, A., Levy26 Raymond, Beverly Sackler Faculty of Exact, Science, School of, Physic, Tel Aviv, University, Tel Aviv, 69978, Israel e. J. I., Fleck33, M., Inuzuka, T., Ishii, M., Kuze, S., Mine, M., Nakao, I., Suzuki, K., Tokushuku, K., Umemori, S., Yamada, Y., Yamazaki Institute for Nuclear Study, University of, Tokyo, Tokyo, 113, Japan g. M., Chiba, R., Hamatsu, T., Hirose, K., Homma, S., Kitamura34, T., Matsushita, K., Yamauchi Tokyo Metropolitan University, Tokyo 192, 03, Japan g. R., Cirio, M., Costa, M. I., Ferrero, S., Maselli, C., Peroni, R., Sacchi, A., Solano, A., Staiano Universita di Torino, Dipartimento di Fisica, Sperimentale, I., 10129 Torino, Italy f. M., Dardo II Faculty of Science, Torino, University, Infn, Alessandria, Italy f. D. C., Bailey, F., Benard, M., Brkic, C. P., Fagerstroem, G. F., Hartner, K. K., Joo, G. M., Levman, J. F., Martin, R. S., Orr, S., Polenz, C. R., Sampson, D., Simmon, R. J., Teuscher University of Toronto, Toronto, ON M5S, 1a7, Canada a. J. M., Butterworth, C. D., Catterall, T. W., Jone, P. B., Kaziewicz, J. B., Lane, R. L., Saunder, J., Shulman, M. R., Sutton University College London, London WC1E, 6bt, U. K. o. B., Lu, L. W., Mo Virginia Polytechnic Inst, State, University, Physics, Dept, Blacksburg, Va, 24061, USA q. W., Bogusz, J., Ciborowski, J., Gajewski, G., Grzelak35, M., Kasprzak, M., Krzyz˙anowski, K., Muchorowski36, R. J., Nowak, J. M., Pawlak, T., Tymieniecka, A. K., Wro´ blewski, J. A., Zakrzewski, A. F., Z˙ arnecki Warsaw University, Institute of Experimental, Physic, PL 00681, Warsaw, Poland j. M., Adamus Institute for Nuclear Studie, Poland j. C., Coldewey, Y., Eisenberg32, D., Hochman, U., Karshon32, D., Revel32, D., Zer Zion Weizmann Institute, Nuclear Physics, Dept, Rehovot, 76100, Israel d. W. F., Badgett, J., Breitweg, D., Chapin, R., Cro, S., Dasu, C., Fouda, R. J., Lovele, S., Mattingly, D. D., Reeder, S., Silverstein, W. H., Smith, A., Vaiciuli, M., Wodarczyk University of Wisconsin, Madison, Wi, 53706, USA p. S., Bhadra, M. L., Cardy37, W. R., Frisken, M., Khakzad, W. B., Schmidke York University, North, York, Toronto ON M3J, 1p3, and Canada, A.
Abstract: Preliminary results are presented on the gluon density at low x obtained from a QCD analysis of ZEUS 1994 F-2 structure function data combined with those from NMC. Also given are estimates of the experimental error on the e(+) p NC Born cross section at large x and Q(2). This estimate is obtained from propagation of the statistical and systematic errors on fixed target structure functions.
Published: 1997

11. F-2(D(3)) measurements at ZEUS

Author: ZEUS Collaboration M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasin´ ski, J. Repond, R. Stanek, R. L. Ta laga, H. Zhang Argonne National Laboratory, Argonne, IL 60439, USA p. M. C. K. Mattingly Andrews University, Berrien Springs, USA F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini1, L. Cifarelli2, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, A. Polini, G. Sartorelli, Y. Zamora Garcia3, A. Zichichi University, INFN Bologna, I. 40126 Bologna, Italy f. C. Amelung, A. Bornheim, J. Crittenden, R. Deffner, M. Eckert, L. Feld, A. Frey4, M. Geerts5, M. Grothe, H. Hartmann, K. Heinloth, L. Heinz, E. Hilger, H. P. Jakob, U. F. Katz, S. Mengel6, E. Paul, M. Pfeiffer, C.h. Rembser, D. Schramm7, J. Stamm, R. Wedemeyer Physikalisches Institut der Universita¨t Bonn, D. 53115 Bonn, Germany c. S. Campbell Robson, A. Cassidy, W. N. Cottingham, N. Dyce, B. Foster, S. George, M. E. Hayes, G. P. Heath, H. F. Heath, D. Piccioni, D. G. Roff, R. J. Tapper, R. Yoshida H. H. Wills Physics Laboratory, University of Bristol, Bristol B58 1TL, U. K. o. M. Arneodo8, R. Ayad, M. Capua, A. Garfagnini, L. Iannotti, M. Schioppa, G. Susinno Calabria University, Physics D.e.p.t. and INFN, Cosenza, Italy f. A. Caldwell9, N. Cartiglia, Z. Jing, W. Liu, J. A. Parsons, S. Ritz10, F. Sciulli, P. B. Straub, L. Wai11, S. Yang12, Q. Zhu Columbia University, Nevis Labs, Irvington on Hudson, NY 10533, USA q. P. Borzemski, J. Chwastowski, A. Eskreys, Z. Jakubowski, M. B. Przybycien´, M. Zachara, L. Zawiejski I.n.s.t. of Nuclear Physics, PL 30055 Cracow, Poland j. L. Adamczyk, B. Bednarek, K. Jelen´, D. Kisielewska, T. Kowalski, M. Przybycien´, E. Rulikowska Zare¸bska, L. Suszycki, J. Zaja¸c Faculty of Physics, Nuclear Techniques, Academy of Mining, Metallurgy, Poland j. Z. Dulin´ ski, A. Kotan´ ski Jagellonian Univ, D.e.p.t. of Physics, PL 30059 Cracow, Poland k. G. Abbiendi13, L. A. T. Bauerdick, U. Behrens, H. Beier, J. K. Bienlein, G. Cases, O. Deppe, K. Desler, G. Drews, M. Flasin´ ski14, D. J. Gilkinson, C. Glasman, P. Go¨ ttlicher, J. Große Knetter, T. Haas, W. Hain, D. Hasell, H. Heßling, Y. Iga, K. F. Johnson15, P. Joos, M. Kasemann, R. Klanner, W. Koch, U. Ko¨ tz, H. Kowalski, J. Labs, A. Ladage, B. Lo¨ hr, M. Lo¨ we, D. Lu¨ ke, J. Mainusch16, O. Man´ czak, J. Milewski, T. Monteiro17, J. S. T. Ng, D. Notz, K. Ohrenberg, K. Piotrzkowski, M. Roco, M. Rohde, J. Rolda´n, U. Schneekloth, W. Schulz, F. Selonke, B. Surrow, E. Tassi, T. Voß, D. Westphal, G. Wolf, U. Wollmer, C. Youngman, W. Zeuner Deutsches Elektronen Synchrotron DESY, D. 22603 Hamburg, Germany H. J. Grabosch, S. M. Mari18, A. Meyer, S. Schlenstedt DESY IfH Zeuthen, D. 15738 Zeuthen, Germany G. Barbagli, E. Gallo, P. Pelfer University, INFN, Florence, Italy f. G. Maccarrone, S. De Pasquale, L. Votano INFN, Laboratori Nazionali di Frascati, I. 00044 Frascati, Italy f. A. Bamberger, S. Eisenhardt, T. Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B.r., D. 79104 Freiburg i. B.r., Germany c. J. T. Bromley, N. H. Brook, P. J. Bussey, A. T. Doyle, D. H. Saxon, L. E. Sinclair, E. Strickland, M. L. Utley, R. Waugh, A. S. Wilson D.e.p.t. of Physics, Astronomy, University of Glasgow, Glasgow G12 8QQ, U. K. o. A. Dannemann20, U. Holm, D. Horstmann, R. Sinkus21, K. Wick Hamburg University, I. Institute of E.x.p. Physics, D. 22761 Hamburg, Germany c. B. D. Burow22, L. Hagge16, E. Lohrmann, G. Poelz, W. Schott, F. Zetsche Hamburg University, I.I. Institute of E.x.p. Physics, Germany c. T. C. Bacon, N. Bru¨ mmer, I. Butterworth, V. L. Harris, G. Howell, B. H. Y. Hung, L. Lamberti23, K. R. Long, D. B. Miller, N. Pavel, A. Prinias24, J. K. Sedgbeer, D. Sideris, A. F. Whitfield Imperial College London, High Energy Nuclear Physics Group, London SW7 2BZ, U. K. o. U. Mallik, M. Z. Wang, S. M. Wang, J. T. Wu University of Iowa, Physics, Astronomy Dept, Iowa City, IA 52242, USA p. P. Cloth, D. Filges Forschungszentrum Ju¨ lich, Institut fu¨ r. Kernphysik, D. 52405 Ju¨ lich, Germany S. H. An, G. H. Cho, B. J. Ko, S. B. Lee, S. W. Nam, H. S. Park, S. K. Park Korea University, Seoul 136 701, Korea h. S. Kartik, H. J. Kim, R. R. McNeil, W. Metcalf, V. K. Nadendla Louisiana State University, Baton Rouge, LA 70803 4001, USA p. F. Barreiro, J. P. Fernandez, R. Graciani, J. M. Herna´ndez, L. Herva´s, L. Labarga, M. Martinez, J. del Peso, J. Puga, J. Terron, J. F. de Troco´ niz U.n.i.v.e.r. Auto´ noma Madrid, Depto de F´ısica Teo´ r´ıca, E. 28049 Madrid, Spain n. F. Corriveau, D. S. Hanna, J. Hartmann, L. W. Hung, J. N. Lim, C. G. Matthews25, W. N. Murray, A. Ochs, P. M. Patel, M. Riveline, D. G. Stairs, M. St Laurent, R. Ullmann, G. Zacek25 McGill University, Montre´al, PQ H3A 2T8, Canada a, b. T. Tsurugai Meiji Gakuin University, Faculty of General Education, Yokohama 244, Japan V. Bashkirov, B. A. Dolgoshein, A. Stifutkin Moscow Engineering Physics Institute, RU 115 409 Moscow, Russia l. G. L. Bashindzhagyan26, P. F. Ermolov, L. K. Gladilin, Y.u. A. Golubkov, V. D. Kobrin, I. A. Korzhavina, V. A. Kuzmin, O. Y.u. Lukina, A. S. Proskuryakov, A. A. Savin, L. M. Shcheglova, A. N. Solomin, N. P. Zotov Moscow State University, Institute of Nuclear Physics, RU 119 899 Moscow, Russia m. M. Botje, F. Chlebana, J. Engelen, M. de Kamps, P. Kooijman, A. Kruse, A. van Sighem, H. Tiecke, W. Verkerke, J. Vossebeld, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg27 NIKHEF, University of Amsterdam, NL 1009 DB Amsterdam, Netherlands i. D. Acosta, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, C. Li, T. Y. Ling, P. Nylander, I. H. Park, T. A. Romanowski28 Ohio State University, Physics Department, Columbus, OH 43210 1106, USA p. D. S. Bailey, R. J. Cashmore29, A. M. Cooper Sarkar, R. C. E. Devenish, N. Harnew, M. Lancaster30, L. Lindemann, J. D. McFall, C. Nath, V. A. Noyes24, A. Quadt, J. R. Tickner, H. Uijterwaal, R. Walczak, D. S. Waters, F. F. Wilson, T. Yip Department of Physics, University of Oxford, Oxford, U. K. o. A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, F. Zuin Dipartimento di Fisica dell’ Universita, INFN, I. 35131 Padova, Italy f. J. Bulmahn, R. G. Feild31, B. Y. Oh, J. J. Whitmore Pennsylvania State University, University Park, PA 16802, USA q. G. D’Agostini, G. Marini, A. Nigro Dipartimento di Fisica, U.n.i.v. ’La Sapienza’, I. 00185 Rome, Italy f. J. C. Hart, N. A. McCubbin, T. P. Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U. K. o. E. Barberis, T. Dubbs, C. Heusch, M. Van Hook, W. Lockman, J. T. Rahn, H. F. W. Sadrozinski, A. Seiden, D. C. Williams University of California, Santa Cruz, CA 93106, USA p. J. Biltzinger, R. J. Seifert, O. Schwarzer, A. H. Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D. 57012 Siegen, Germany c. H. Abramowicz, G. Briskin, S. Dagan32, T. Doeker32, A. Levy26 Raymond, Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv 69978, Israel e. J. I. Fleck33, M. Inuzuka, T. Ishii, M. Kuze, S. Mine, M. Nakao, I. Suzuki, K. Tokushuku, K. Umemori, S. Yamada, Y. Yamazaki Institute for Nuclear Study, University of Tokyo, Tokyo 113, Japan g. M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura34, T. Matsushita, K. Yamauchi Tokyo Metropolitan University, Tokyo 192 03, Japan g. R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano Universita di Torino, Dipartimento di Fisica Sperimentale, I. 10129 Torino, Italy f. M. Dardo II Faculty of Sciences, Torino University, INFN Alessandria, Italy f. D. C. Bailey, F. Benard, M. Brkic, C. P. Fagerstroem, G. F. Hartner, K. K. Joo, G. M. Levman, J. F. Martin, R. S. Orr, S. Polenz, C. R. Sampson, D. Simmons, R. J. Teuscher University of Toronto, Toronto, ON M5S 1A7, Canada a. J. M. Butterworth, C. D. Catterall, T. W. Jones, P. B. Kaziewicz, J. B. Lane, R. L. Saunders, J. Shulman, M. R. Sutton University College London, London WC1E 6BT, U. K. o. B. Lu, L. W. Mo Virginia Polytechnic Inst, State University, Physics Dept, Blacksburg, VA 24061, USA q. W. Bogusz, J. Ciborowski, J. Gajewski, G. Grzelak35, M. Kasprzak, M. Krzyz˙anowski, K. Muchorowski36, R. J. Nowak, J. M. Pawlak, T. ZEUS Collaboration M. Derrick, T. Tymieniecka, A. K. Wro´ blewski, J. A. Zakrzewski, A. F. Z˙ arnecki Warsaw University, Institute of Experimental Physics, PL 00681 Warsaw, Poland j. M. Adamus Institute for Nuclear Studies, Poland j. C. Coldewey, Y. Eisenberg32, D. Hochman, U. Karshon32, D. Revel32, D. Zer Zion Weizmann Institute, Nuclear Physics Dept, Rehovot 76100, Israel d. W. F. Badgett, J. Breitweg, D. Chapin, R. Cross, S. Dasu, C. Foudas, R. J. Loveless, S. Mattingly, D. D. Reeder, S. Silverstein, W. H. Smith, A. Vaiciulis, M. Wodarczyk University of Wisconsin, Madison, WI 53706, USA p. S. Bhadra, M. L. Cardy37, W. R. Frisken, M. Khakzad, W. B. Schmidke York University, North York, Toronto ON M3J 1P3, Canada a., MARI, Stefano Maria, ZEUS Collaboration M., Derrick, D., Krakauer, S., Magill, D., Mikuna, B., Musgrave, J. R., Okrasin´ ski, J., Repond, R., Stanek, R. L., Ta laga, H., Zhang Argonne National Laboratory, Argonne, Il, 60439, USA p. M. C. K., Mattingly Andrews University, Berrien, Spring, Mi, USA F., Anselmo, P., Antonioli, G., Bari, M., Basile, L., Bellagamba, D., Boscherini, A., Bruni, G., Bruni, P., Bruni, G., Cara Romeo, G., Castellini1, L., Cifarelli2, F., Cindolo, A., Contin, M., Corradi, I., Giala, P., Giusti, G., Iacobucci, G., Laurenti, G., Levi, A., Margotti, T., Massam, R., Nania, F., Palmonari, A., Pesci, A., Polini, G., Sartorelli, Y., Zamora Garcia3, A., Zichichi University, Infn, Bologna, I., 40126 Bologna, Italy f. C., Amelung, A., Bornheim, J., Crittenden, R., Deffner, M., Eckert, L., Feld, A., Frey4, M., Geerts5, M., Grothe, H., Hartmann, K., Heinloth, L., Heinz, E., Hilger, H. P., Jakob, U. F., Katz, S., Mengel6, E., Paul, M., Pfeiffer, Rembser, C. h., D., Schramm7, J., Stamm, R., Wedemeyer Physikalisches Institut der Universita¨t Bonn, D., 53115 Bonn, Germany c. S., Campbell Robson, A., Cassidy, W. N., Cottingham, N., Dyce, B., Foster, S., George, M. E., Haye, G. P., Heath, H. F., Heath, D., Piccioni, D. G., Roff, R. J., Tapper, R. Yoshida H. H., Wills Physics Laboratory, University of, Bristol, Bristol B58, 1tl, U. K. o. M., Arneodo8, R., Ayad, M., Capua, A., Garfagnini, L., Iannotti, M., Schioppa, G., Susinno Calabria University, and INFN, Physics D. e. p. t., Cosenza, Italy f. A., Caldwell9, N., Cartiglia, Z., Jing, W., Liu, J. A., Parson, S., Ritz10, F., Sciulli, P. B., Straub, L., Wai11, S., Yang12, Q., Zhu Columbia University, Nevis, Lab, Irvington on, Hudson, Ny, 10533, USA q. P., Borzemski, J., Chwastowski, A., Eskrey, Z., Jakubowski, M. B., Przybycien´, M., Zachara, of Nuclear Physics, L. Zawiejski I. n. s. t., PL 30055, Cracow, Poland j. L., Adamczyk, B., Bednarek, K., Jelen´, D., Kisielewska, T., Kowalski, M., Przybycien´, E., Rulikowska Zare¸bska, L., Suszycki, J., Zaja¸c Faculty of Physic, Nuclear, Technique, Academy of, Mining, Metallurgy, Poland j. Z., Dulin´ ski, A., Kotan´ ski Jagellonian Univ, of Physics, D. e. p. t., PL 30059, Cracow, Poland k. G., Abbiendi13, L. A. T., Bauerdick, U., Behren, H., Beier, J. K., Bienlein, G., Case, O., Deppe, K., Desler, G., Drew, M., Flasin´ ski14, D. J., Gilkinson, C., Glasman, P., Go¨ ttlicher, J., Große Knetter, T., Haa, W., Hain, D., Hasell, H., Heßling, Y., Iga, K. F., Johnson15, P., Joo, M., Kasemann, R., Klanner, W., Koch, U., Ko¨ tz, H., Kowalski, J., Lab, A., Ladage, B., Lo¨ hr, M., Lo¨ we, D., Lu¨ ke, J., Mainusch16, O., Man´ czak, J., Milewski, T., Monteiro17, J. S. T., Ng, D., Notz, K., Ohrenberg, K., Piotrzkowski, M., Roco, M., Rohde, J., Rolda´n, U., Schneekloth, W., Schulz, F., Selonke, B., Surrow, E., Tassi, T., Voß, D., Westphal, G., Wolf, U., Wollmer, C., Youngman, W., Zeuner Deutsches Elektronen Synchrotron DESY, D., 22603 Hamburg, Germany H. J., Grabosch, S. M., Mari18, A., Meyer, S., Schlenstedt DESY IfH Zeuthen, D., 15738 Zeuthen, Germany G., Barbagli, E., Gallo, P., Pelfer University, Infn, Florence, Italy f. G., Maccarrone, S., De Pasquale, L., Votano INFN, Laboratori Nazionali di, Frascati, I., 00044 Frascati, Italy f. A., Bamberger, S., Eisenhardt, T., Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B., R., D. 79104 Freiburg i. B., R., Germany c. J. T., Bromley, N. H., Brook, P. J., Bussey, A. T., Doyle, D. H., Saxon, L. E., Sinclair, E., Strickland, M. L., Utley, R., Waugh, of Physics, A. S. Wilson D. e. p. t., Astronomy, University of, Glasgow, Glasgow G12, 8qq, U. K. o. A., Dannemann20, U., Holm, D., Horstmann, R., Sinkus21, K., Wick Hamburg University, Physics, I. Institute of E. x. p., D., 22761 Hamburg, Germany c. B. D., Burow22, L., Hagge16, E., Lohrmann, G., Poelz, W., Schott, F., Zetsche Hamburg University, Physics, I. I. Institute of E. x. p., Germany c. T. C., Bacon, N., Bru¨ mmer, I., Butterworth, V. L., Harri, G., Howell, B. H. Y., Hung, L., Lamberti23, K. R., Long, D. B., Miller, N., Pavel, A., Prinias24, J. K., Sedgbeer, D., Sideri, A. F., Whitfield Imperial College London, High Energy Nuclear Physics, Group, London SW7, 2bz, U. K. o. U., Mallik, M. Z., Wang, S. M., Wang, J. T., Wu University of Iowa, Physics, Astronomy, Dept, Iowa, City, Ia, 52242, USA p. P., Cloth, D., Filges Forschungszentrum Ju¨ lich, Institut fu¨ r., Kernphysik, D., 52405 Ju¨ lich, Germany S. H., An, G. H., Cho, B. J., Ko, S. B., Lee, S. W., Nam, H. S., Park, S. K., Park Korea University, Seoul 136, 701, Korea h. S., Kartik, H. J., Kim, R. R., Mcneil, W., Metcalf, V. K., Nadendla Louisiana State University, Baton, Rouge, LA 70803, 4001, USA p. F., Barreiro, J. P., Fernandez, R., Graciani, J. M., Herna´ndez, L., Herva´, L., Labarga, M., Martinez, J., del Peso, J., Puga, J., Terron, Auto´ noma Madrid, J. F. de Troco´ niz U. n. i. v. e. r., Depto de F´ısica Teo´, R´ıca, E., 28049 Madrid, Spain n. F., Corriveau, D. S., Hanna, J., Hartmann, L. W., Hung, J. N., Lim, C. G., Matthews25, W. N., Murray, A., Och, P. M., Patel, M., Riveline, D. G., Stair, M., St Laurent, R., Ullmann, G., Zacek25 McGill University, Montre´al, PQ H3A, 2t8, Canada, A, b. T., Tsurugai Meiji Gakuin University, Faculty of General, Education, Yokohama, 244, Japan V., Bashkirov, B. A., Dolgoshein, A., Stifutkin Moscow Engineering Physics Institute, RU 115 409, Moscow, Russia l. G. L., Bashindzhagyan26, P. F., Ermolov, L. K., Gladilin, Golubkov, Y. u. A., V. D., Kobrin, I. A., Korzhavina, V. A., Kuzmin, Lukina, O. Y. u., A. S., Proskuryakov, A. A., Savin, L. M., Shcheglova, A. N., Solomin, N. P., Zotov Moscow State University, Institute of Nuclear, Physic, RU 119 899, Moscow, Russia m. M., Botje, F., Chlebana, J., Engelen, M., de Kamp, P., Kooijman, A., Kruse, A., van Sighem, H., Tiecke, W., Verkerke, J., Vossebeld, M., Vreeswijk, L., Wigger, E., de Wolf, R., van Woudenberg27 NIKHEF, University of, Amsterdam, NL 1009 DB, Amsterdam, Netherlands i. D., Acosta, B., Bylsma, L. S., Durkin, J., Gilmore, C. M., Ginsburg, C. L., Kim, C., Li, T. Y., Ling, P., Nylander, I. H., Park, T. A., Romanowski28 Ohio State University, Physics, Department, Columbus, OH 43210, 1106, USA p. D. S., Bailey, R. J., Cashmore29, A. M., Cooper Sarkar, R. C. E., Devenish, N., Harnew, M., Lancaster30, L., Lindemann, J. D., Mcfall, C., Nath, V. A., Noyes24, A., Quadt, J. R., Tickner, H., Uijterwaal, R., Walczak, D. S., Water, F. F., Wilson, T., Yip Department of Physic, University of, Oxford, Oxford, U. K. o. A., Bertolin, R., Brugnera, R., Carlin, F., Dal Corso, M., De Giorgi, U., Dosselli, S., Limentani, M., Morandin, M., Posocco, L., Stanco, R., Stroili, C., Voci, F., Zuin Dipartimento di Fisica dell’ Universita, Infn, I., 35131 Padova, Italy f. J., Bulmahn, R. G., Feild31, B. Y., Oh, J. J., Whitmore Pennsylvania State University, University, Park, Pa, 16802, USA q. G., D’Agostini, G., Marini, A., Nigro Dipartimento di Fisica, ’La Sapienza’, U. n. i. v., I., 00185 Rome, Italy f. J. C., Hart, N. A., Mccubbin, T. P., Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11, 0qx, U. K. o. E., Barberi, T., Dubb, C., Heusch, M., Van Hook, W., Lockman, J. T., Rahn, H. F. W., Sadrozinski, A., Seiden, D. C., Williams University of California, Santa, Cruz, Ca, 93106, USA p. J., Biltzinger, R. J., Seifert, O., Schwarzer, A. H., Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D., 57012 Siegen, Germany c. H., Abramowicz, G., Briskin, S., Dagan32, T., Doeker32, A., Levy26 Raymond, Beverly Sackler Faculty of Exact, Science, School of, Physic, Tel Aviv, University, Tel Aviv, 69978, Israel e. J. I., Fleck33, M., Inuzuka, T., Ishii, M., Kuze, S., Mine, M., Nakao, I., Suzuki, K., Tokushuku, K., Umemori, S., Yamada, Y., Yamazaki Institute for Nuclear Study, University of, Tokyo, Tokyo, 113, Japan g. M., Chiba, R., Hamatsu, T., Hirose, K., Homma, S., Kitamura34, T., Matsushita, K., Yamauchi Tokyo Metropolitan University, Tokyo 192, 03, Japan g. R., Cirio, M., Costa, M. I., Ferrero, S., Maselli, C., Peroni, R., Sacchi, A., Solano, A., Staiano Universita di Torino, Dipartimento di Fisica, Sperimentale, I., 10129 Torino, Italy f. M., Dardo II Faculty of Science, Torino, University, Infn, Alessandria, Italy f. D. C., Bailey, F., Benard, M., Brkic, C. P., Fagerstroem, G. F., Hartner, K. K., Joo, G. M., Levman, J. F., Martin, R. S., Orr, S., Polenz, C. R., Sampson, D., Simmon, R. J., Teuscher University of Toronto, Toronto, ON M5S, 1a7, Canada a. J. M., Butterworth, C. D., Catterall, T. W., Jone, P. B., Kaziewicz, J. B., Lane, R. L., Saunder, J., Shulman, M. R., Sutton University College London, London WC1E, 6bt, U. K. o. B., Lu, L. W., Mo Virginia Polytechnic Inst, State, University, Physics, Dept, Blacksburg, Va, 24061, USA q. W., Bogusz, J., Ciborowski, J., Gajewski, G., Grzelak35, M., Kasprzak, M., Krzyz˙anowski, K., Muchorowski36, R. J., Nowak, J. M., Pawlak, T. ZEUS Collaboration M., Derrick, Mari, Stefano Maria, T., Tymieniecka, A. K., Wro´ blewski, J. A., Zakrzewski, A. F., Z˙ arnecki Warsaw University, Institute of Experimental, Physic, PL 00681, Warsaw, Poland j. M., Adamus Institute for Nuclear Studie, Poland j. C., Coldewey, Y., Eisenberg32, D., Hochman, U., Karshon32, D., Revel32, D., Zer Zion Weizmann Institute, Nuclear Physics, Dept, Rehovot, 76100, Israel d. W. F., Badgett, J., Breitweg, D., Chapin, R., Cro, S., Dasu, C., Fouda, R. J., Lovele, S., Mattingly, D. D., Reeder, S., Silverstein, W. H., Smith, A., Vaiciuli, M., Wodarczyk University of Wisconsin, Madison, Wi, 53706, USA p. S., Bhadra, M. L., Cardy37, W. R., Frisken, M., Khakzad, W. B., Schmidke York University, North, York, Toronto ON M3J, 1p3, and Canada, A.
Abstract: Results on the diffractive structure function F-2(D(3)) in deep inelastic neutral current positron-proton scattering (DIS) have been obtained by the ZEUS collaboration using two different methods. Diffractive interactions are selected by either requiring a small, not exponentially suppressed invariant hadronic mass M-X in the main detector or by detecting a fast proton in the ZEUS leading proton spectrometer (LPS). The results of the two methods are compared.
Published: 1997

12. Measurement of dijets in DIS and comparison to NLO calculations

Author: ZEUS Collaboration M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasin´ ski, J. Repond, R. Stanek, R. L. Ta laga, H. Zhang Argonne National Laboratory, Argonne, IL 60439, USA p. M. C. K. Mattingly Andrews University, Berrien Springs, USA F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini1, L. Cifarelli2, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, A. Polini, G. Sartorelli, Y. Zamora Garcia3, A. Zichichi University, INFN Bologna, I. 40126 Bologna, Italy f. C. Amelung, A. Bornheim, J. Crittenden, R. Deffner, M. Eckert, L. Feld, A. Frey4, M. Geerts5, M. Grothe, H. Hartmann, K. Heinloth, L. Heinz, E. Hilger, H. P. Jakob, U. F. Katz, S. Mengel6, E. Paul, M. Pfeiffer, C.h. Rembser, D. Schramm7, J. Stamm, R. Wedemeyer Physikalisches Institut der Universita¨t Bonn, D. 53115 Bonn, Germany c. S. Campbell Robson, A. Cassidy, W. N. Cottingham, N. Dyce, B. Foster, S. George, M. E. Hayes, G. P. Heath, H. F. Heath, D. Piccioni, D. G. Roff, R. J. Tapper, R. Yoshida H. H. Wills Physics Laboratory, University of Bristol, Bristol B58 1TL, U. K. o. M. Arneodo8, R. Ayad, M. Capua, A. Garfagnini, L. Iannotti, M. Schioppa, G. Susinno Calabria University, Physics D.e.p.t. and INFN, Cosenza, Italy f. A. Caldwell9, N. Cartiglia, Z. Jing, W. Liu, J. A. Parsons, S. Ritz10, F. Sciulli, P. B. Straub, L. Wai11, S. Yang12, Q. Zhu Columbia University, Nevis Labs, Irvington on Hudson, NY 10533, USA q. P. Borzemski, J. Chwastowski, A. Eskreys, Z. Jakubowski, M. B. Przybycien´, M. Zachara, L. Zawiejski I.n.s.t. of Nuclear Physics, PL 30055 Cracow, Poland j. L. Adamczyk, B. Bednarek, K. Jelen´, D. Kisielewska, T. Kowalski, M. Przybycien´, E. Rulikowska Zare¸bska, L. Suszycki, J. Zaja¸c Faculty of Physics, Nuclear Techniques, Academy of Mining, Metallurgy, Poland j. Z. Dulin´ ski, A. Kotan´ ski Jagellonian Univ, D.e.p.t. of Physics, PL 30059 Cracow, Poland k. G. Abbiendi13, L. A. T. Bauerdick, U. Behrens, H. Beier, J. K. Bienlein, G. Cases, O. Deppe, K. Desler, G. Drews, M. Flasin´ ski14, D. J. Gilkinson, C. Glasman, P. Go¨ ttlicher, J. Große Knetter, T. Haas, W. Hain, D. Hasell, H. Heßling, Y. Iga, K. F. Johnson15, P. Joos, M. Kasemann, R. Klanner, W. Koch, U. Ko¨ tz, H. Kowalski, J. Labs, A. Ladage, B. Lo¨ hr, M. Lo¨ we, D. Lu¨ ke, J. Mainusch16, O. Man´ czak, J. Milewski, T. Monteiro17, J. S. T. Ng, D. Notz, K. Ohrenberg, K. Piotrzkowski, M. Roco, M. Rohde, J. Rolda´n, U. Schneekloth, W. Schulz, F. Selonke, B. Surrow, E. Tassi, T. Voß, D. Westphal, G. Wolf, U. Wollmer, C. Youngman, W. Zeuner Deutsches Elektronen Synchrotron DESY, D. 22603 Hamburg, Germany H. J. Grabosch, A. Meyer, S. Schlenstedt DESY IfH Zeuthen, D. 15738 Zeuthen, Germany G. Barbagli, E. Gallo, P. Pelfer University, INFN, Florence, Italy f. G. Maccarrone, S. De Pasquale, L. Votano INFN, Laboratori Nazionali di Frascati, I. 00044 Frascati, Italy f. A. Bamberger, S. Eisenhardt, T. Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B.r., D. 79104 Freiburg i. B.r., Germany c. J. T. Bromley, N. H. Brook, P. J. Bussey, A. T. Doyle, D. H. Saxon, L. E. Sinclair, E. Strickland, M. L. Utley, R. Waugh, A. S. Wilson D.e.p.t. of Physics, Astronomy, University of Glasgow, Glasgow G12 8QQ, U. K. o. A. Dannemann20, U. Holm, D. Horstmann, R. Sinkus21, K. Wick Hamburg University, I. Institute of E.x.p. Physics, D. 22761 Hamburg, Germany c. B. D. Burow22, L. Hagge16, E. Lohrmann, G. Poelz, W. Schott, F. Zetsche Hamburg University, I.I. Institute of E.x.p. Physics, Germany c. T. C. Bacon, N. Bru¨ mmer, I. Butterworth, V. L. Harris, G. Howell, B. H. Y. Hung, L. Lamberti23, K. R. Long, D. B. Miller, N. Pavel, A. Prinias24, J. K. Sedgbeer, D. Sideris, A. F. Whitfield Imperial College London, High Energy Nuclear Physics Group, London SW7 2BZ, U. K. o. U. Mallik, M. Z. Wang, S. M. Wang, J. T. Wu University of Iowa, Physics, Astronomy Dept, Iowa City, IA 52242, USA p. P. Cloth, D. Filges Forschungszentrum Ju¨ lich, Institut fu¨ r. Kernphysik, D. 52405 Ju¨ lich, Germany S. H. An, G. H. Cho, B. J. Ko, S. B. Lee, S. W. Nam, H. S. Park, S. K. Park Korea University, Seoul 136 701, Korea h. S. Kartik, H. J. Kim, R. R. McNeil, W. Metcalf, V. K. Nadendla Louisiana State University, Baton Rouge, LA 70803 4001, USA p. F. Barreiro, J. P. Fernandez, R. Graciani, J. M. Herna´ndez, L. Herva´s, L. Labarga, M. Martinez, J. del Peso, J. Puga, J. Terron, J. F. de Troco´ niz U.n.i.v.e.r. Auto´ noma Madrid, Depto de F´ısica Teo´ r´ıca, E. 28049 Madrid, Spain n. F. Corriveau, D. S. Hanna, J. Hartmann, L. W. Hung, J. N. Lim, C. G. Matthews25, W. N. Murray, A. Ochs, P. M. Patel, M. Riveline, D. G. Stairs, M. St Laurent, R. Ullmann, G. Zacek25 McGill University, Montre´al, PQ H3A 2T8, Canada a, b. T. Tsurugai Meiji Gakuin University, Faculty of General Education, Yokohama 244, Japan V. Bashkirov, B. A. Dolgoshein, A. Stifutkin Moscow Engineering Physics Institute, RU 115 409 Moscow, Russia l. G. L. Bashindzhagyan26, P. F. Ermolov, L. K. Gladilin, Y.u. A. Golubkov, V. D. Kobrin, I. A. Korzhavina, V. A. Kuzmin, O. Y.u. Lukina, A. S. Proskuryakov, A. A. Savin, L. M. Shcheglova, A. N. Solomin, N. P. Zotov Moscow State University, Institute of Nuclear Physics, RU 119 899 Moscow, Russia m. M. Botje, F. Chlebana, J. Engelen, M. de Kamps, P. Kooijman, A. Kruse, A. van Sighem, H. Tiecke, W. Verkerke, J. Vossebeld, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg27 NIKHEF, University of Amsterdam, NL 1009 DB Amsterdam, Netherlands i. D. Acosta, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, C. Li, T. Y. Ling, P. Nylander, I. H. Park, T. A. Romanowski28 Ohio State University, Physics Department, Columbus, OH 43210 1106, USA p. D. S. Bailey, R. J. Cashmore29, A. M. Cooper Sarkar, R. C. E. Devenish, N. Harnew, M. Lancaster30, L. Lindemann, J. D. McFall, C. Nath, V. A. Noyes24, A. Quadt, J. R. Tickner, H. Uijterwaal, R. Walczak, D. S. Waters, F. F. Wilson, T. Yip Department of Physics, University of Oxford, Oxford, U. K. o. A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, F. Zuin Dipartimento di Fisica dell’ Universita, INFN, I. 35131 Padova, Italy f. J. Bulmahn, R. G. Feild31, B. Y. Oh, J. J. Whitmore Pennsylvania State University, University Park, PA 16802, USA q. G. D’Agostini, G. Marini, A. Nigro Dipartimento di Fisica, U.n.i.v. ’La Sapienza’, I. 00185 Rome, Italy f. J. C. Hart, N. A. McCubbin, T. P. Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U. K. o. E. Barberis, T. Dubbs, C. Heusch, M. Van Hook, W. Lockman, J. T. Rahn, H. F. W. Sadrozinski, A. Seiden, D. C. Williams University of California, Santa Cruz, CA 93106, USA p. J. Biltzinger, R. J. Seifert, O. Schwarzer, A. H. Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D. 57012 Siegen, Germany c. H. Abramowicz, G. Briskin, S. Dagan32, T. Doeker32, A. Levy26 Raymond, Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv 69978, Israel e. J. I. Fleck33, M. Inuzuka, T. Ishii, M. Kuze, S. Mine, M. Nakao, I. Suzuki, K. Tokushuku, K. Umemori, S. Yamada, Y. Yamazaki Institute for Nuclear Study, University of Tokyo, Tokyo 113, Japan g. M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura34, T. Matsushita, K. Yamauchi Tokyo Metropolitan University, Tokyo 192 03, Japan g. R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano Universita di Torino, Dipartimento di Fisica Sperimentale, I. 10129 Torino, Italy f. M. Dardo II Faculty of Sciences, Torino University, INFN Alessandria, Italy f. D. C. Bailey, F. Benard, M. Brkic, C. P. Fagerstroem, G. F. Hartner, K. K. Joo, G. M. Levman, J. F. Martin, R. S. Orr, S. Polenz, C. R. Sampson, D. Simmons, R. J. Teuscher University of Toronto, Toronto, ON M5S 1A7, Canada a. J. M. Butterworth, C. D. Catterall, T. W. Jones, P. B. Kaziewicz, J. B. Lane, R. L. Saunders, J. Shulman, M. R. Sutton University College London, London WC1E 6BT, U. K. o. B. Lu, L. W. Mo Virginia Polytechnic Inst, State University, Physics Dept, Blacksburg, VA 24061, USA q. W. Bogusz, J. Ciborowski, J. Gajewski, G. Grzelak35, M. Kasprzak, M. Krzyz˙anowski, K. Muchorowski36, R. J. Nowak, J. M. Pawlak, T. Tymieniecka, A. K. Wro´ blewski, J. A. Zakrzewski, A. F. Z˙ arnecki Warsaw University, Institute of Experimental Physics, PL 00681 Warsaw, Poland j. M. Adamus Institute for Nuclear Studies, Poland j. C. Coldewey, Y. Eisenberg32, D. Hochman, U. Karshon32, D. Revel32, D. Zer Zion Weizmann Institute, Nuclear Physics Dept, Rehovot 76100, Israel d. W. F. Badgett, J. Breitweg, D. Chapin, R. Cross, S. Dasu, C. Foudas, R. J. Loveless, S. Mattingly, D. D. Reeder, S. Silverstein, W. H. Smith, A. Vaiciulis, M. Wodarczyk University of Wisconsin, Madison, WI 53706, USA p. S. Bhadra, M. L. Cardy37, W. R. Frisken, M. Khakzad, W. B. Schmidke York University, North York, Toronto ON M3J 1P3, Canada a., MARI, Stefano Maria, ZEUS Collaboration M., Derrick, D., Krakauer, S., Magill, D., Mikuna, B., Musgrave, J. R., Okrasin´ ski, J., Repond, R., Stanek, R. L., Ta laga, H., Zhang Argonne National Laboratory, Argonne, Il, 60439, USA p. M. C. K., Mattingly Andrews University, Berrien, Spring, Mi, USA F., Anselmo, P., Antonioli, G., Bari, M., Basile, L., Bellagamba, D., Boscherini, A., Bruni, G., Bruni, P., Bruni, G., Cara Romeo, G., Castellini1, L., Cifarelli2, F., Cindolo, A., Contin, M., Corradi, I., Giala, P., Giusti, G., Iacobucci, G., Laurenti, G., Levi, A., Margotti, T., Massam, R., Nania, F., Palmonari, A., Pesci, A., Polini, G., Sartorelli, Y., Zamora Garcia3, A., Zichichi University, Infn, Bologna, I., 40126 Bologna, Italy f. C., Amelung, A., Bornheim, J., Crittenden, R., Deffner, M., Eckert, L., Feld, A., Frey4, M., Geerts5, M., Grothe, H., Hartmann, K., Heinloth, L., Heinz, E., Hilger, H. P., Jakob, U. F., Katz, S., Mengel6, E., Paul, M., Pfeiffer, Rembser, C. h., D., Schramm7, J., Stamm, R., Wedemeyer Physikalisches Institut der Universita¨t Bonn, D., 53115 Bonn, Germany c. S., Campbell Robson, A., Cassidy, W. N., Cottingham, N., Dyce, B., Foster, S., George, M. E., Haye, G. P., Heath, H. F., Heath, D., Piccioni, D. G., Roff, R. J., Tapper, R. Yoshida H. H., Wills Physics Laboratory, University of, Bristol, Bristol B58, 1tl, U. K. o. M., Arneodo8, R., Ayad, M., Capua, A., Garfagnini, L., Iannotti, M., Schioppa, G., Susinno Calabria University, and INFN, Physics D. e. p. t., Cosenza, Italy f. A., Caldwell9, N., Cartiglia, Z., Jing, W., Liu, J. A., Parson, S., Ritz10, F., Sciulli, P. B., Straub, L., Wai11, S., Yang12, Q., Zhu Columbia University, Nevis, Lab, Irvington on, Hudson, Ny, 10533, USA q. P., Borzemski, J., Chwastowski, A., Eskrey, Z., Jakubowski, M. B., Przybycien´, M., Zachara, of Nuclear Physics, L. Zawiejski I. n. s. t., PL 30055, Cracow, Poland j. L., Adamczyk, B., Bednarek, K., Jelen´, D., Kisielewska, T., Kowalski, M., Przybycien´, E., Rulikowska Zare¸bska, L., Suszycki, J., Zaja¸c Faculty of Physic, Nuclear, Technique, Academy of, Mining, Metallurgy, Poland j. Z., Dulin´ ski, A., Kotan´ ski Jagellonian Univ, of Physics, D. e. p. t., PL 30059, Cracow, Poland k. G., Abbiendi13, L. A. T., Bauerdick, U., Behren, H., Beier, J. K., Bienlein, G., Case, O., Deppe, K., Desler, G., Drew, M., Flasin´ ski14, D. J., Gilkinson, C., Glasman, P., Go¨ ttlicher, J., Große Knetter, T., Haa, W., Hain, D., Hasell, H., Heßling, Y., Iga, K. F., Johnson15, P., Joo, M., Kasemann, R., Klanner, W., Koch, U., Ko¨ tz, H., Kowalski, J., Lab, A., Ladage, B., Lo¨ hr, M., Lo¨ we, D., Lu¨ ke, J., Mainusch16, O., Man´ czak, J., Milewski, T., Monteiro17, J. S. T., Ng, D., Notz, K., Ohrenberg, K., Piotrzkowski, M., Roco, M., Rohde, J., Rolda´n, U., Schneekloth, W., Schulz, F., Selonke, B., Surrow, E., Tassi, T., Voß, D., Westphal, G., Wolf, U., Wollmer, C., Youngman, W., Zeuner Deutsches Elektronen Synchrotron DESY, D., 22603 Hamburg, Germany H. J., Grabosch, Mari, Stefano Maria, A., Meyer, S., Schlenstedt DESY IfH Zeuthen, D., 15738 Zeuthen, Germany G., Barbagli, E., Gallo, P., Pelfer University, Infn, Florence, Italy f. G., Maccarrone, S., De Pasquale, L., Votano INFN, Laboratori Nazionali di, Frascati, I., 00044 Frascati, Italy f. A., Bamberger, S., Eisenhardt, T., Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B., R., D. 79104 Freiburg i. B., R., Germany c. J. T., Bromley, N. H., Brook, P. J., Bussey, A. T., Doyle, D. H., Saxon, L. E., Sinclair, E., Strickland, M. L., Utley, R., Waugh, of Physics, A. S. Wilson D. e. p. t., Astronomy, University of, Glasgow, Glasgow G12, 8qq, U. K. o. A., Dannemann20, U., Holm, D., Horstmann, R., Sinkus21, K., Wick Hamburg University, Physics, I. Institute of E. x. p., D., 22761 Hamburg, Germany c. B. D., Burow22, L., Hagge16, E., Lohrmann, G., Poelz, W., Schott, F., Zetsche Hamburg University, Physics, I. I. Institute of E. x. p., Germany c. T. C., Bacon, N., Bru¨ mmer, I., Butterworth, V. L., Harri, G., Howell, B. H. Y., Hung, L., Lamberti23, K. R., Long, D. B., Miller, N., Pavel, A., Prinias24, J. K., Sedgbeer, D., Sideri, A. F., Whitfield Imperial College London, High Energy Nuclear Physics, Group, London SW7, 2bz, U. K. o. U., Mallik, M. Z., Wang, S. M., Wang, J. T., Wu University of Iowa, Physics, Astronomy, Dept, Iowa, City, Ia, 52242, USA p. P., Cloth, D., Filges Forschungszentrum Ju¨ lich, Institut fu¨ r., Kernphysik, D., 52405 Ju¨ lich, Germany S. H., An, G. H., Cho, B. J., Ko, S. B., Lee, S. W., Nam, H. S., Park, S. K., Park Korea University, Seoul 136, 701, Korea h. S., Kartik, H. J., Kim, R. R., Mcneil, W., Metcalf, V. K., Nadendla Louisiana State University, Baton, Rouge, LA 70803, 4001, USA p. F., Barreiro, J. P., Fernandez, R., Graciani, J. M., Herna´ndez, L., Herva´, L., Labarga, M., Martinez, J., del Peso, J., Puga, J., Terron, Auto´ noma Madrid, J. F. de Troco´ niz U. n. i. v. e. r., Depto de F´ısica Teo´, R´ıca, E., 28049 Madrid, Spain n. F., Corriveau, D. S., Hanna, J., Hartmann, L. W., Hung, J. N., Lim, C. G., Matthews25, W. N., Murray, A., Och, P. M., Patel, M., Riveline, D. G., Stair, M., St Laurent, R., Ullmann, G., Zacek25 McGill University, Montre´al, PQ H3A, 2t8, Canada, A, b. T., Tsurugai Meiji Gakuin University, Faculty of General, Education, Yokohama, 244, Japan V., Bashkirov, B. A., Dolgoshein, A., Stifutkin Moscow Engineering Physics Institute, RU 115 409, Moscow, Russia l. G. L., Bashindzhagyan26, P. F., Ermolov, L. K., Gladilin, Golubkov, Y. u. A., V. D., Kobrin, I. A., Korzhavina, V. A., Kuzmin, Lukina, O. Y. u., A. S., Proskuryakov, A. A., Savin, L. M., Shcheglova, A. N., Solomin, N. P., Zotov Moscow State University, Institute of Nuclear, Physic, RU 119 899, Moscow, Russia m. M., Botje, F., Chlebana, J., Engelen, M., de Kamp, P., Kooijman, A., Kruse, A., van Sighem, H., Tiecke, W., Verkerke, J., Vossebeld, M., Vreeswijk, L., Wigger, E., de Wolf, R., van Woudenberg27 NIKHEF, University of, Amsterdam, NL 1009 DB, Amsterdam, Netherlands i. D., Acosta, B., Bylsma, L. S., Durkin, J., Gilmore, C. M., Ginsburg, C. L., Kim, C., Li, T. Y., Ling, P., Nylander, I. H., Park, T. A., Romanowski28 Ohio State University, Physics, Department, Columbus, OH 43210, 1106, USA p. D. S., Bailey, R. J., Cashmore29, A. M., Cooper Sarkar, R. C. E., Devenish, N., Harnew, M., Lancaster30, L., Lindemann, J. D., Mcfall, C., Nath, V. A., Noyes24, A., Quadt, J. R., Tickner, H., Uijterwaal, R., Walczak, D. S., Water, F. F., Wilson, T., Yip Department of Physic, University of, Oxford, Oxford, U. K. o. A., Bertolin, R., Brugnera, R., Carlin, F., Dal Corso, M., De Giorgi, U., Dosselli, S., Limentani, M., Morandin, M., Posocco, L., Stanco, R., Stroili, C., Voci, F., Zuin Dipartimento di Fisica dell’ Universita, Infn, I., 35131 Padova, Italy f. J., Bulmahn, R. G., Feild31, B. Y., Oh, J. J., Whitmore Pennsylvania State University, University, Park, Pa, 16802, USA q. G., D’Agostini, G., Marini, A., Nigro Dipartimento di Fisica, ’La Sapienza’, U. n. i. v., I., 00185 Rome, Italy f. J. C., Hart, N. A., Mccubbin, T. P., Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11, 0qx, U. K. o. E., Barberi, T., Dubb, C., Heusch, M., Van Hook, W., Lockman, J. T., Rahn, H. F. W., Sadrozinski, A., Seiden, D. C., Williams University of California, Santa, Cruz, Ca, 93106, USA p. J., Biltzinger, R. J., Seifert, O., Schwarzer, A. H., Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D., 57012 Siegen, Germany c. H., Abramowicz, G., Briskin, S., Dagan32, T., Doeker32, A., Levy26 Raymond, Beverly Sackler Faculty of Exact, Science, School of, Physic, Tel Aviv, University, Tel Aviv, 69978, Israel e. J. I., Fleck33, M., Inuzuka, T., Ishii, M., Kuze, S., Mine, M., Nakao, I., Suzuki, K., Tokushuku, K., Umemori, S., Yamada, Y., Yamazaki Institute for Nuclear Study, University of, Tokyo, Tokyo, 113, Japan g. M., Chiba, R., Hamatsu, T., Hirose, K., Homma, S., Kitamura34, T., Matsushita, K., Yamauchi Tokyo Metropolitan University, Tokyo 192, 03, Japan g. R., Cirio, M., Costa, M. I., Ferrero, S., Maselli, C., Peroni, R., Sacchi, A., Solano, A., Staiano Universita di Torino, Dipartimento di Fisica, Sperimentale, I., 10129 Torino, Italy f. M., Dardo II Faculty of Science, Torino, University, Infn, Alessandria, Italy f. D. C., Bailey, F., Benard, M., Brkic, C. P., Fagerstroem, G. F., Hartner, K. K., Joo, G. M., Levman, J. F., Martin, R. S., Orr, S., Polenz, C. R., Sampson, D., Simmon, R. J., Teuscher University of Toronto, Toronto, ON M5S, 1a7, Canada a. J. M., Butterworth, C. D., Catterall, T. W., Jone, P. B., Kaziewicz, J. B., Lane, R. L., Saunder, J., Shulman, M. R., Sutton University College London, London WC1E, 6bt, U. K. o. B., Lu, L. W., Mo Virginia Polytechnic Inst, State, University, Physics, Dept, Blacksburg, Va, 24061, USA q. W., Bogusz, J., Ciborowski, J., Gajewski, G., Grzelak35, M., Kasprzak, M., Krzyz˙anowski, K., Muchorowski36, R. J., Nowak, J. M., Pawlak, T., Tymieniecka, A. K., Wro´ blewski, J. A., Zakrzewski, A. F., Z˙ arnecki Warsaw University, Institute of Experimental, Physic, PL 00681, Warsaw, Poland j. M., Adamus Institute for Nuclear Studie, Poland j. C., Coldewey, Y., Eisenberg32, D., Hochman, U., Karshon32, D., Revel32, D., Zer Zion Weizmann Institute, Nuclear Physics, Dept, Rehovot, 76100, Israel d. W. F., Badgett, J., Breitweg, D., Chapin, R., Cro, S., Dasu, C., Fouda, R. J., Lovele, S., Mattingly, D. D., Reeder, S., Silverstein, W. H., Smith, A., Vaiciuli, M., Wodarczyk University of Wisconsin, Madison, Wi, 53706, USA p. S., Bhadra, M. L., Cardy37, W. R., Frisken, M., Khakzad, W. B., Schmidke York University, North, York, Toronto ON M3J, 1p3, and Canada, A.
Abstract: We report a measurement of the dijet production cross section in neutral current deep inelastic scattering with the ZEUS detector at the HERA ep collider. Dijet events are identified with the cone algorithm and the results are compared to next-to-leading order perturbative QCD calculations. The systematic uncertainties of both the measurement and the calculation we discussed.
Published: 1997

13. Searches at HERA for excited fermions, contact interactions, a heavy neutrino, and: a HERA excess?

Author: ZEUS Collaboration M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasin´ ski, J. Repond, R. Stanek, R. L. Ta laga, H. Zhang Argonne National Laboratory, Argonne, IL 60439, USA p. M. C. K. Mattingly Andrews University, Berrien Springs, USA F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini1, L. Cifarelli2, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, A. Polini, G. Sartorelli, Y. Zamora Garcia3, A. Zichichi University, INFN Bologna, I. 40126 Bologna, Italy f. C. Amelung, A. Bornheim, J. Crittenden, R. Deffner, M. Eckert, L. Feld, A. Frey4, M. Geerts5, M. Grothe, H. Hartmann, K. Heinloth, L. Heinz, E. Hilger, H. P. Jakob, U. F. Katz, S. Mengel6, E. Paul, M. Pfeiffer, C.h. Rembser, D. Schramm7, J. Stamm, R. Wedemeyer Physikalisches Institut der Universita¨t Bonn, D. 53115 Bonn, Germany c. S. Campbell Robson, A. Cassidy, W. N. Cottingham, N. Dyce, B. Foster, S. George, M. E. Hayes, G. P. Heath, H. F. Heath, D. Piccioni, D. G. Roff, R. J. Tapper, R. Yoshida H. H. Wills Physics Laboratory, University of Bristol, Bristol B58 1TL, U. K. o. M. Arneodo8, R. Ayad, M. Capua, A. Garfagnini, L. Iannotti, M. Schioppa, G. Susinno Calabria University, Physics D.e.p.t. and INFN, Cosenza, Italy f. A. Caldwell9, N. Cartiglia, Z. Jing, W. Liu, J. A. Parsons, S. Ritz10, F. Sciulli, P. B. Straub, L. Wai11, S. Yang12, Q. Zhu Columbia University, Nevis Labs, Irvington on Hudson, NY 10533, USA q. P. Borzemski, J. Chwastowski, A. Eskreys, Z. Jakubowski, M. B. Przybycien´, M. Zachara, L. Zawiejski I.n.s.t. of Nuclear Physics, PL 30055 Cracow, Poland j. L. Adamczyk, B. Bednarek, K. Jelen´, D. Kisielewska, T. Kowalski, M. Przybycien´, E. Rulikowska Zare¸bska, L. Suszycki, J. Zaja¸c Faculty of Physics, Nuclear Techniques, Academy of Mining, Metallurgy, Poland j. Z. Dulin´ ski, A. Kotan´ ski Jagellonian Univ, D.e.p.t. of Physics, PL 30059 Cracow, Poland k. G. Abbiendi13, L. A. T. Bauerdick, U. Behrens, H. Beier, J. K. Bienlein, G. Cases, O. Deppe, K. Desler, G. Drews, M. Flasin´ ski14, D. J. Gilkinson, C. Glasman, P. Go¨ ttlicher, J. Große Knetter, T. Haas, W. Hain, D. Hasell, H. Heßling, Y. Iga, K. F. Johnson15, P. Joos, M. Kasemann, R. Klanner, W. Koch, U. Ko¨ tz, H. Kowalski, J. Labs, A. Ladage, B. Lo¨ hr, M. Lo¨ we, D. Lu¨ ke, J. Mainusch16, O. Man´ czak, J. Milewski, T. Monteiro17, J. S. T. Ng, D. Notz, K. Ohrenberg, K. Piotrzkowski, M. Roco, M. Rohde, J. Rolda´n, U. Schneekloth, W. Schulz, F. Selonke, B. Surrow, E. Tassi, T. Voß, D. Westphal, G. Wolf, U. Wollmer, C. Youngman, W. Zeuner Deutsches Elektronen Synchrotron DESY, D. 22603 Hamburg, Germany H. J. Grabosch, A. Meyer, S. Schlenstedt DESY IfH Zeuthen, D. 15738 Zeuthen, Germany G. Barbagli, E. Gallo, P. Pelfer University, INFN, Florence, Italy f. G. Maccarrone, S. De Pasquale, L. Votano INFN, Laboratori Nazionali di Frascati, I. 00044 Frascati, Italy f. A. Bamberger, S. Eisenhardt, T. Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B.r., D. 79104 Freiburg i. B.r., Germany c. J. T. Bromley, N. H. Brook, P. J. Bussey, A. T. Doyle, D. H. Saxon, L. E. Sinclair, E. Strickland, M. L. Utley, R. Waugh, A. S. Wilson D.e.p.t. of Physics, Astronomy, University of Glasgow, Glasgow G12 8QQ, U. K. o. A. Dannemann20, U. Holm, D. Horstmann, R. Sinkus21, K. Wick Hamburg University, I. Institute of E.x.p. Physics, D. 22761 Hamburg, Germany c. B. D. Burow22, L. Hagge16, E. Lohrmann, G. Poelz, W. Schott, F. Zetsche Hamburg University, I.I. Institute of E.x.p. Physics, Germany c. T. C. Bacon, N. Bru¨ mmer, I. Butterworth, V. L. Harris, G. Howell, B. H. Y. Hung, L. Lamberti23, K. R. Long, D. B. Miller, N. Pavel, A. Prinias24, J. K. Sedgbeer, D. Sideris, A. F. Whitfield Imperial College London, High Energy Nuclear Physics Group, London SW7 2BZ, U. K. o. U. Mallik, M. Z. Wang, S. M. Wang, J. T. Wu University of Iowa, Physics, Astronomy Dept, Iowa City, IA 52242, USA p. P. Cloth, D. Filges Forschungszentrum Ju¨ lich, Institut fu¨ r. Kernphysik, D. 52405 Ju¨ lich, Germany S. H. An, G. H. Cho, B. J. Ko, S. B. Lee, S. W. Nam, H. S. Park, S. K. Park Korea University, Seoul 136 701, Korea h. S. Kartik, H. J. Kim, R. R. McNeil, W. Metcalf, V. K. Nadendla Louisiana State University, Baton Rouge, LA 70803 4001, USA p. F. Barreiro, J. P. Fernandez, R. Graciani, J. M. Herna´ndez, L. Herva´s, L. Labarga, M. Martinez, J. del Peso, J. Puga, J. Terron, J. F. de Troco´ niz U.n.i.v.e.r. Auto´ noma Madrid, Depto de F´ısica Teo´ r´ıca, E. 28049 Madrid, Spain n. F. Corriveau, D. S. Hanna, J. Hartmann, L. W. Hung, J. N. Lim, C. G. Matthews25, W. N. Murray, A. Ochs, P. M. Patel, M. Riveline, D. G. Stairs, M. St Laurent, R. Ullmann, G. Zacek25 McGill University, Montre´al, PQ H3A 2T8, Canada a, b. T. Tsurugai Meiji Gakuin University, Faculty of General Education, Yokohama 244, Japan V. Bashkirov, B. A. Dolgoshein, A. Stifutkin Moscow Engineering Physics Institute, RU 115 409 Moscow, Russia l. G. L. Bashindzhagyan26, P. F. Ermolov, L. K. Gladilin, Y.u. A. Golubkov, V. D. Kobrin, I. A. Korzhavina, V. A. Kuzmin, O. Y.u. Lukina, A. S. Proskuryakov, A. A. Savin, L. M. Shcheglova, A. N. Solomin, N. P. Zotov Moscow State University, Institute of Nuclear Physics, RU 119 899 Moscow, Russia m. M. Botje, F. Chlebana, J. Engelen, M. de Kamps, P. Kooijman, A. Kruse, A. van Sighem, H. Tiecke, W. Verkerke, J. Vossebeld, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg27 NIKHEF, University of Amsterdam, NL 1009 DB Amsterdam, Netherlands i. D. Acosta, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, C. Li, T. Y. Ling, P. Nylander, I. H. Park, T. A. Romanowski28 Ohio State University, Physics Department, Columbus, OH 43210 1106, USA p. D. S. Bailey, R. J. Cashmore29, A. M. Cooper Sarkar, R. C. E. Devenish, N. Harnew, M. Lancaster30, L. Lindemann, J. D. McFall, C. Nath, V. A. Noyes24, A. Quadt, J. R. Tickner, H. Uijterwaal, R. Walczak, D. S. Waters, F. F. Wilson, T. Yip Department of Physics, University of Oxford, Oxford, U. K. o. A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, F. Zuin Dipartimento di Fisica dell’ Universita, INFN, I. 35131 Padova, Italy f. J. Bulmahn, R. G. Feild31, B. Y. Oh, J. J. Whitmore Pennsylvania State University, University Park, PA 16802, USA q. G. D’Agostini, G. Marini, A. Nigro Dipartimento di Fisica, U.n.i.v. ’La Sapienza’, I. 00185 Rome, Italy f. J. C. Hart, N. A. McCubbin, T. P. Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U. K. o. E. Barberis, T. Dubbs, C. Heusch, M. Van Hook, W. Lockman, J. T. Rahn, H. F. W. Sadrozinski, A. Seiden, D. C. Williams University of California, Santa Cruz, CA 93106, USA p. J. Biltzinger, R. J. Seifert, O. Schwarzer, A. H. Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D. 57012 Siegen, Germany c. H. Abramowicz, G. Briskin, S. Dagan32, T. Doeker32, A. Levy26 Raymond, Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv 69978, Israel e. J. I. Fleck33, M. Inuzuka, T. Ishii, M. Kuze, S. Mine, M. Nakao, I. Suzuki, K. Tokushuku, K. Umemori, S. Yamada, Y. Yamazaki Institute for Nuclear Study, University of Tokyo, Tokyo 113, Japan g. M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura34, T. Matsushita, K. Yamauchi Tokyo Metropolitan University, Tokyo 192 03, Japan g. R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano Universita di Torino, Dipartimento di Fisica Sperimentale, I. 10129 Torino, Italy f. M. Dardo II Faculty of Sciences, Torino University, INFN Alessandria, Italy f. D. C. Bailey, F. Benard, M. Brkic, C. P. Fagerstroem, G. F. Hartner, K. K. Joo, G. M. Levman, J. F. Martin, R. S. Orr, S. Polenz, C. R. Sampson, D. Simmons, R. J. Teuscher University of Toronto, Toronto, ON M5S 1A7, Canada a. J. M. Butterworth, C. D. Catterall, T. W. Jones, P. B. Kaziewicz, J. B. Lane, R. L. Saunders, J. Shulman, M. R. Sutton University College London, London WC1E 6BT, U. K. o. B. Lu, L. W. Mo Virginia Polytechnic Inst, State University, Physics Dept, Blacksburg, VA 24061, USA q. W. Bogusz, J. Ciborowski, J. Gajewski, G. Grzelak35, M. Kasprzak, M. Krzyz˙anowski, K. Muchorowski36, R. J. Nowak, J. M. Pawlak, T. Tymieniecka, A. K. Wro´ blewski, J. A. Zakrzewski, A. F. Z˙ arnecki Warsaw University, Institute of Experimental Physics, PL 00681 Warsaw, Poland j. M. Adamus Institute for Nuclear Studies, Poland j. C. Coldewey, Y. Eisenberg32, D. Hochman, U. Karshon32, D. Revel32, D. Zer Zion Weizmann Institute, Nuclear Physics Dept, Rehovot 76100, Israel d. W. F. Badgett, J. Breitweg, D. Chapin, R. Cross, S. Dasu, C. Foudas, R. J. Loveless, S. Mattingly, D. D. Reeder, S. Silverstein, W. H. Smith, A. Vaiciulis, M. Wodarczyk University of Wisconsin, Madison, WI 53706, USA p. S. Bhadra, M. L. Cardy37, W. R. Frisken, M. Khakzad, W. B. Schmidke York University, North York, Toronto ON M3J 1P3, Canada a., MARI, Stefano Maria, ZEUS Collaboration M., Derrick, D., Krakauer, S., Magill, D., Mikuna, B., Musgrave, J. R., Okrasin´ ski, J., Repond, R., Stanek, R. L., Ta laga, H., Zhang Argonne National Laboratory, Argonne, Il, 60439, USA p. M. C. K., Mattingly Andrews University, Berrien, Spring, Mi, USA F., Anselmo, P., Antonioli, G., Bari, M., Basile, L., Bellagamba, D., Boscherini, A., Bruni, G., Bruni, P., Bruni, G., Cara Romeo, G., Castellini1, L., Cifarelli2, F., Cindolo, A., Contin, M., Corradi, I., Giala, P., Giusti, G., Iacobucci, G., Laurenti, G., Levi, A., Margotti, T., Massam, R., Nania, F., Palmonari, A., Pesci, A., Polini, G., Sartorelli, Y., Zamora Garcia3, A., Zichichi University, Infn, Bologna, I., 40126 Bologna, Italy f. C., Amelung, A., Bornheim, J., Crittenden, R., Deffner, M., Eckert, L., Feld, A., Frey4, M., Geerts5, M., Grothe, H., Hartmann, K., Heinloth, L., Heinz, E., Hilger, H. P., Jakob, U. F., Katz, S., Mengel6, E., Paul, M., Pfeiffer, Rembser, C. h., D., Schramm7, J., Stamm, R., Wedemeyer Physikalisches Institut der Universita¨t Bonn, D., 53115 Bonn, Germany c. S., Campbell Robson, A., Cassidy, W. N., Cottingham, N., Dyce, B., Foster, S., George, M. E., Haye, G. P., Heath, H. F., Heath, D., Piccioni, D. G., Roff, R. J., Tapper, R. Yoshida H. H., Wills Physics Laboratory, University of, Bristol, Bristol B58, 1tl, U. K. o. M., Arneodo8, R., Ayad, M., Capua, A., Garfagnini, L., Iannotti, M., Schioppa, G., Susinno Calabria University, and INFN, Physics D. e. p. t., Cosenza, Italy f. A., Caldwell9, N., Cartiglia, Z., Jing, W., Liu, J. A., Parson, S., Ritz10, F., Sciulli, P. B., Straub, L., Wai11, S., Yang12, Q., Zhu Columbia University, Nevis, Lab, Irvington on, Hudson, Ny, 10533, USA q. P., Borzemski, J., Chwastowski, A., Eskrey, Z., Jakubowski, M. B., Przybycien´, M., Zachara, of Nuclear Physics, L. Zawiejski I. n. s. t., PL 30055, Cracow, Poland j. L., Adamczyk, B., Bednarek, K., Jelen´, D., Kisielewska, T., Kowalski, M., Przybycien´, E., Rulikowska Zare¸bska, L., Suszycki, J., Zaja¸c Faculty of Physic, Nuclear, Technique, Academy of, Mining, Metallurgy, Poland j. Z., Dulin´ ski, A., Kotan´ ski Jagellonian Univ, of Physics, D. e. p. t., PL 30059, Cracow, Poland k. G., Abbiendi13, L. A. T., Bauerdick, U., Behren, H., Beier, J. K., Bienlein, G., Case, O., Deppe, K., Desler, G., Drew, M., Flasin´ ski14, D. J., Gilkinson, C., Glasman, P., Go¨ ttlicher, J., Große Knetter, T., Haa, W., Hain, D., Hasell, H., Heßling, Y., Iga, K. F., Johnson15, P., Joo, M., Kasemann, R., Klanner, W., Koch, U., Ko¨ tz, H., Kowalski, J., Lab, A., Ladage, B., Lo¨ hr, M., Lo¨ we, D., Lu¨ ke, J., Mainusch16, O., Man´ czak, J., Milewski, T., Monteiro17, J. S. T., Ng, D., Notz, K., Ohrenberg, K., Piotrzkowski, M., Roco, M., Rohde, J., Rolda´n, U., Schneekloth, W., Schulz, F., Selonke, B., Surrow, E., Tassi, T., Voß, D., Westphal, G., Wolf, U., Wollmer, C., Youngman, W., Zeuner Deutsches Elektronen Synchrotron DESY, D., 22603 Hamburg, Germany H. J., Grabosch, Mari, Stefano Maria, A., Meyer, S., Schlenstedt DESY IfH Zeuthen, D., 15738 Zeuthen, Germany G., Barbagli, E., Gallo, P., Pelfer University, Infn, Florence, Italy f. G., Maccarrone, S., De Pasquale, L., Votano INFN, Laboratori Nazionali di, Frascati, I., 00044 Frascati, Italy f. A., Bamberger, S., Eisenhardt, T., Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B., R., D. 79104 Freiburg i. B., R., Germany c. J. T., Bromley, N. H., Brook, P. J., Bussey, A. T., Doyle, D. H., Saxon, L. E., Sinclair, E., Strickland, M. L., Utley, R., Waugh, of Physics, A. S. Wilson D. e. p. t., Astronomy, University of, Glasgow, Glasgow G12, 8qq, U. K. o. A., Dannemann20, U., Holm, D., Horstmann, R., Sinkus21, K., Wick Hamburg University, Physics, I. Institute of E. x. p., D., 22761 Hamburg, Germany c. B. D., Burow22, L., Hagge16, E., Lohrmann, G., Poelz, W., Schott, F., Zetsche Hamburg University, Physics, I. I. Institute of E. x. p., Germany c. T. C., Bacon, N., Bru¨ mmer, I., Butterworth, V. L., Harri, G., Howell, B. H. Y., Hung, L., Lamberti23, K. R., Long, D. B., Miller, N., Pavel, A., Prinias24, J. K., Sedgbeer, D., Sideri, A. F., Whitfield Imperial College London, High Energy Nuclear Physics, Group, London SW7, 2bz, U. K. o. U., Mallik, M. Z., Wang, S. M., Wang, J. T., Wu University of Iowa, Physics, Astronomy, Dept, Iowa, City, Ia, 52242, USA p. P., Cloth, D., Filges Forschungszentrum Ju¨ lich, Institut fu¨ r., Kernphysik, D., 52405 Ju¨ lich, Germany S. H., An, G. H., Cho, B. J., Ko, S. B., Lee, S. W., Nam, H. S., Park, S. K., Park Korea University, Seoul 136, 701, Korea h. S., Kartik, H. J., Kim, R. R., Mcneil, W., Metcalf, V. K., Nadendla Louisiana State University, Baton, Rouge, LA 70803, 4001, USA p. F., Barreiro, J. P., Fernandez, R., Graciani, J. M., Herna´ndez, L., Herva´, L., Labarga, M., Martinez, J., del Peso, J., Puga, J., Terron, Auto´ noma Madrid, J. F. de Troco´ niz U. n. i. v. e. r., Depto de F´ısica Teo´, R´ıca, E., 28049 Madrid, Spain n. F., Corriveau, D. S., Hanna, J., Hartmann, L. W., Hung, J. N., Lim, C. G., Matthews25, W. N., Murray, A., Och, P. M., Patel, M., Riveline, D. G., Stair, M., St Laurent, R., Ullmann, G., Zacek25 McGill University, Montre´al, PQ H3A, 2t8, Canada, A, b. T., Tsurugai Meiji Gakuin University, Faculty of General, Education, Yokohama, 244, Japan V., Bashkirov, B. A., Dolgoshein, A., Stifutkin Moscow Engineering Physics Institute, RU 115 409, Moscow, Russia l. G. L., Bashindzhagyan26, P. F., Ermolov, L. K., Gladilin, Golubkov, Y. u. A., V. D., Kobrin, I. A., Korzhavina, V. A., Kuzmin, Lukina, O. Y. u., A. S., Proskuryakov, A. A., Savin, L. M., Shcheglova, A. N., Solomin, N. P., Zotov Moscow State University, Institute of Nuclear, Physic, RU 119 899, Moscow, Russia m. M., Botje, F., Chlebana, J., Engelen, M., de Kamp, P., Kooijman, A., Kruse, A., van Sighem, H., Tiecke, W., Verkerke, J., Vossebeld, M., Vreeswijk, L., Wigger, E., de Wolf, R., van Woudenberg27 NIKHEF, University of, Amsterdam, NL 1009 DB, Amsterdam, Netherlands i. D., Acosta, B., Bylsma, L. S., Durkin, J., Gilmore, C. M., Ginsburg, C. L., Kim, C., Li, T. Y., Ling, P., Nylander, I. H., Park, T. A., Romanowski28 Ohio State University, Physics, Department, Columbus, OH 43210, 1106, USA p. D. S., Bailey, R. J., Cashmore29, A. M., Cooper Sarkar, R. C. E., Devenish, N., Harnew, M., Lancaster30, L., Lindemann, J. D., Mcfall, C., Nath, V. A., Noyes24, A., Quadt, J. R., Tickner, H., Uijterwaal, R., Walczak, D. S., Water, F. F., Wilson, T., Yip Department of Physic, University of, Oxford, Oxford, U. K. o. A., Bertolin, R., Brugnera, R., Carlin, F., Dal Corso, M., De Giorgi, U., Dosselli, S., Limentani, M., Morandin, M., Posocco, L., Stanco, R., Stroili, C., Voci, F., Zuin Dipartimento di Fisica dell’ Universita, Infn, I., 35131 Padova, Italy f. J., Bulmahn, R. G., Feild31, B. Y., Oh, J. J., Whitmore Pennsylvania State University, University, Park, Pa, 16802, USA q. G., D’Agostini, G., Marini, A., Nigro Dipartimento di Fisica, ’La Sapienza’, U. n. i. v., I., 00185 Rome, Italy f. J. C., Hart, N. A., Mccubbin, T. P., Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11, 0qx, U. K. o. E., Barberi, T., Dubb, C., Heusch, M., Van Hook, W., Lockman, J. T., Rahn, H. F. W., Sadrozinski, A., Seiden, D. C., Williams University of California, Santa, Cruz, Ca, 93106, USA p. J., Biltzinger, R. J., Seifert, O., Schwarzer, A. H., Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D., 57012 Siegen, Germany c. H., Abramowicz, G., Briskin, S., Dagan32, T., Doeker32, A., Levy26 Raymond, Beverly Sackler Faculty of Exact, Science, School of, Physic, Tel Aviv, University, Tel Aviv, 69978, Israel e. J. I., Fleck33, M., Inuzuka, T., Ishii, M., Kuze, S., Mine, M., Nakao, I., Suzuki, K., Tokushuku, K., Umemori, S., Yamada, Y., Yamazaki Institute for Nuclear Study, University of, Tokyo, Tokyo, 113, Japan g. M., Chiba, R., Hamatsu, T., Hirose, K., Homma, S., Kitamura34, T., Matsushita, K., Yamauchi Tokyo Metropolitan University, Tokyo 192, 03, Japan g. R., Cirio, M., Costa, M. I., Ferrero, S., Maselli, C., Peroni, R., Sacchi, A., Solano, A., Staiano Universita di Torino, Dipartimento di Fisica, Sperimentale, I., 10129 Torino, Italy f. M., Dardo II Faculty of Science, Torino, University, Infn, Alessandria, Italy f. D. C., Bailey, F., Benard, M., Brkic, C. P., Fagerstroem, G. F., Hartner, K. K., Joo, G. M., Levman, J. F., Martin, R. S., Orr, S., Polenz, C. R., Sampson, D., Simmon, R. J., Teuscher University of Toronto, Toronto, ON M5S, 1a7, Canada a. J. M., Butterworth, C. D., Catterall, T. W., Jone, P. B., Kaziewicz, J. B., Lane, R. L., Saunder, J., Shulman, M. R., Sutton University College London, London WC1E, 6bt, U. K. o. B., Lu, L. W., Mo Virginia Polytechnic Inst, State, University, Physics, Dept, Blacksburg, Va, 24061, USA q. W., Bogusz, J., Ciborowski, J., Gajewski, G., Grzelak35, M., Kasprzak, M., Krzyz˙anowski, K., Muchorowski36, R. J., Nowak, J. M., Pawlak, T., Tymieniecka, A. K., Wro´ blewski, J. A., Zakrzewski, A. F., Z˙ arnecki Warsaw University, Institute of Experimental, Physic, PL 00681, Warsaw, Poland j. M., Adamus Institute for Nuclear Studie, Poland j. C., Coldewey, Y., Eisenberg32, D., Hochman, U., Karshon32, D., Revel32, D., Zer Zion Weizmann Institute, Nuclear Physics, Dept, Rehovot, 76100, Israel d. W. F., Badgett, J., Breitweg, D., Chapin, R., Cro, S., Dasu, C., Fouda, R. J., Lovele, S., Mattingly, D. D., Reeder, S., Silverstein, W. H., Smith, A., Vaiciuli, M., Wodarczyk University of Wisconsin, Madison, Wi, 53706, USA p. S., Bhadra, M. L., Cardy37, W. R., Frisken, M., Khakzad, W. B., Schmidke York University, North, York, Toronto ON M3J, 1p3, and Canada, A.
Subjects: Condensed Matter::Quantum Gases, High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: Results are presented on a number of searches for new physics in ep collisions at HERA using the ZEUS and HI detectors. Limits are presented on the production of elicited fermions, contact interactions, as well as a heavy right handed neutrino and W-R boson. Also presented are ZEUS results on the excess of events at high x and Q(2).
Published: 1997

14. Event shape analysis of multihadronic final states in deep inelastic rapidity gap events at HERA

Author: ZEUS Collaboration M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasin´ ski, J. Repond, R. Stanek, R. L. Ta laga, H. Zhang Argonne National Laboratory, Argonne, IL 60439, USA p. M. C. K. Mattingly Andrews University, Berrien Springs, USA F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini1, L. Cifarelli2, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, A. Polini, G. Sartorelli, Y. Zamora Garcia3, A. Zichichi University, INFN Bologna, I. 40126 Bologna, Italy f. C. Amelung, A. Bornheim, J. Crittenden, R. Deffner, M. Eckert, L. Feld, A. Frey4, M. Geerts5, M. Grothe, H. Hartmann, K. Heinloth, L. Heinz, E. Hilger, H. P. Jakob, U. F. Katz, S. Mengel6, E. Paul, M. Pfeiffer, C.h. Rembser, D. Schramm7, J. Stamm, R. Wedemeyer Physikalisches Institut der Universita¨t Bonn, D. 53115 Bonn, Germany c. S. Campbell Robson, A. Cassidy, W. N. Cottingham, N. Dyce, B. Foster, S. George, M. E. Hayes, G. P. Heath, H. F. Heath, D. Piccioni, D. G. Roff, R. J. Tapper, R. Yoshida H. H. Wills Physics Laboratory, University of Bristol, Bristol B58 1TL, U. K. o. M. Arneodo8, R. Ayad, M. Capua, A. Garfagnini, L. Iannotti, M. Schioppa, G. Susinno Calabria University, Physics D.e.p.t. and INFN, Cosenza, Italy f. A. Caldwell9, N. Cartiglia, Z. Jing, W. Liu, J. A. Parsons, S. Ritz10, F. Sciulli, P. B. Straub, L. Wai11, S. Yang12, Q. Zhu Columbia University, Nevis Labs, Irvington on Hudson, NY 10533, USA q. P. Borzemski, J. Chwastowski, A. Eskreys, Z. Jakubowski, M. B. Przybycien´, M. Zachara, L. Zawiejski I.n.s.t. of Nuclear Physics, PL 30055 Cracow, Poland j. L. Adamczyk, B. Bednarek, K. Jelen´, D. Kisielewska, T. Kowalski, M. Przybycien´, E. Rulikowska Zare¸bska, L. Suszycki, J. Zaja¸c Faculty of Physics, Nuclear Techniques, Academy of Mining, Metallurgy, Poland j. Z. Dulin´ ski, A. Kotan´ ski Jagellonian Univ, D.e.p.t. of Physics, PL 30059 Cracow, Poland k. G. Abbiendi13, L. A. T. Bauerdick, U. Behrens, H. Beier, J. K. Bienlein, G. Cases, O. Deppe, K. Desler, G. Drews, M. Flasin´ ski14, D. J. Gilkinson, C. Glasman, P. Go¨ ttlicher, J. Große Knetter, T. Haas, W. Hain, D. Hasell, H. Heßling, Y. Iga, K. F. Johnson15, P. Joos, M. Kasemann, R. Klanner, W. Koch, U. Ko¨ tz, H. Kowalski, J. Labs, A. Ladage, B. Lo¨ hr, M. Lo¨ we, D. Lu¨ ke, J. Mainusch16, O. Man´ czak, J. Milewski, T. Monteiro17, J. S. T. Ng, D. Notz, K. Ohrenberg, K. Piotrzkowski, M. Roco, M. Rohde, J. Rolda´n, U. Schneekloth, W. Schulz, F. Selonke, B. Surrow, E. Tassi, T. Voß, D. Westphal, G. Wolf, U. Wollmer, C. Youngman, W. Zeuner Deutsches Elektronen Synchrotron DESY, D. 22603 Hamburg, Germany H. J. Grabosch, A. Meyer, S. Schlenstedt DESY IfH Zeuthen, D. 15738 Zeuthen, Germany G. Barbagli, E. Gallo, P. Pelfer University, INFN, Florence, Italy f. G. Maccarrone, S. De Pasquale, L. Votano INFN, Laboratori Nazionali di Frascati, I. 00044 Frascati, Italy f. A. Bamberger, S. Eisenhardt, T. Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B.r., D. 79104 Freiburg i. B.r., Germany c. J. T. Bromley, N. H. Brook, P. J. Bussey, A. T. Doyle, D. H. Saxon, L. E. Sinclair, E. Strickland, M. L. Utley, R. Waugh, A. S. Wilson D.e.p.t. of Physics, Astronomy, University of Glasgow, Glasgow G12 8QQ, U. K. o. A. Dannemann20, U. Holm, D. Horstmann, R. Sinkus21, K. Wick Hamburg University, I. Institute of E.x.p. Physics, D. 22761 Hamburg, Germany c. B. D. Burow22, L. Hagge16, E. Lohrmann, G. Poelz, W. Schott, F. Zetsche Hamburg University, I.I. Institute of E.x.p. Physics, Germany c. T. C. Bacon, N. Bru¨ mmer, I. Butterworth, V. L. Harris, G. Howell, B. H. Y. Hung, L. Lamberti23, K. R. Long, D. B. Miller, N. Pavel, A. Prinias24, J. K. Sedgbeer, D. Sideris, A. F. Whitfield Imperial College London, High Energy Nuclear Physics Group, London SW7 2BZ, U. K. o. U. Mallik, M. Z. Wang, S. M. Wang, J. T. Wu University of Iowa, Physics, Astronomy Dept, Iowa City, IA 52242, USA p. P. Cloth, D. Filges Forschungszentrum Ju¨ lich, Institut fu¨ r. Kernphysik, D. 52405 Ju¨ lich, Germany S. H. An, G. H. Cho, B. J. Ko, S. B. Lee, S. W. Nam, H. S. Park, S. K. Park Korea University, Seoul 136 701, Korea h. S. Kartik, H. J. Kim, R. R. McNeil, W. Metcalf, V. K. Nadendla Louisiana State University, Baton Rouge, LA 70803 4001, USA p. F. Barreiro, J. P. Fernandez, R. Graciani, J. M. Herna´ndez, L. Herva´s, L. Labarga, M. Martinez, J. del Peso, J. Puga, J. Terron, J. F. de Troco´ niz U.n.i.v.e.r. Auto´ noma Madrid, Depto de F´ısica Teo´ r´ıca, E. 28049 Madrid, Spain n. F. Corriveau, D. S. Hanna, J. Hartmann, L. W. Hung, J. N. Lim, C. G. Matthews25, W. N. Murray, A. Ochs, P. M. Patel, M. Riveline, D. G. Stairs, M. St Laurent, R. Ullmann, G. Zacek25 McGill University, Montre´al, PQ H3A 2T8, Canada a, b. T. Tsurugai Meiji Gakuin University, Faculty of General Education, Yokohama 244, Japan V. Bashkirov, B. A. Dolgoshein, A. Stifutkin Moscow Engineering Physics Institute, RU 115 409 Moscow, Russia l. G. L. Bashindzhagyan26, P. F. Ermolov, L. K. Gladilin, Y.u. A. Golubkov, V. D. Kobrin, I. A. Korzhavina, V. A. Kuzmin, O. Y.u. Lukina, A. S. Proskuryakov, A. A. Savin, L. M. Shcheglova, A. N. Solomin, N. P. Zotov Moscow State University, Institute of Nuclear Physics, RU 119 899 Moscow, Russia m. M. Botje, F. Chlebana, J. Engelen, M. de Kamps, P. Kooijman, A. Kruse, A. van Sighem, H. Tiecke, W. Verkerke, J. Vossebeld, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg27 NIKHEF, University of Amsterdam, NL 1009 DB Amsterdam, Netherlands i. D. Acosta, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, C. Li, T. Y. Ling, P. Nylander, I. H. Park, T. A. Romanowski28 Ohio State University, Physics Department, Columbus, OH 43210 1106, USA p. D. S. Bailey, R. J. Cashmore29, A. M. Cooper Sarkar, R. C. E. Devenish, N. Harnew, M. Lancaster30, L. Lindemann, J. D. McFall, C. Nath, V. A. Noyes24, A. Quadt, J. R. Tickner, H. Uijterwaal, R. Walczak, D. S. Waters, F. F. Wilson, T. Yip Department of Physics, University of Oxford, Oxford, U. K. o. A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, F. Zuin Dipartimento di Fisica dell’ Universita, INFN, I. 35131 Padova, Italy f. J. Bulmahn, R. G. Feild31, B. Y. Oh, J. J. Whitmore Pennsylvania State University, University Park, PA 16802, USA q. G. D’Agostini, G. Marini, A. Nigro Dipartimento di Fisica, U.n.i.v. ’La Sapienza’, I. 00185 Rome, Italy f. J. C. Hart, N. A. McCubbin, T. P. Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U. K. o. E. Barberis, T. Dubbs, C. Heusch, M. Van Hook, W. Lockman, J. T. Rahn, H. F. W. Sadrozinski, A. Seiden, D. C. Williams University of California, Santa Cruz, CA 93106, USA p. J. Biltzinger, R. J. Seifert, O. Schwarzer, A. H. Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D. 57012 Siegen, Germany c. H. Abramowicz, G. Briskin, S. Dagan32, T. Doeker32, A. Levy26 Raymond, Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv 69978, Israel e. J. I. Fleck33, M. Inuzuka, T. Ishii, M. Kuze, S. Mine, M. Nakao, I. Suzuki, K. Tokushuku, K. Umemori, S. Yamada, Y. Yamazaki Institute for Nuclear Study, University of Tokyo, Tokyo 113, Japan g. M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura34, T. Matsushita, K. Yamauchi Tokyo Metropolitan University, Tokyo 192 03, Japan g. R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano Universita di Torino, Dipartimento di Fisica Sperimentale, I. 10129 Torino, Italy f. M. Dardo II Faculty of Sciences, Torino University, INFN Alessandria, Italy f. D. C. Bailey, F. Benard, M. Brkic, C. P. Fagerstroem, G. F. Hartner, K. K. Joo, G. M. Levman, J. F. Martin, R. S. Orr, S. Polenz, C. R. Sampson, D. Simmons, R. J. Teuscher University of Toronto, Toronto, ON M5S 1A7, Canada a. J. M. Butterworth, C. D. Catterall, T. W. Jones, P. B. Kaziewicz, J. B. Lane, R. L. Saunders, J. Shulman, M. R. Sutton University College London, London WC1E 6BT, U. K. o. B. Lu, L. W. Mo Virginia Polytechnic Inst, State University, Physics Dept, Blacksburg, VA 24061, USA q. W. Bogusz, J. Ciborowski, J. Gajewski, G. Grzelak35, M. Kasprzak, M. Krzyz˙anowski, K. Muchorowski36, R. J. Nowak, J. M. Pawlak, T. Tymieniecka, A. K. Wro´ blewski, J. A. Zakrzewski, A. F. Z˙ arnecki Warsaw University, Institute of Experimental Physics, PL 00681 Warsaw, Poland j. M. Adamus Institute for Nuclear Studies, Poland j. C. Coldewey, Y. Eisenberg32, D. Hochman, U. Karshon32, D. Revel32, D. Zer Zion Weizmann Institute, Nuclear Physics Dept, Rehovot 76100, Israel d. W. F. Badgett, J. Breitweg, D. Chapin, R. Cross, S. Dasu, C. Foudas, R. J. Loveless, S. Mattingly, D. D. Reeder, S. Silverstein, W. H. Smith, A. Vaiciulis, M. Wodarczyk University of Wisconsin, Madison, WI 53706, USA p. S. Bhadra, M. L. Cardy37, W. R. Frisken, M. Khakzad, W. B. Schmidke York University, North York, Toronto ON M3J 1P3, Canada a., MARI, Stefano Maria, ZEUS Collaboration M., Derrick, D., Krakauer, S., Magill, D., Mikuna, B., Musgrave, J. R., Okrasin´ ski, J., Repond, R., Stanek, R. L., Ta laga, H., Zhang Argonne National Laboratory, Argonne, Il, 60439, USA p. M. C. K., Mattingly Andrews University, Berrien, Spring, Mi, USA F., Anselmo, P., Antonioli, G., Bari, M., Basile, L., Bellagamba, D., Boscherini, A., Bruni, G., Bruni, P., Bruni, G., Cara Romeo, G., Castellini1, L., Cifarelli2, F., Cindolo, A., Contin, M., Corradi, I., Giala, P., Giusti, G., Iacobucci, G., Laurenti, G., Levi, A., Margotti, T., Massam, R., Nania, F., Palmonari, A., Pesci, A., Polini, G., Sartorelli, Y., Zamora Garcia3, A., Zichichi University, Infn, Bologna, I., 40126 Bologna, Italy f. C., Amelung, A., Bornheim, J., Crittenden, R., Deffner, M., Eckert, L., Feld, A., Frey4, M., Geerts5, M., Grothe, H., Hartmann, K., Heinloth, L., Heinz, E., Hilger, H. P., Jakob, U. F., Katz, S., Mengel6, E., Paul, M., Pfeiffer, Rembser, C. h., D., Schramm7, J., Stamm, R., Wedemeyer Physikalisches Institut der Universita¨t Bonn, D., 53115 Bonn, Germany c. S., Campbell Robson, A., Cassidy, W. N., Cottingham, N., Dyce, B., Foster, S., George, M. E., Haye, G. P., Heath, H. F., Heath, D., Piccioni, D. G., Roff, R. J., Tapper, R. Yoshida H. H., Wills Physics Laboratory, University of, Bristol, Bristol B58, 1tl, U. K. o. M., Arneodo8, R., Ayad, M., Capua, A., Garfagnini, L., Iannotti, M., Schioppa, G., Susinno Calabria University, and INFN, Physics D. e. p. t., Cosenza, Italy f. A., Caldwell9, N., Cartiglia, Z., Jing, W., Liu, J. A., Parson, S., Ritz10, F., Sciulli, P. B., Straub, L., Wai11, S., Yang12, Q., Zhu Columbia University, Nevis, Lab, Irvington on, Hudson, Ny, 10533, USA q. P., Borzemski, J., Chwastowski, A., Eskrey, Z., Jakubowski, M. B., Przybycien´, M., Zachara, of Nuclear Physics, L. Zawiejski I. n. s. t., PL 30055, Cracow, Poland j. L., Adamczyk, B., Bednarek, K., Jelen´, D., Kisielewska, T., Kowalski, M., Przybycien´, E., Rulikowska Zare¸bska, L., Suszycki, J., Zaja¸c Faculty of Physic, Nuclear, Technique, Academy of, Mining, Metallurgy, Poland j. Z., Dulin´ ski, A., Kotan´ ski Jagellonian Univ, of Physics, D. e. p. t., PL 30059, Cracow, Poland k. G., Abbiendi13, L. A. T., Bauerdick, U., Behren, H., Beier, J. K., Bienlein, G., Case, O., Deppe, K., Desler, G., Drew, M., Flasin´ ski14, D. J., Gilkinson, C., Glasman, P., Go¨ ttlicher, J., Große Knetter, T., Haa, W., Hain, D., Hasell, H., Heßling, Y., Iga, K. F., Johnson15, P., Joo, M., Kasemann, R., Klanner, W., Koch, U., Ko¨ tz, H., Kowalski, J., Lab, A., Ladage, B., Lo¨ hr, M., Lo¨ we, D., Lu¨ ke, J., Mainusch16, O., Man´ czak, J., Milewski, T., Monteiro17, J. S. T., Ng, D., Notz, K., Ohrenberg, K., Piotrzkowski, M., Roco, M., Rohde, J., Rolda´n, U., Schneekloth, W., Schulz, F., Selonke, B., Surrow, E., Tassi, T., Voß, D., Westphal, G., Wolf, U., Wollmer, C., Youngman, W., Zeuner Deutsches Elektronen Synchrotron DESY, D., 22603 Hamburg, Germany H. J., Grabosch, Mari, Stefano Maria, A., Meyer, S., Schlenstedt DESY IfH Zeuthen, D., 15738 Zeuthen, Germany G., Barbagli, E., Gallo, P., Pelfer University, Infn, Florence, Italy f. G., Maccarrone, S., De Pasquale, L., Votano INFN, Laboratori Nazionali di, Frascati, I., 00044 Frascati, Italy f. A., Bamberger, S., Eisenhardt, T., Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B., R., D. 79104 Freiburg i. B., R., Germany c. J. T., Bromley, N. H., Brook, P. J., Bussey, A. T., Doyle, D. H., Saxon, L. E., Sinclair, E., Strickland, M. L., Utley, R., Waugh, of Physics, A. S. Wilson D. e. p. t., Astronomy, University of, Glasgow, Glasgow G12, 8qq, U. K. o. A., Dannemann20, U., Holm, D., Horstmann, R., Sinkus21, K., Wick Hamburg University, Physics, I. Institute of E. x. p., D., 22761 Hamburg, Germany c. B. D., Burow22, L., Hagge16, E., Lohrmann, G., Poelz, W., Schott, F., Zetsche Hamburg University, Physics, I. I. Institute of E. x. p., Germany c. T. C., Bacon, N., Bru¨ mmer, I., Butterworth, V. L., Harri, G., Howell, B. H. Y., Hung, L., Lamberti23, K. R., Long, D. B., Miller, N., Pavel, A., Prinias24, J. K., Sedgbeer, D., Sideri, A. F., Whitfield Imperial College London, High Energy Nuclear Physics, Group, London SW7, 2bz, U. K. o. U., Mallik, M. Z., Wang, S. M., Wang, J. T., Wu University of Iowa, Physics, Astronomy, Dept, Iowa, City, Ia, 52242, USA p. P., Cloth, D., Filges Forschungszentrum Ju¨ lich, Institut fu¨ r., Kernphysik, D., 52405 Ju¨ lich, Germany S. H., An, G. H., Cho, B. J., Ko, S. B., Lee, S. W., Nam, H. S., Park, S. K., Park Korea University, Seoul 136, 701, Korea h. S., Kartik, H. J., Kim, R. R., Mcneil, W., Metcalf, V. K., Nadendla Louisiana State University, Baton, Rouge, LA 70803, 4001, USA p. F., Barreiro, J. P., Fernandez, R., Graciani, J. M., Herna´ndez, L., Herva´, L., Labarga, M., Martinez, J., del Peso, J., Puga, J., Terron, Auto´ noma Madrid, J. F. de Troco´ niz U. n. i. v. e. r., Depto de F´ısica Teo´, R´ıca, E., 28049 Madrid, Spain n. F., Corriveau, D. S., Hanna, J., Hartmann, L. W., Hung, J. N., Lim, C. G., Matthews25, W. N., Murray, A., Och, P. M., Patel, M., Riveline, D. G., Stair, M., St Laurent, R., Ullmann, G., Zacek25 McGill University, Montre´al, PQ H3A, 2t8, Canada, A, b. T., Tsurugai Meiji Gakuin University, Faculty of General, Education, Yokohama, 244, Japan V., Bashkirov, B. A., Dolgoshein, A., Stifutkin Moscow Engineering Physics Institute, RU 115 409, Moscow, Russia l. G. L., Bashindzhagyan26, P. F., Ermolov, L. K., Gladilin, Golubkov, Y. u. A., V. D., Kobrin, I. A., Korzhavina, V. A., Kuzmin, Lukina, O. Y. u., A. S., Proskuryakov, A. A., Savin, L. M., Shcheglova, A. N., Solomin, N. P., Zotov Moscow State University, Institute of Nuclear, Physic, RU 119 899, Moscow, Russia m. M., Botje, F., Chlebana, J., Engelen, M., de Kamp, P., Kooijman, A., Kruse, A., van Sighem, H., Tiecke, W., Verkerke, J., Vossebeld, M., Vreeswijk, L., Wigger, E., de Wolf, R., van Woudenberg27 NIKHEF, University of, Amsterdam, NL 1009 DB, Amsterdam, Netherlands i. D., Acosta, B., Bylsma, L. S., Durkin, J., Gilmore, C. M., Ginsburg, C. L., Kim, C., Li, T. Y., Ling, P., Nylander, I. H., Park, T. A., Romanowski28 Ohio State University, Physics, Department, Columbus, OH 43210, 1106, USA p. D. S., Bailey, R. J., Cashmore29, A. M., Cooper Sarkar, R. C. E., Devenish, N., Harnew, M., Lancaster30, L., Lindemann, J. D., Mcfall, C., Nath, V. A., Noyes24, A., Quadt, J. R., Tickner, H., Uijterwaal, R., Walczak, D. S., Water, F. F., Wilson, T., Yip Department of Physic, University of, Oxford, Oxford, U. K. o. A., Bertolin, R., Brugnera, R., Carlin, F., Dal Corso, M., De Giorgi, U., Dosselli, S., Limentani, M., Morandin, M., Posocco, L., Stanco, R., Stroili, C., Voci, F., Zuin Dipartimento di Fisica dell’ Universita, Infn, I., 35131 Padova, Italy f. J., Bulmahn, R. G., Feild31, B. Y., Oh, J. J., Whitmore Pennsylvania State University, University, Park, Pa, 16802, USA q. G., D’Agostini, G., Marini, A., Nigro Dipartimento di Fisica, ’La Sapienza’, U. n. i. v., I., 00185 Rome, Italy f. J. C., Hart, N. A., Mccubbin, T. P., Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11, 0qx, U. K. o. E., Barberi, T., Dubb, C., Heusch, M., Van Hook, W., Lockman, J. T., Rahn, H. F. W., Sadrozinski, A., Seiden, D. C., Williams University of California, Santa, Cruz, Ca, 93106, USA p. J., Biltzinger, R. J., Seifert, O., Schwarzer, A. H., Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D., 57012 Siegen, Germany c. H., Abramowicz, G., Briskin, S., Dagan32, T., Doeker32, A., Levy26 Raymond, Beverly Sackler Faculty of Exact, Science, School of, Physic, Tel Aviv, University, Tel Aviv, 69978, Israel e. J. I., Fleck33, M., Inuzuka, T., Ishii, M., Kuze, S., Mine, M., Nakao, I., Suzuki, K., Tokushuku, K., Umemori, S., Yamada, Y., Yamazaki Institute for Nuclear Study, University of, Tokyo, Tokyo, 113, Japan g. M., Chiba, R., Hamatsu, T., Hirose, K., Homma, S., Kitamura34, T., Matsushita, K., Yamauchi Tokyo Metropolitan University, Tokyo 192, 03, Japan g. R., Cirio, M., Costa, M. I., Ferrero, S., Maselli, C., Peroni, R., Sacchi, A., Solano, A., Staiano Universita di Torino, Dipartimento di Fisica, Sperimentale, I., 10129 Torino, Italy f. M., Dardo II Faculty of Science, Torino, University, Infn, Alessandria, Italy f. D. C., Bailey, F., Benard, M., Brkic, C. P., Fagerstroem, G. F., Hartner, K. K., Joo, G. M., Levman, J. F., Martin, R. S., Orr, S., Polenz, C. R., Sampson, D., Simmon, R. J., Teuscher University of Toronto, Toronto, ON M5S, 1a7, Canada a. J. M., Butterworth, C. D., Catterall, T. W., Jone, P. B., Kaziewicz, J. B., Lane, R. L., Saunder, J., Shulman, M. R., Sutton University College London, London WC1E, 6bt, U. K. o. B., Lu, L. W., Mo Virginia Polytechnic Inst, State, University, Physics, Dept, Blacksburg, Va, 24061, USA q. W., Bogusz, J., Ciborowski, J., Gajewski, G., Grzelak35, M., Kasprzak, M., Krzyz˙anowski, K., Muchorowski36, R. J., Nowak, J. M., Pawlak, T., Tymieniecka, A. K., Wro´ blewski, J. A., Zakrzewski, A. F., Z˙ arnecki Warsaw University, Institute of Experimental, Physic, PL 00681, Warsaw, Poland j. M., Adamus Institute for Nuclear Studie, Poland j. C., Coldewey, Y., Eisenberg32, D., Hochman, U., Karshon32, D., Revel32, D., Zer Zion Weizmann Institute, Nuclear Physics, Dept, Rehovot, 76100, Israel d. W. F., Badgett, J., Breitweg, D., Chapin, R., Cro, S., Dasu, C., Fouda, R. J., Lovele, S., Mattingly, D. D., Reeder, S., Silverstein, W. H., Smith, A., Vaiciuli, M., Wodarczyk University of Wisconsin, Madison, Wi, 53706, USA p. S., Bhadra, M. L., Cardy37, W. R., Frisken, M., Khakzad, W. B., Schmidke York University, North, York, Toronto ON M3J, 1p3, and Canada, A.
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: A global event shape analysis of the multihadronic final states observed in deep inelastic scattering (DIS) with a large forward rapidity gap (LRG) is performed in the range Q(2) greater than or equal to 5 GeV2, 160 GeV less than or equal to W less than or equal to 250 GeV and eta(max) less than or equal to 1.8. Particular emphasis is paid to the dependence of these variables, measured in the gamma*-pomeron rest frame, upon M-X, the mass of the hadronic final state. With increasing M-X the multihadronic final states become planar. The broadening effects exhibited by the data can be described by including a gluon density in models where the pomeron has a partonic structure or alternatively by considering a direct coupling of the pomeron to quark and gluon pairs.
Published: 1997

15. Diffractive measurements from ZEUS

Author: ZEUS Collaboration M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasin´ ski, J. Repond, R. Stanek, R. L. Ta laga, H. Zhang Argonne National Laboratory, Argonne, IL 60439, USA p. M. C. K. Mattingly Andrews University, Berrien Springs, USA F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini1, L. Cifarelli2, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, A. Polini, G. Sartorelli, Y. Zamora Garcia3, A. Zichichi University, INFN Bologna, I. 40126 Bologna, Italy f. C. Amelung, A. Bornheim, J. Crittenden, R. Deffner, M. Eckert, L. Feld, A. Frey4, M. Geerts5, M. Grothe, H. Hartmann, K. Heinloth, L. Heinz, E. Hilger, H. P. Jakob, U. F. Katz, S. Mengel6, E. Paul, M. Pfeiffer, C.h. Rembser, D. Schramm7, J. Stamm, R. Wedemeyer Physikalisches Institut der Universita¨t Bonn, D. 53115 Bonn, Germany c. S. Campbell Robson, A. Cassidy, W. N. Cottingham, N. Dyce, B. Foster, S. George, M. E. Hayes, G. P. Heath, H. F. Heath, D. Piccioni, D. G. Roff, R. J. Tapper, R. Yoshida H. H. Wills Physics Laboratory, University of Bristol, Bristol B58 1TL, U. K. o. M. Arneodo8, R. Ayad, M. Capua, A. Garfagnini, L. Iannotti, M. Schioppa, G. Susinno Calabria University, Physics D.e.p.t. and INFN, Cosenza, Italy f. A. Caldwell9, N. Cartiglia, Z. Jing, W. Liu, J. A. Parsons, S. Ritz10, F. Sciulli, P. B. Straub, L. Wai11, S. Yang12, Q. Zhu Columbia University, Nevis Labs, Irvington on Hudson, NY 10533, USA q. P. Borzemski, J. Chwastowski, A. Eskreys, Z. Jakubowski, M. B. Przybycien´, M. Zachara, L. Zawiejski I.n.s.t. of Nuclear Physics, PL 30055 Cracow, Poland j. L. Adamczyk, B. Bednarek, K. Jelen´, D. Kisielewska, T. Kowalski, M. Przybycien´, E. Rulikowska Zare¸bska, L. Suszycki, J. Zaja¸c Faculty of Physics, Nuclear Techniques, Academy of Mining, Metallurgy, Poland j. Z. Dulin´ ski, A. Kotan´ ski Jagellonian Univ, D.e.p.t. of Physics, PL 30059 Cracow, Poland k. G. Abbiendi13, L. A. T. Bauerdick, U. Behrens, H. Beier, J. K. Bienlein, G. Cases, O. Deppe, K. Desler, G. Drews, M. Flasin´ ski14, D. J. Gilkinson, C. Glasman, P. Go¨ ttlicher, J. Große Knetter, T. Haas, W. Hain, D. Hasell, H. Heßling, Y. Iga, K. F. Johnson15, P. Joos, M. Kasemann, R. Klanner, W. Koch, U. Ko¨ tz, H. Kowalski, J. Labs, A. Ladage, B. Lo¨ hr, M. Lo¨ we, D. Lu¨ ke, J. Mainusch16, O. Man´ czak, J. Milewski, T. Monteiro17, J. S. T. Ng, D. Notz, K. Ohrenberg, K. Piotrzkowski, M. Roco, M. Rohde, J. Rolda´n, U. Schneekloth, W. Schulz, F. Selonke, B. Surrow, E. Tassi, T. Voß, D. Westphal, G. Wolf, U. Wollmer, C. Youngman, W. Zeuner Deutsches Elektronen Synchrotron DESY, D. 22603 Hamburg, Germany H. J. Grabosch, A. Meyer, S. Schlenstedt DESY IfH Zeuthen, D. 15738 Zeuthen, Germany G. Barbagli, E. Gallo, P. Pelfer University, INFN, Florence, Italy f. G. Maccarrone, S. De Pasquale, L. Votano INFN, Laboratori Nazionali di Frascati, I. 00044 Frascati, Italy f. A. Bamberger, S. Eisenhardt, T. Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B.r., D. 79104 Freiburg i. B.r., Germany c. J. T. Bromley, N. H. Brook, P. J. Bussey, A. T. Doyle, D. H. Saxon, L. E. Sinclair, E. Strickland, M. L. Utley, R. Waugh, A. S. Wilson D.e.p.t. of Physics, Astronomy, University of Glasgow, Glasgow G12 8QQ, U. K. o. A. Dannemann20, U. Holm, D. Horstmann, R. Sinkus21, K. Wick Hamburg University, I. Institute of E.x.p. Physics, D. 22761 Hamburg, Germany c. B. D. Burow22, L. Hagge16, E. Lohrmann, G. Poelz, W. Schott, F. Zetsche Hamburg University, I.I. Institute of E.x.p. Physics, Germany c. T. C. Bacon, N. Bru¨ mmer, I. Butterworth, V. L. Harris, G. Howell, B. H. Y. Hung, L. Lamberti23, K. R. Long, D. B. Miller, N. Pavel, A. Prinias24, J. K. Sedgbeer, D. Sideris, A. F. Whitfield Imperial College London, High Energy Nuclear Physics Group, London SW7 2BZ, U. K. o. U. Mallik, M. Z. Wang, S. M. Wang, J. T. Wu University of Iowa, Physics, Astronomy Dept, Iowa City, IA 52242, USA p. P. Cloth, D. Filges Forschungszentrum Ju¨ lich, Institut fu¨ r. Kernphysik, D. 52405 Ju¨ lich, Germany S. H. An, G. H. Cho, B. J. Ko, S. B. Lee, S. W. Nam, H. S. Park, S. K. Park Korea University, Seoul 136 701, Korea h. S. Kartik, H. J. Kim, R. R. McNeil, W. Metcalf, V. K. Nadendla Louisiana State University, Baton Rouge, LA 70803 4001, USA p. F. Barreiro, J. P. Fernandez, R. Graciani, J. M. Herna´ndez, L. Herva´s, L. Labarga, M. Martinez, J. del Peso, J. Puga, J. Terron, J. F. de Troco´ niz U.n.i.v.e.r. Auto´ noma Madrid, Depto de F´ısica Teo´ r´ıca, E. 28049 Madrid, Spain n. F. Corriveau, D. S. Hanna, J. Hartmann, L. W. Hung, J. N. Lim, C. G. Matthews25, W. N. Murray, A. Ochs, P. M. Patel, M. Riveline, D. G. Stairs, M. St Laurent, R. Ullmann, G. Zacek25 McGill University, Montre´al, PQ H3A 2T8, Canada a, b. T. Tsurugai Meiji Gakuin University, Faculty of General Education, Yokohama 244, Japan V. Bashkirov, B. A. Dolgoshein, A. Stifutkin Moscow Engineering Physics Institute, RU 115 409 Moscow, Russia l. G. L. Bashindzhagyan26, P. F. Ermolov, L. K. Gladilin, Y.u. A. Golubkov, V. D. Kobrin, I. A. Korzhavina, V. A. Kuzmin, O. Y.u. Lukina, A. S. Proskuryakov, A. A. Savin, L. M. Shcheglova, A. N. Solomin, N. P. Zotov Moscow State University, Institute of Nuclear Physics, RU 119 899 Moscow, Russia m. M. Botje, F. Chlebana, J. Engelen, M. de Kamps, P. Kooijman, A. Kruse, A. van Sighem, H. Tiecke, W. Verkerke, J. Vossebeld, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg27 NIKHEF, University of Amsterdam, NL 1009 DB Amsterdam, Netherlands i. D. Acosta, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, C. Li, T. Y. Ling, P. Nylander, I. H. Park, T. A. Romanowski28 Ohio State University, Physics Department, Columbus, OH 43210 1106, USA p. D. S. Bailey, R. J. Cashmore29, A. M. Cooper Sarkar, R. C. E. Devenish, N. Harnew, M. Lancaster30, L. Lindemann, J. D. McFall, C. Nath, V. A. Noyes24, A. Quadt, J. R. Tickner, H. Uijterwaal, R. Walczak, D. S. Waters, F. F. Wilson, T. Yip Department of Physics, University of Oxford, Oxford, U. K. o. A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, F. Zuin Dipartimento di Fisica dell’ Universita, INFN, I. 35131 Padova, Italy f. J. Bulmahn, R. G. Feild31, B. Y. Oh, J. J. Whitmore Pennsylvania State University, University Park, PA 16802, USA q. G. D’Agostini, G. Marini, A. Nigro Dipartimento di Fisica, U.n.i.v. ’La Sapienza’, I. 00185 Rome, Italy f. J. C. Hart, N. A. McCubbin, T. P. Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U. K. o. E. Barberis, T. Dubbs, C. Heusch, M. Van Hook, W. Lockman, J. T. Rahn, H. F. W. Sadrozinski, A. Seiden, D. C. Williams University of California, Santa Cruz, CA 93106, USA p. J. Biltzinger, R. J. Seifert, O. Schwarzer, A. H. Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D. 57012 Siegen, Germany c. H. Abramowicz, G. Briskin, S. Dagan32, T. Doeker32, A. Levy26 Raymond, Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv 69978, Israel e. J. I. Fleck33, M. Inuzuka, T. Ishii, M. Kuze, S. Mine, M. Nakao, I. Suzuki, K. Tokushuku, K. Umemori, S. Yamada, Y. Yamazaki Institute for Nuclear Study, University of Tokyo, Tokyo 113, Japan g. M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura34, T. Matsushita, K. Yamauchi Tokyo Metropolitan University, Tokyo 192 03, Japan g. R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano Universita di Torino, Dipartimento di Fisica Sperimentale, I. 10129 Torino, Italy f. M. Dardo II Faculty of Sciences, Torino University, INFN Alessandria, Italy f. D. C. Bailey, F. Benard, M. Brkic, C. P. Fagerstroem, G. F. Hartner, K. K. Joo, G. M. Levman, J. F. Martin, R. S. Orr, S. Polenz, C. R. Sampson, D. Simmons, R. J. Teuscher University of Toronto, Toronto, ON M5S 1A7, Canada a. J. M. Butterworth, C. D. Catterall, T. W. Jones, P. B. Kaziewicz, J. B. Lane, R. L. Saunders, J. Shulman, M. R. Sutton University College London, London WC1E 6BT, U. K. o. B. Lu, L. W. Mo Virginia Polytechnic Inst, State University, Physics Dept, Blacksburg, VA 24061, USA q. W. Bogusz, J. Ciborowski, J. Gajewski, G. Grzelak35, M. Kasprzak, M. Krzyz˙anowski, K. Muchorowski36, R. J. Nowak, J. M. Pawlak, T. Tymieniecka, A. K. Wro´ blewski, J. A. Zakrzewski, A. F. Z˙ arnecki Warsaw University, Institute of Experimental Physics, PL 00681 Warsaw, Poland j. M. Adamus Institute for Nuclear Studies, Poland j. C. Coldewey, Y. Eisenberg32, D. Hochman, U. Karshon32, D. Revel32, D. Zer Zion Weizmann Institute, Nuclear Physics Dept, Rehovot 76100, Israel d. W. F. Badgett, J. Breitweg, D. Chapin, R. Cross, S. Dasu, C. Foudas, R. J. Loveless, S. Mattingly, D. D. Reeder, S. Silverstein, W. H. Smith, A. Vaiciulis, M. Wodarczyk University of Wisconsin, Madison, WI 53706, USA p. S. Bhadra, M. L. Cardy37, W. R. Frisken, M. Khakzad, W. B. Schmidke York University, North York, Toronto ON M3J 1P3, Canada a., MARI, Stefano Maria, ZEUS Collaboration M., Derrick, D., Krakauer, S., Magill, D., Mikuna, B., Musgrave, J. R., Okrasin´ ski, J., Repond, R., Stanek, R. L., Ta laga, H., Zhang Argonne National Laboratory, Argonne, Il, 60439, USA p. M. C. K., Mattingly Andrews University, Berrien, Spring, Mi, USA F., Anselmo, P., Antonioli, G., Bari, M., Basile, L., Bellagamba, D., Boscherini, A., Bruni, G., Bruni, P., Bruni, G., Cara Romeo, G., Castellini1, L., Cifarelli2, F., Cindolo, A., Contin, M., Corradi, I., Giala, P., Giusti, G., Iacobucci, G., Laurenti, G., Levi, A., Margotti, T., Massam, R., Nania, F., Palmonari, A., Pesci, A., Polini, G., Sartorelli, Y., Zamora Garcia3, A., Zichichi University, Infn, Bologna, I., 40126 Bologna, Italy f. C., Amelung, A., Bornheim, J., Crittenden, R., Deffner, M., Eckert, L., Feld, A., Frey4, M., Geerts5, M., Grothe, H., Hartmann, K., Heinloth, L., Heinz, E., Hilger, H. P., Jakob, U. F., Katz, S., Mengel6, E., Paul, M., Pfeiffer, Rembser, C. h., D., Schramm7, J., Stamm, R., Wedemeyer Physikalisches Institut der Universita¨t Bonn, D., 53115 Bonn, Germany c. S., Campbell Robson, A., Cassidy, W. N., Cottingham, N., Dyce, B., Foster, S., George, M. E., Haye, G. P., Heath, H. F., Heath, D., Piccioni, D. G., Roff, R. J., Tapper, R. Yoshida H. H., Wills Physics Laboratory, University of, Bristol, Bristol B58, 1tl, U. K. o. M., Arneodo8, R., Ayad, M., Capua, A., Garfagnini, L., Iannotti, M., Schioppa, G., Susinno Calabria University, and INFN, Physics D. e. p. t., Cosenza, Italy f. A., Caldwell9, N., Cartiglia, Z., Jing, W., Liu, J. A., Parson, S., Ritz10, F., Sciulli, P. B., Straub, L., Wai11, S., Yang12, Q., Zhu Columbia University, Nevis, Lab, Irvington on, Hudson, Ny, 10533, USA q. P., Borzemski, J., Chwastowski, A., Eskrey, Z., Jakubowski, M. B., Przybycien´, M., Zachara, of Nuclear Physics, L. Zawiejski I. n. s. t., PL 30055, Cracow, Poland j. L., Adamczyk, B., Bednarek, K., Jelen´, D., Kisielewska, T., Kowalski, M., Przybycien´, E., Rulikowska Zare¸bska, L., Suszycki, J., Zaja¸c Faculty of Physic, Nuclear, Technique, Academy of, Mining, Metallurgy, Poland j. Z., Dulin´ ski, A., Kotan´ ski Jagellonian Univ, of Physics, D. e. p. t., PL 30059, Cracow, Poland k. G., Abbiendi13, L. A. T., Bauerdick, U., Behren, H., Beier, J. K., Bienlein, G., Case, O., Deppe, K., Desler, G., Drew, M., Flasin´ ski14, D. J., Gilkinson, C., Glasman, P., Go¨ ttlicher, J., Große Knetter, T., Haa, W., Hain, D., Hasell, H., Heßling, Y., Iga, K. F., Johnson15, P., Joo, M., Kasemann, R., Klanner, W., Koch, U., Ko¨ tz, H., Kowalski, J., Lab, A., Ladage, B., Lo¨ hr, M., Lo¨ we, D., Lu¨ ke, J., Mainusch16, O., Man´ czak, J., Milewski, T., Monteiro17, J. S. T., Ng, D., Notz, K., Ohrenberg, K., Piotrzkowski, M., Roco, M., Rohde, J., Rolda´n, U., Schneekloth, W., Schulz, F., Selonke, B., Surrow, E., Tassi, T., Voß, D., Westphal, G., Wolf, U., Wollmer, C., Youngman, W., Zeuner Deutsches Elektronen Synchrotron DESY, D., 22603 Hamburg, Germany H. J., Grabosch, Mari, Stefano Maria, A., Meyer, S., Schlenstedt DESY IfH Zeuthen, D., 15738 Zeuthen, Germany G., Barbagli, E., Gallo, P., Pelfer University, Infn, Florence, Italy f. G., Maccarrone, S., De Pasquale, L., Votano INFN, Laboratori Nazionali di, Frascati, I., 00044 Frascati, Italy f. A., Bamberger, S., Eisenhardt, T., Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B., R., D. 79104 Freiburg i. B., R., Germany c. J. T., Bromley, N. H., Brook, P. J., Bussey, A. T., Doyle, D. H., Saxon, L. E., Sinclair, E., Strickland, M. L., Utley, R., Waugh, of Physics, A. S. Wilson D. e. p. t., Astronomy, University of, Glasgow, Glasgow G12, 8qq, U. K. o. A., Dannemann20, U., Holm, D., Horstmann, R., Sinkus21, K., Wick Hamburg University, Physics, I. Institute of E. x. p., D., 22761 Hamburg, Germany c. B. D., Burow22, L., Hagge16, E., Lohrmann, G., Poelz, W., Schott, F., Zetsche Hamburg University, Physics, I. I. Institute of E. x. p., Germany c. T. C., Bacon, N., Bru¨ mmer, I., Butterworth, V. L., Harri, G., Howell, B. H. Y., Hung, L., Lamberti23, K. R., Long, D. B., Miller, N., Pavel, A., Prinias24, J. K., Sedgbeer, D., Sideri, A. F., Whitfield Imperial College London, High Energy Nuclear Physics, Group, London SW7, 2bz, U. K. o. U., Mallik, M. Z., Wang, S. M., Wang, J. T., Wu University of Iowa, Physics, Astronomy, Dept, Iowa, City, Ia, 52242, USA p. P., Cloth, D., Filges Forschungszentrum Ju¨ lich, Institut fu¨ r., Kernphysik, D., 52405 Ju¨ lich, Germany S. H., An, G. H., Cho, B. J., Ko, S. B., Lee, S. W., Nam, H. S., Park, S. K., Park Korea University, Seoul 136, 701, Korea h. S., Kartik, H. J., Kim, R. R., Mcneil, W., Metcalf, V. K., Nadendla Louisiana State University, Baton, Rouge, LA 70803, 4001, USA p. F., Barreiro, J. P., Fernandez, R., Graciani, J. M., Herna´ndez, L., Herva´, L., Labarga, M., Martinez, J., del Peso, J., Puga, J., Terron, Auto´ noma Madrid, J. F. de Troco´ niz U. n. i. v. e. r., Depto de F´ısica Teo´, R´ıca, E., 28049 Madrid, Spain n. F., Corriveau, D. S., Hanna, J., Hartmann, L. W., Hung, J. N., Lim, C. G., Matthews25, W. N., Murray, A., Och, P. M., Patel, M., Riveline, D. G., Stair, M., St Laurent, R., Ullmann, G., Zacek25 McGill University, Montre´al, PQ H3A, 2t8, Canada, A, b. T., Tsurugai Meiji Gakuin University, Faculty of General, Education, Yokohama, 244, Japan V., Bashkirov, B. A., Dolgoshein, A., Stifutkin Moscow Engineering Physics Institute, RU 115 409, Moscow, Russia l. G. L., Bashindzhagyan26, P. F., Ermolov, L. K., Gladilin, Golubkov, Y. u. A., V. D., Kobrin, I. A., Korzhavina, V. A., Kuzmin, Lukina, O. Y. u., A. S., Proskuryakov, A. A., Savin, L. M., Shcheglova, A. N., Solomin, N. P., Zotov Moscow State University, Institute of Nuclear, Physic, RU 119 899, Moscow, Russia m. M., Botje, F., Chlebana, J., Engelen, M., de Kamp, P., Kooijman, A., Kruse, A., van Sighem, H., Tiecke, W., Verkerke, J., Vossebeld, M., Vreeswijk, L., Wigger, E., de Wolf, R., van Woudenberg27 NIKHEF, University of, Amsterdam, NL 1009 DB, Amsterdam, Netherlands i. D., Acosta, B., Bylsma, L. S., Durkin, J., Gilmore, C. M., Ginsburg, C. L., Kim, C., Li, T. Y., Ling, P., Nylander, I. H., Park, T. A., Romanowski28 Ohio State University, Physics, Department, Columbus, OH 43210, 1106, USA p. D. S., Bailey, R. J., Cashmore29, A. M., Cooper Sarkar, R. C. E., Devenish, N., Harnew, M., Lancaster30, L., Lindemann, J. D., Mcfall, C., Nath, V. A., Noyes24, A., Quadt, J. R., Tickner, H., Uijterwaal, R., Walczak, D. S., Water, F. F., Wilson, T., Yip Department of Physic, University of, Oxford, Oxford, U. K. o. A., Bertolin, R., Brugnera, R., Carlin, F., Dal Corso, M., De Giorgi, U., Dosselli, S., Limentani, M., Morandin, M., Posocco, L., Stanco, R., Stroili, C., Voci, F., Zuin Dipartimento di Fisica dell’ Universita, Infn, I., 35131 Padova, Italy f. J., Bulmahn, R. G., Feild31, B. Y., Oh, J. J., Whitmore Pennsylvania State University, University, Park, Pa, 16802, USA q. G., D’Agostini, G., Marini, A., Nigro Dipartimento di Fisica, ’La Sapienza’, U. n. i. v., I., 00185 Rome, Italy f. J. C., Hart, N. A., Mccubbin, T. P., Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11, 0qx, U. K. o. E., Barberi, T., Dubb, C., Heusch, M., Van Hook, W., Lockman, J. T., Rahn, H. F. W., Sadrozinski, A., Seiden, D. C., Williams University of California, Santa, Cruz, Ca, 93106, USA p. J., Biltzinger, R. J., Seifert, O., Schwarzer, A. H., Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D., 57012 Siegen, Germany c. H., Abramowicz, G., Briskin, S., Dagan32, T., Doeker32, A., Levy26 Raymond, Beverly Sackler Faculty of Exact, Science, School of, Physic, Tel Aviv, University, Tel Aviv, 69978, Israel e. J. I., Fleck33, M., Inuzuka, T., Ishii, M., Kuze, S., Mine, M., Nakao, I., Suzuki, K., Tokushuku, K., Umemori, S., Yamada, Y., Yamazaki Institute for Nuclear Study, University of, Tokyo, Tokyo, 113, Japan g. M., Chiba, R., Hamatsu, T., Hirose, K., Homma, S., Kitamura34, T., Matsushita, K., Yamauchi Tokyo Metropolitan University, Tokyo 192, 03, Japan g. R., Cirio, M., Costa, M. I., Ferrero, S., Maselli, C., Peroni, R., Sacchi, A., Solano, A., Staiano Universita di Torino, Dipartimento di Fisica, Sperimentale, I., 10129 Torino, Italy f. M., Dardo II Faculty of Science, Torino, University, Infn, Alessandria, Italy f. D. C., Bailey, F., Benard, M., Brkic, C. P., Fagerstroem, G. F., Hartner, K. K., Joo, G. M., Levman, J. F., Martin, R. S., Orr, S., Polenz, C. R., Sampson, D., Simmon, R. J., Teuscher University of Toronto, Toronto, ON M5S, 1a7, Canada a. J. M., Butterworth, C. D., Catterall, T. W., Jone, P. B., Kaziewicz, J. B., Lane, R. L., Saunder, J., Shulman, M. R., Sutton University College London, London WC1E, 6bt, U. K. o. B., Lu, L. W., Mo Virginia Polytechnic Inst, State, University, Physics, Dept, Blacksburg, Va, 24061, USA q. W., Bogusz, J., Ciborowski, J., Gajewski, G., Grzelak35, M., Kasprzak, M., Krzyz˙anowski, K., Muchorowski36, R. J., Nowak, J. M., Pawlak, T., Tymieniecka, A. K., Wro´ blewski, J. A., Zakrzewski, A. F., Z˙ arnecki Warsaw University, Institute of Experimental, Physic, PL 00681, Warsaw, Poland j. M., Adamus Institute for Nuclear Studie, Poland j. C., Coldewey, Y., Eisenberg32, D., Hochman, U., Karshon32, D., Revel32, D., Zer Zion Weizmann Institute, Nuclear Physics, Dept, Rehovot, 76100, Israel d. W. F., Badgett, J., Breitweg, D., Chapin, R., Cro, S., Dasu, C., Fouda, R. J., Lovele, S., Mattingly, D. D., Reeder, S., Silverstein, W. H., Smith, A., Vaiciuli, M., Wodarczyk University of Wisconsin, Madison, Wi, 53706, USA p. S., Bhadra, M. L., Cardy37, W. R., Frisken, M., Khakzad, W. B., Schmidke York University, North, York, Toronto ON M3J, 1p3, and Canada, A.
Subjects: High Energy Physics::Phenomenology, Physics::Optics, High Energy Physics::Experiment, Computer Science::Cryptography and Security
Abstract: Recent results on diffraction from the ZEUS Collaboration at HERA are presented. Properties of the diffractive photon dissociation in photoproduction and deep inelastic scattering were studied and the intercept of the pomeron, alpha(IP)(0), was inferred.
Published: 1997

16. Diffractive production of charm and jets at HERA

Author: ZEUS Collaboration M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasin´ ski, J. Repond, R. Stanek, R. L. Ta laga, H. Zhang Argonne National Laboratory, Argonne, IL 60439, USA p. M. C. K. Mattingly Andrews University, Berrien Springs, USA F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini1, L. Cifarelli2, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, A. Polini, G. Sartorelli, Y. Zamora Garcia3, A. Zichichi University, INFN Bologna, I. 40126 Bologna, Italy f. C. Amelung, A. Bornheim, J. Crittenden, R. Deffner, M. Eckert, L. Feld, A. Frey4, M. Geerts5, M. Grothe, H. Hartmann, K. Heinloth, L. Heinz, E. Hilger, H. P. Jakob, U. F. Katz, S. Mengel6, E. Paul, M. Pfeiffer, C.h. Rembser, D. Schramm7, J. Stamm, R. Wedemeyer Physikalisches Institut der Universita¨t Bonn, D. 53115 Bonn, Germany c. S. Campbell Robson, A. Cassidy, W. N. Cottingham, N. Dyce, B. Foster, S. George, M. E. Hayes, G. P. Heath, H. F. Heath, D. Piccioni, D. G. Roff, R. J. Tapper, R. Yoshida H. H. Wills Physics Laboratory, University of Bristol, Bristol B58 1TL, U. K. o. M. Arneodo8, R. Ayad, M. Capua, A. Garfagnini, L. Iannotti, M. Schioppa, G. Susinno Calabria University, Physics D.e.p.t. and INFN, Cosenza, Italy f. A. Caldwell9, N. Cartiglia, Z. Jing, W. Liu, J. A. Parsons, S. Ritz10, F. Sciulli, P. B. Straub, L. Wai11, S. Yang12, Q. Zhu Columbia University, Nevis Labs, Irvington on Hudson, NY 10533, USA q. P. Borzemski, J. Chwastowski, A. Eskreys, Z. Jakubowski, M. B. Przybycien´, M. Zachara, L. Zawiejski I.n.s.t. of Nuclear Physics, PL 30055 Cracow, Poland j. L. Adamczyk, B. Bednarek, K. Jelen´, D. Kisielewska, T. Kowalski, M. Przybycien´, E. Rulikowska Zare¸bska, L. Suszycki, J. Zaja¸c Faculty of Physics, Nuclear Techniques, Academy of Mining, Metallurgy, Poland j. Z. Dulin´ ski, A. Kotan´ ski Jagellonian Univ, D.e.p.t. of Physics, PL 30059 Cracow, Poland k. G. Abbiendi13, L. A. T. Bauerdick, U. Behrens, H. Beier, J. K. Bienlein, G. Cases, O. Deppe, K. Desler, G. Drews, M. Flasin´ ski14, D. J. Gilkinson, C. Glasman, P. Go¨ ttlicher, J. Große Knetter, T. Haas, W. Hain, D. Hasell, H. Heßling, Y. Iga, K. F. Johnson15, P. Joos, M. Kasemann, R. Klanner, W. Koch, U. Ko¨ tz, H. Kowalski, J. Labs, A. Ladage, B. Lo¨ hr, M. Lo¨ we, D. Lu¨ ke, J. Mainusch16, O. Man´ czak, J. Milewski, T. Monteiro17, J. S. T. Ng, D. Notz, K. Ohrenberg, K. Piotrzkowski, M. Roco, M. Rohde, J. Rolda´n, U. Schneekloth, W. Schulz, F. Selonke, B. Surrow, E. Tassi, T. Voß, D. Westphal, G. Wolf, U. Wollmer, C. Youngman, W. Zeuner Deutsches Elektronen Synchrotron DESY, D. 22603 Hamburg, Germany H. J. Grabosch, A. Meyer, S. Schlenstedt DESY IfH Zeuthen, D. 15738 Zeuthen, Germany G. Barbagli, E. Gallo, P. Pelfer University, INFN, Florence, Italy f. G. Maccarrone, S. De Pasquale, L. Votano INFN, Laboratori Nazionali di Frascati, I. 00044 Frascati, Italy f. A. Bamberger, S. Eisenhardt, T. Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B.r., D. 79104 Freiburg i. B.r., Germany c. J. T. Bromley, N. H. Brook, P. J. Bussey, A. T. Doyle, D. H. Saxon, L. E. Sinclair, E. Strickland, M. L. Utley, R. Waugh, A. S. Wilson D.e.p.t. of Physics, Astronomy, University of Glasgow, Glasgow G12 8QQ, U. K. o. A. Dannemann20, U. Holm, D. Horstmann, R. Sinkus21, K. Wick Hamburg University, I. Institute of E.x.p. Physics, D. 22761 Hamburg, Germany c. B. D. Burow22, L. Hagge16, E. Lohrmann, G. Poelz, W. Schott, F. Zetsche Hamburg University, I.I. Institute of E.x.p. Physics, Germany c. T. C. Bacon, N. Bru¨ mmer, I. Butterworth, V. L. Harris, G. Howell, B. H. Y. Hung, L. Lamberti23, K. R. Long, D. B. Miller, N. Pavel, A. Prinias24, J. K. Sedgbeer, D. Sideris, A. F. Whitfield Imperial College London, High Energy Nuclear Physics Group, London SW7 2BZ, U. K. o. U. Mallik, M. Z. Wang, S. M. Wang, J. T. Wu University of Iowa, Physics, Astronomy Dept, Iowa City, IA 52242, USA p. P. Cloth, D. Filges Forschungszentrum Ju¨ lich, Institut fu¨ r. Kernphysik, D. 52405 Ju¨ lich, Germany S. H. An, G. H. Cho, B. J. Ko, S. B. Lee, S. W. Nam, H. S. Park, S. K. Park Korea University, Seoul 136 701, Korea h. S. Kartik, H. J. Kim, R. R. McNeil, W. Metcalf, V. K. Nadendla Louisiana State University, Baton Rouge, LA 70803 4001, USA p. F. Barreiro, J. P. Fernandez, R. Graciani, J. M. Herna´ndez, L. Herva´s, L. Labarga, M. Martinez, J. del Peso, J. Puga, J. Terron, J. F. de Troco´ niz U.n.i.v.e.r. Auto´ noma Madrid, Depto de F´ısica Teo´ r´ıca, E. 28049 Madrid, Spain n. F. Corriveau, D. S. Hanna, J. Hartmann, L. W. Hung, J. N. Lim, C. G. Matthews25, W. N. Murray, A. Ochs, P. M. Patel, M. Riveline, D. G. Stairs, M. St Laurent, R. Ullmann, G. Zacek25 McGill University, Montre´al, PQ H3A 2T8, Canada a, b. T. Tsurugai Meiji Gakuin University, Faculty of General Education, Yokohama 244, Japan V. Bashkirov, B. A. Dolgoshein, A. Stifutkin Moscow Engineering Physics Institute, RU 115 409 Moscow, Russia l. G. L. Bashindzhagyan26, P. F. Ermolov, L. K. Gladilin, Y.u. A. Golubkov, V. D. Kobrin, I. A. Korzhavina, V. A. Kuzmin, O. Y.u. Lukina, A. S. Proskuryakov, A. A. Savin, L. M. Shcheglova, A. N. Solomin, N. P. Zotov Moscow State University, Institute of Nuclear Physics, RU 119 899 Moscow, Russia m. M. Botje, F. Chlebana, J. Engelen, M. de Kamps, P. Kooijman, A. Kruse, A. van Sighem, H. Tiecke, W. Verkerke, J. Vossebeld, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg27 NIKHEF, University of Amsterdam, NL 1009 DB Amsterdam, Netherlands i. D. Acosta, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, C. Li, T. Y. Ling, P. Nylander, I. H. Park, T. A. Romanowski28 Ohio State University, Physics Department, Columbus, OH 43210 1106, USA p. D. S. Bailey, R. J. Cashmore29, A. M. Cooper Sarkar, R. C. E. Devenish, N. Harnew, M. Lancaster30, L. Lindemann, J. D. McFall, C. Nath, V. A. Noyes24, A. Quadt, J. R. Tickner, H. Uijterwaal, R. Walczak, D. S. Waters, F. F. Wilson, T. Yip Department of Physics, University of Oxford, Oxford, U. K. o. A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, F. Zuin Dipartimento di Fisica dell’ Universita, INFN, I. 35131 Padova, Italy f. J. Bulmahn, R. G. Feild31, B. Y. Oh, J. J. Whitmore Pennsylvania State University, University Park, PA 16802, USA q. G. D’Agostini, G. Marini, A. Nigro Dipartimento di Fisica, U.n.i.v. ’La Sapienza’, I. 00185 Rome, Italy f. J. C. Hart, N. A. McCubbin, T. P. Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U. K. o. E. Barberis, T. Dubbs, C. Heusch, M. Van Hook, W. Lockman, J. T. Rahn, H. F. W. Sadrozinski, A. Seiden, D. C. Williams University of California, Santa Cruz, CA 93106, USA p. J. Biltzinger, R. J. Seifert, O. Schwarzer, A. H. Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D. 57012 Siegen, Germany c. H. Abramowicz, G. Briskin, S. Dagan32, T. Doeker32, A. Levy26 Raymond, Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv 69978, Israel e. J. I. Fleck33, M. Inuzuka, T. Ishii, M. Kuze, S. Mine, M. Nakao, I. Suzuki, K. Tokushuku, K. Umemori, S. Yamada, Y. Yamazaki Institute for Nuclear Study, University of Tokyo, Tokyo 113, Japan g. M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura34, T. Matsushita, K. Yamauchi Tokyo Metropolitan University, Tokyo 192 03, Japan g. R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano Universita di Torino, Dipartimento di Fisica Sperimentale, I. 10129 Torino, Italy f. M. Dardo II Faculty of Sciences, Torino University, INFN Alessandria, Italy f. D. C. Bailey, F. Benard, M. Brkic, C. P. Fagerstroem, G. F. Hartner, K. K. Joo, G. M. Levman, J. F. Martin, R. S. Orr, S. Polenz, C. R. Sampson, D. Simmons, R. J. Teuscher University of Toronto, Toronto, ON M5S 1A7, Canada a. J. M. Butterworth, C. D. Catterall, T. W. Jones, P. B. Kaziewicz, J. B. Lane, R. L. Saunders, J. Shulman, M. R. Sutton University College London, London WC1E 6BT, U. K. o. B. Lu, L. W. Mo Virginia Polytechnic Inst, State University, Physics Dept, Blacksburg, VA 24061, USA q. W. Bogusz, J. Ciborowski, J. Gajewski, G. Grzelak35, M. Kasprzak, M. Krzyz˙anowski, K. Muchorowski36, R. J. Nowak, J. M. Pawlak, T. Tymieniecka, A. K. Wro´ blewski, J. A. Zakrzewski, A. F. Z˙ arnecki Warsaw University, Institute of Experimental Physics, PL 00681 Warsaw, Poland j. M. Adamus Institute for Nuclear Studies, Poland j. C. Coldewey, Y. Eisenberg32, D. Hochman, U. Karshon32, D. Revel32, D. Zer Zion Weizmann Institute, Nuclear Physics Dept, Rehovot 76100, Israel d. W. F. Badgett, J. Breitweg, D. Chapin, R. Cross, S. Dasu, C. Foudas, R. J. Loveless, S. Mattingly, D. D. Reeder, S. Silverstein, W. H. Smith, A. Vaiciulis, M. Wodarczyk University of Wisconsin, Madison, WI 53706, USA p. S. Bhadra, M. L. Cardy37, W. R. Frisken, M. Khakzad, W. B. Schmidke York University, North York, Toronto ON M3J 1P3, Canada a., MARI, Stefano Maria, ZEUS Collaboration M., Derrick, D., Krakauer, S., Magill, D., Mikuna, B., Musgrave, J. R., Okrasin´ ski, J., Repond, R., Stanek, R. L., Ta laga, H., Zhang Argonne National Laboratory, Argonne, Il, 60439, USA p. M. C. K., Mattingly Andrews University, Berrien, Spring, Mi, USA F., Anselmo, P., Antonioli, G., Bari, M., Basile, L., Bellagamba, D., Boscherini, A., Bruni, G., Bruni, P., Bruni, G., Cara Romeo, G., Castellini1, L., Cifarelli2, F., Cindolo, A., Contin, M., Corradi, I., Giala, P., Giusti, G., Iacobucci, G., Laurenti, G., Levi, A., Margotti, T., Massam, R., Nania, F., Palmonari, A., Pesci, A., Polini, G., Sartorelli, Y., Zamora Garcia3, A., Zichichi University, Infn, Bologna, I., 40126 Bologna, Italy f. C., Amelung, A., Bornheim, J., Crittenden, R., Deffner, M., Eckert, L., Feld, A., Frey4, M., Geerts5, M., Grothe, H., Hartmann, K., Heinloth, L., Heinz, E., Hilger, H. P., Jakob, U. F., Katz, S., Mengel6, E., Paul, M., Pfeiffer, Rembser, C. h., D., Schramm7, J., Stamm, R., Wedemeyer Physikalisches Institut der Universita¨t Bonn, D., 53115 Bonn, Germany c. S., Campbell Robson, A., Cassidy, W. N., Cottingham, N., Dyce, B., Foster, S., George, M. E., Haye, G. P., Heath, H. F., Heath, D., Piccioni, D. G., Roff, R. J., Tapper, R. Yoshida H. H., Wills Physics Laboratory, University of, Bristol, Bristol B58, 1tl, U. K. o. M., Arneodo8, R., Ayad, M., Capua, A., Garfagnini, L., Iannotti, M., Schioppa, G., Susinno Calabria University, and INFN, Physics D. e. p. t., Cosenza, Italy f. A., Caldwell9, N., Cartiglia, Z., Jing, W., Liu, J. A., Parson, S., Ritz10, F., Sciulli, P. B., Straub, L., Wai11, S., Yang12, Q., Zhu Columbia University, Nevis, Lab, Irvington on, Hudson, Ny, 10533, USA q. P., Borzemski, J., Chwastowski, A., Eskrey, Z., Jakubowski, M. B., Przybycien´, M., Zachara, of Nuclear Physics, L. Zawiejski I. n. s. t., PL 30055, Cracow, Poland j. L., Adamczyk, B., Bednarek, K., Jelen´, D., Kisielewska, T., Kowalski, M., Przybycien´, E., Rulikowska Zare¸bska, L., Suszycki, J., Zaja¸c Faculty of Physic, Nuclear, Technique, Academy of, Mining, Metallurgy, Poland j. Z., Dulin´ ski, A., Kotan´ ski Jagellonian Univ, of Physics, D. e. p. t., PL 30059, Cracow, Poland k. G., Abbiendi13, L. A. T., Bauerdick, U., Behren, H., Beier, J. K., Bienlein, G., Case, O., Deppe, K., Desler, G., Drew, M., Flasin´ ski14, D. J., Gilkinson, C., Glasman, P., Go¨ ttlicher, J., Große Knetter, T., Haa, W., Hain, D., Hasell, H., Heßling, Y., Iga, K. F., Johnson15, P., Joo, M., Kasemann, R., Klanner, W., Koch, U., Ko¨ tz, H., Kowalski, J., Lab, A., Ladage, B., Lo¨ hr, M., Lo¨ we, D., Lu¨ ke, J., Mainusch16, O., Man´ czak, J., Milewski, T., Monteiro17, J. S. T., Ng, D., Notz, K., Ohrenberg, K., Piotrzkowski, M., Roco, M., Rohde, J., Rolda´n, U., Schneekloth, W., Schulz, F., Selonke, B., Surrow, E., Tassi, T., Voß, D., Westphal, G., Wolf, U., Wollmer, C., Youngman, W., Zeuner Deutsches Elektronen Synchrotron DESY, D., 22603 Hamburg, Germany H. J., Grabosch, Mari, Stefano Maria, A., Meyer, S., Schlenstedt DESY IfH Zeuthen, D., 15738 Zeuthen, Germany G., Barbagli, E., Gallo, P., Pelfer University, Infn, Florence, Italy f. G., Maccarrone, S., De Pasquale, L., Votano INFN, Laboratori Nazionali di, Frascati, I., 00044 Frascati, Italy f. A., Bamberger, S., Eisenhardt, T., Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B., R., D. 79104 Freiburg i. B., R., Germany c. J. T., Bromley, N. H., Brook, P. J., Bussey, A. T., Doyle, D. H., Saxon, L. E., Sinclair, E., Strickland, M. L., Utley, R., Waugh, of Physics, A. S. Wilson D. e. p. t., Astronomy, University of, Glasgow, Glasgow G12, 8qq, U. K. o. A., Dannemann20, U., Holm, D., Horstmann, R., Sinkus21, K., Wick Hamburg University, Physics, I. Institute of E. x. p., D., 22761 Hamburg, Germany c. B. D., Burow22, L., Hagge16, E., Lohrmann, G., Poelz, W., Schott, F., Zetsche Hamburg University, Physics, I. I. Institute of E. x. p., Germany c. T. C., Bacon, N., Bru¨ mmer, I., Butterworth, V. L., Harri, G., Howell, B. H. Y., Hung, L., Lamberti23, K. R., Long, D. B., Miller, N., Pavel, A., Prinias24, J. K., Sedgbeer, D., Sideri, A. F., Whitfield Imperial College London, High Energy Nuclear Physics, Group, London SW7, 2bz, U. K. o. U., Mallik, M. Z., Wang, S. M., Wang, J. T., Wu University of Iowa, Physics, Astronomy, Dept, Iowa, City, Ia, 52242, USA p. P., Cloth, D., Filges Forschungszentrum Ju¨ lich, Institut fu¨ r., Kernphysik, D., 52405 Ju¨ lich, Germany S. H., An, G. H., Cho, B. J., Ko, S. B., Lee, S. W., Nam, H. S., Park, S. K., Park Korea University, Seoul 136, 701, Korea h. S., Kartik, H. J., Kim, R. R., Mcneil, W., Metcalf, V. K., Nadendla Louisiana State University, Baton, Rouge, LA 70803, 4001, USA p. F., Barreiro, J. P., Fernandez, R., Graciani, J. M., Herna´ndez, L., Herva´, L., Labarga, M., Martinez, J., del Peso, J., Puga, J., Terron, Auto´ noma Madrid, J. F. de Troco´ niz U. n. i. v. e. r., Depto de F´ısica Teo´, R´ıca, E., 28049 Madrid, Spain n. F., Corriveau, D. S., Hanna, J., Hartmann, L. W., Hung, J. N., Lim, C. G., Matthews25, W. N., Murray, A., Och, P. M., Patel, M., Riveline, D. G., Stair, M., St Laurent, R., Ullmann, G., Zacek25 McGill University, Montre´al, PQ H3A, 2t8, Canada, A, b. T., Tsurugai Meiji Gakuin University, Faculty of General, Education, Yokohama, 244, Japan V., Bashkirov, B. A., Dolgoshein, A., Stifutkin Moscow Engineering Physics Institute, RU 115 409, Moscow, Russia l. G. L., Bashindzhagyan26, P. F., Ermolov, L. K., Gladilin, Golubkov, Y. u. A., V. D., Kobrin, I. A., Korzhavina, V. A., Kuzmin, Lukina, O. Y. u., A. S., Proskuryakov, A. A., Savin, L. M., Shcheglova, A. N., Solomin, N. P., Zotov Moscow State University, Institute of Nuclear, Physic, RU 119 899, Moscow, Russia m. M., Botje, F., Chlebana, J., Engelen, M., de Kamp, P., Kooijman, A., Kruse, A., van Sighem, H., Tiecke, W., Verkerke, J., Vossebeld, M., Vreeswijk, L., Wigger, E., de Wolf, R., van Woudenberg27 NIKHEF, University of, Amsterdam, NL 1009 DB, Amsterdam, Netherlands i. D., Acosta, B., Bylsma, L. S., Durkin, J., Gilmore, C. M., Ginsburg, C. L., Kim, C., Li, T. Y., Ling, P., Nylander, I. H., Park, T. A., Romanowski28 Ohio State University, Physics, Department, Columbus, OH 43210, 1106, USA p. D. S., Bailey, R. J., Cashmore29, A. M., Cooper Sarkar, R. C. E., Devenish, N., Harnew, M., Lancaster30, L., Lindemann, J. D., Mcfall, C., Nath, V. A., Noyes24, A., Quadt, J. R., Tickner, H., Uijterwaal, R., Walczak, D. S., Water, F. F., Wilson, T., Yip Department of Physic, University of, Oxford, Oxford, U. K. o. A., Bertolin, R., Brugnera, R., Carlin, F., Dal Corso, M., De Giorgi, U., Dosselli, S., Limentani, M., Morandin, M., Posocco, L., Stanco, R., Stroili, C., Voci, F., Zuin Dipartimento di Fisica dell’ Universita, Infn, I., 35131 Padova, Italy f. J., Bulmahn, R. G., Feild31, B. Y., Oh, J. J., Whitmore Pennsylvania State University, University, Park, Pa, 16802, USA q. G., D’Agostini, G., Marini, A., Nigro Dipartimento di Fisica, ’La Sapienza’, U. n. i. v., I., 00185 Rome, Italy f. J. C., Hart, N. A., Mccubbin, T. P., Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11, 0qx, U. K. o. E., Barberi, T., Dubb, C., Heusch, M., Van Hook, W., Lockman, J. T., Rahn, H. F. W., Sadrozinski, A., Seiden, D. C., Williams University of California, Santa, Cruz, Ca, 93106, USA p. J., Biltzinger, R. J., Seifert, O., Schwarzer, A. H., Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D., 57012 Siegen, Germany c. H., Abramowicz, G., Briskin, S., Dagan32, T., Doeker32, A., Levy26 Raymond, Beverly Sackler Faculty of Exact, Science, School of, Physic, Tel Aviv, University, Tel Aviv, 69978, Israel e. J. I., Fleck33, M., Inuzuka, T., Ishii, M., Kuze, S., Mine, M., Nakao, I., Suzuki, K., Tokushuku, K., Umemori, S., Yamada, Y., Yamazaki Institute for Nuclear Study, University of, Tokyo, Tokyo, 113, Japan g. M., Chiba, R., Hamatsu, T., Hirose, K., Homma, S., Kitamura34, T., Matsushita, K., Yamauchi Tokyo Metropolitan University, Tokyo 192, 03, Japan g. R., Cirio, M., Costa, M. I., Ferrero, S., Maselli, C., Peroni, R., Sacchi, A., Solano, A., Staiano Universita di Torino, Dipartimento di Fisica, Sperimentale, I., 10129 Torino, Italy f. M., Dardo II Faculty of Science, Torino, University, Infn, Alessandria, Italy f. D. C., Bailey, F., Benard, M., Brkic, C. P., Fagerstroem, G. F., Hartner, K. K., Joo, G. M., Levman, J. F., Martin, R. S., Orr, S., Polenz, C. R., Sampson, D., Simmon, R. J., Teuscher University of Toronto, Toronto, ON M5S, 1a7, Canada a. J. M., Butterworth, C. D., Catterall, T. W., Jone, P. B., Kaziewicz, J. B., Lane, R. L., Saunder, J., Shulman, M. R., Sutton University College London, London WC1E, 6bt, U. K. o. B., Lu, L. W., Mo Virginia Polytechnic Inst, State, University, Physics, Dept, Blacksburg, Va, 24061, USA q. W., Bogusz, J., Ciborowski, J., Gajewski, G., Grzelak35, M., Kasprzak, M., Krzyz˙anowski, K., Muchorowski36, R. J., Nowak, J. M., Pawlak, T., Tymieniecka, A. K., Wro´ blewski, J. A., Zakrzewski, A. F., Z˙ arnecki Warsaw University, Institute of Experimental, Physic, PL 00681, Warsaw, Poland j. M., Adamus Institute for Nuclear Studie, Poland j. C., Coldewey, Y., Eisenberg32, D., Hochman, U., Karshon32, D., Revel32, D., Zer Zion Weizmann Institute, Nuclear Physics, Dept, Rehovot, 76100, Israel d. W. F., Badgett, J., Breitweg, D., Chapin, R., Cro, S., Dasu, C., Fouda, R. J., Lovele, S., Mattingly, D. D., Reeder, S., Silverstein, W. H., Smith, A., Vaiciuli, M., Wodarczyk University of Wisconsin, Madison, Wi, 53706, USA p. S., Bhadra, M. L., Cardy37, W. R., Frisken, M., Khakzad, W. B., Schmidke York University, North, York, Toronto ON M3J, 1p3, and Canada, A.
Abstract: Measurements are presented of dijet cross sections in diffractive photoproduction and of D*(+/-) production in diffractive deep inelastic scattering at HERA. A combined QCD analysis of the diffractive dijet cross sections and diffractive structure function results leads to a picture in which the pomeron has a substantial gluon component with a hard momentum spectrum.
Published: 1997

17. Fragmentation functions at ZEUS

Author: ZEUS Collaboration M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasin´ ski, J. Repond, R. Stanek, R. L. Ta laga, H. Zhang Argonne National Laboratory, Argonne, IL 60439, USA p. M. C. K. Mattingly Andrews University, Berrien Springs, USA F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini1, L. Cifarelli2, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, A. Polini, G. Sartorelli, Y. Zamora Garcia3, A. Zichichi University, INFN Bologna, I. 40126 Bologna, Italy f. C. Amelung, A. Bornheim, J. Crittenden, R. Deffner, M. Eckert, L. Feld, A. Frey4, M. Geerts5, M. Grothe, H. Hartmann, K. Heinloth, L. Heinz, E. Hilger, H. P. Jakob, U. F. Katz, S. Mengel6, E. Paul, M. Pfeiffer, C.h. Rembser, D. Schramm7, J. Stamm, R. Wedemeyer Physikalisches Institut der Universita¨t Bonn, D. 53115 Bonn, Germany c. S. Campbell Robson, A. Cassidy, W. N. Cottingham, N. Dyce, B. Foster, S. George, M. E. Hayes, G. P. Heath, H. F. Heath, D. Piccioni, D. G. Roff, R. J. Tapper, R. Yoshida H. H. Wills Physics Laboratory, University of Bristol, Bristol B58 1TL, U. K. o. M. Arneodo8, R. Ayad, M. Capua, A. Garfagnini, L. Iannotti, M. Schioppa, G. Susinno Calabria University, Physics D.e.p.t. and INFN, Cosenza, Italy f. A. Caldwell9, N. Cartiglia, Z. Jing, W. Liu, J. A. Parsons, S. Ritz10, F. Sciulli, P. B. Straub, L. Wai11, S. Yang12, Q. Zhu Columbia University, Nevis Labs, Irvington on Hudson, NY 10533, USA q. P. Borzemski, J. Chwastowski, A. Eskreys, Z. Jakubowski, M. B. Przybycien´, M. Zachara, L. Zawiejski I.n.s.t. of Nuclear Physics, PL 30055 Cracow, Poland j. L. Adamczyk, B. Bednarek, K. Jelen´, D. Kisielewska, T. Kowalski, M. Przybycien´, E. Rulikowska Zare¸bska, L. Suszycki, J. Zaja¸c Faculty of Physics, Nuclear Techniques, Academy of Mining, Metallurgy, Poland j. Z. Dulin´ ski, A. Kotan´ ski Jagellonian Univ, D.e.p.t. of Physics, PL 30059 Cracow, Poland k. G. Abbiendi13, L. A. T. Bauerdick, U. Behrens, H. Beier, J. K. Bienlein, G. Cases, O. Deppe, K. Desler, G. Drews, M. Flasin´ ski14, D. J. Gilkinson, C. Glasman, P. Go¨ ttlicher, J. Große Knetter, T. Haas, W. Hain, D. Hasell, H. Heßling, Y. Iga, K. F. Johnson15, P. Joos, M. Kasemann, R. Klanner, W. Koch, U. Ko¨ tz, H. Kowalski, J. Labs, A. Ladage, B. Lo¨ hr, M. Lo¨ we, D. Lu¨ ke, J. Mainusch16, O. Man´ czak, J. Milewski, T. Monteiro17, J. S. T. Ng, D. Notz, K. Ohrenberg, K. Piotrzkowski, M. Roco, M. Rohde, J. Rolda´n, U. Schneekloth, W. Schulz, F. Selonke, B. Surrow, E. Tassi, T. Voß, D. Westphal, G. Wolf, U. Wollmer, C. Youngman, W. Zeuner Deutsches Elektronen Synchrotron DESY, D. 22603 Hamburg, Germany H. J. Grabosch, A. Meyer, S. Schlenstedt DESY IfH Zeuthen, D. 15738 Zeuthen, Germany G. Barbagli, E. Gallo, P. Pelfer University, INFN, Florence, Italy f. G. Maccarrone, S. De Pasquale, L. Votano INFN, Laboratori Nazionali di Frascati, I. 00044 Frascati, Italy f. A. Bamberger, S. Eisenhardt, T. Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B.r., D. 79104 Freiburg i. B.r., Germany c. J. T. Bromley, N. H. Brook, P. J. Bussey, A. T. Doyle, D. H. Saxon, L. E. Sinclair, E. Strickland, M. L. Utley, R. Waugh, A. S. Wilson D.e.p.t. of Physics, Astronomy, University of Glasgow, Glasgow G12 8QQ, U. K. o. A. Dannemann20, U. Holm, D. Horstmann, R. Sinkus21, K. Wick Hamburg University, I. Institute of E.x.p. Physics, D. 22761 Hamburg, Germany c. B. D. Burow22, L. Hagge16, E. Lohrmann, G. Poelz, W. Schott, F. Zetsche Hamburg University, I.I. Institute of E.x.p. Physics, Germany c. T. C. Bacon, N. Bru¨ mmer, I. Butterworth, V. L. Harris, G. Howell, B. H. Y. Hung, L. Lamberti23, K. R. Long, D. B. Miller, N. Pavel, A. Prinias24, J. K. Sedgbeer, D. Sideris, A. F. Whitfield Imperial College London, High Energy Nuclear Physics Group, London SW7 2BZ, U. K. o. U. Mallik, M. Z. Wang, S. M. Wang, J. T. Wu University of Iowa, Physics, Astronomy Dept, Iowa City, IA 52242, USA p. P. Cloth, D. Filges Forschungszentrum Ju¨ lich, Institut fu¨ r. Kernphysik, D. 52405 Ju¨ lich, Germany S. H. An, G. H. Cho, B. J. Ko, S. B. Lee, S. W. Nam, H. S. Park, S. K. Park Korea University, Seoul 136 701, Korea h. S. Kartik, H. J. Kim, R. R. McNeil, W. Metcalf, V. K. Nadendla Louisiana State University, Baton Rouge, LA 70803 4001, USA p. F. Barreiro, J. P. Fernandez, R. Graciani, J. M. Herna´ndez, L. Herva´s, L. Labarga, M. Martinez, J. del Peso, J. Puga, J. Terron, J. F. de Troco´ niz U.n.i.v.e.r. Auto´ noma Madrid, Depto de F´ısica Teo´ r´ıca, E. 28049 Madrid, Spain n. F. Corriveau, D. S. Hanna, J. Hartmann, L. W. Hung, J. N. Lim, C. G. Matthews25, W. N. Murray, A. Ochs, P. M. Patel, M. Riveline, D. G. Stairs, M. St Laurent, R. Ullmann, G. Zacek25 McGill University, Montre´al, PQ H3A 2T8, Canada a, b. T. Tsurugai Meiji Gakuin University, Faculty of General Education, Yokohama 244, Japan V. Bashkirov, B. A. Dolgoshein, A. Stifutkin Moscow Engineering Physics Institute, RU 115 409 Moscow, Russia l. G. L. Bashindzhagyan26, P. F. Ermolov, L. K. Gladilin, Y.u. A. Golubkov, V. D. Kobrin, I. A. Korzhavina, V. A. Kuzmin, O. Y.u. Lukina, A. S. Proskuryakov, A. A. Savin, L. M. Shcheglova, A. N. Solomin, N. P. Zotov Moscow State University, Institute of Nuclear Physics, RU 119 899 Moscow, Russia m. M. Botje, F. Chlebana, J. Engelen, M. de Kamps, P. Kooijman, A. Kruse, A. van Sighem, H. Tiecke, W. Verkerke, J. Vossebeld, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg27 NIKHEF, University of Amsterdam, NL 1009 DB Amsterdam, Netherlands i. D. Acosta, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, C. Li, T. Y. Ling, P. Nylander, I. H. Park, T. A. Romanowski28 Ohio State University, Physics Department, Columbus, OH 43210 1106, USA p. D. S. Bailey, R. J. Cashmore29, A. M. Cooper Sarkar, R. C. E. Devenish, N. Harnew, M. Lancaster30, L. Lindemann, J. D. McFall, C. Nath, V. A. Noyes24, A. Quadt, J. R. Tickner, H. Uijterwaal, R. Walczak, D. S. Waters, F. F. Wilson, T. Yip Department of Physics, University of Oxford, Oxford, U. K. o. A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, F. Zuin Dipartimento di Fisica dell’ Universita, INFN, I. 35131 Padova, Italy f. J. Bulmahn, R. G. Feild31, B. Y. Oh, J. J. Whitmore Pennsylvania State University, University Park, PA 16802, USA q. G. D’Agostini, G. Marini, A. Nigro Dipartimento di Fisica, U.n.i.v. ’La Sapienza’, I. 00185 Rome, Italy f. J. C. Hart, N. A. McCubbin, T. P. Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U. K. o. E. Barberis, T. Dubbs, C. Heusch, M. Van Hook, W. Lockman, J. T. Rahn, H. F. W. Sadrozinski, A. Seiden, D. C. Williams University of California, Santa Cruz, CA 93106, USA p. J. Biltzinger, R. J. Seifert, O. Schwarzer, A. H. Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D. 57012 Siegen, Germany c. H. Abramowicz, G. Briskin, S. Dagan32, T. Doeker32, A. Levy26 Raymond, Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv 69978, Israel e. J. I. Fleck33, M. Inuzuka, T. Ishii, M. Kuze, S. Mine, M. Nakao, I. Suzuki, K. Tokushuku, K. Umemori, S. Yamada, Y. Yamazaki Institute for Nuclear Study, University of Tokyo, Tokyo 113, Japan g. M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura34, T. Matsushita, K. Yamauchi Tokyo Metropolitan University, Tokyo 192 03, Japan g. R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano Universita di Torino, Dipartimento di Fisica Sperimentale, I. 10129 Torino, Italy f. M. Dardo II Faculty of Sciences, Torino University, INFN Alessandria, Italy f. D. C. Bailey, F. Benard, M. Brkic, C. P. Fagerstroem, G. F. Hartner, K. K. Joo, G. M. Levman, J. F. Martin, R. S. Orr, S. Polenz, C. R. Sampson, D. Simmons, R. J. Teuscher University of Toronto, Toronto, ON M5S 1A7, Canada a. J. M. Butterworth, C. D. Catterall, T. W. Jones, P. B. Kaziewicz, J. B. Lane, R. L. Saunders, J. Shulman, M. R. Sutton University College London, London WC1E 6BT, U. K. o. B. Lu, L. W. Mo Virginia Polytechnic Inst, State University, Physics Dept, Blacksburg, VA 24061, USA q. W. Bogusz, J. Ciborowski, J. Gajewski, G. Grzelak35, M. Kasprzak, M. Krzyz˙anowski, K. Muchorowski36, R. J. Nowak, J. M. Pawlak, T. Tymieniecka, A. K. Wro´ blewski, J. A. Zakrzewski, A. F. Z˙ arnecki Warsaw University, Institute of Experimental Physics, PL 00681 Warsaw, Poland j. M. Adamus Institute for Nuclear Studies, Poland j. C. Coldewey, Y. Eisenberg32, D. Hochman, U. Karshon32, D. Revel32, D. Zer Zion Weizmann Institute, Nuclear Physics Dept, Rehovot 76100, Israel d. W. F. Badgett, J. Breitweg, D. Chapin, R. Cross, S. Dasu, C. Foudas, R. J. Loveless, S. Mattingly, D. D. Reeder, S. Silverstein, W. H. Smith, A. Vaiciulis, M. Wodarczyk University of Wisconsin, Madison, WI 53706, USA p. S. Bhadra, M. L. Cardy37, W. R. Frisken, M. Khakzad, W. B. Schmidke York University, North York, Toronto ON M3J 1P3, Canada a., MARI, Stefano Maria, ZEUS Collaboration M., Derrick, D., Krakauer, S., Magill, D., Mikuna, B., Musgrave, J. R., Okrasin´ ski, J., Repond, R., Stanek, R. L., Ta laga, H., Zhang Argonne National Laboratory, Argonne, Il, 60439, USA p. M. C. K., Mattingly Andrews University, Berrien, Spring, Mi, USA F., Anselmo, P., Antonioli, G., Bari, M., Basile, L., Bellagamba, D., Boscherini, A., Bruni, G., Bruni, P., Bruni, G., Cara Romeo, G., Castellini1, L., Cifarelli2, F., Cindolo, A., Contin, M., Corradi, I., Giala, P., Giusti, G., Iacobucci, G., Laurenti, G., Levi, A., Margotti, T., Massam, R., Nania, F., Palmonari, A., Pesci, A., Polini, G., Sartorelli, Y., Zamora Garcia3, A., Zichichi University, Infn, Bologna, I., 40126 Bologna, Italy f. C., Amelung, A., Bornheim, J., Crittenden, R., Deffner, M., Eckert, L., Feld, A., Frey4, M., Geerts5, M., Grothe, H., Hartmann, K., Heinloth, L., Heinz, E., Hilger, H. P., Jakob, U. F., Katz, S., Mengel6, E., Paul, M., Pfeiffer, Rembser, C. h., D., Schramm7, J., Stamm, R., Wedemeyer Physikalisches Institut der Universita¨t Bonn, D., 53115 Bonn, Germany c. S., Campbell Robson, A., Cassidy, W. N., Cottingham, N., Dyce, B., Foster, S., George, M. E., Haye, G. P., Heath, H. F., Heath, D., Piccioni, D. G., Roff, R. J., Tapper, R. Yoshida H. H., Wills Physics Laboratory, University of, Bristol, Bristol B58, 1tl, U. K. o. M., Arneodo8, R., Ayad, M., Capua, A., Garfagnini, L., Iannotti, M., Schioppa, G., Susinno Calabria University, and INFN, Physics D. e. p. t., Cosenza, Italy f. A., Caldwell9, N., Cartiglia, Z., Jing, W., Liu, J. A., Parson, S., Ritz10, F., Sciulli, P. B., Straub, L., Wai11, S., Yang12, Q., Zhu Columbia University, Nevis, Lab, Irvington on, Hudson, Ny, 10533, USA q. P., Borzemski, J., Chwastowski, A., Eskrey, Z., Jakubowski, M. B., Przybycien´, M., Zachara, of Nuclear Physics, L. Zawiejski I. n. s. t., PL 30055, Cracow, Poland j. L., Adamczyk, B., Bednarek, K., Jelen´, D., Kisielewska, T., Kowalski, M., Przybycien´, E., Rulikowska Zare¸bska, L., Suszycki, J., Zaja¸c Faculty of Physic, Nuclear, Technique, Academy of, Mining, Metallurgy, Poland j. Z., Dulin´ ski, A., Kotan´ ski Jagellonian Univ, of Physics, D. e. p. t., PL 30059, Cracow, Poland k. G., Abbiendi13, L. A. T., Bauerdick, U., Behren, H., Beier, J. K., Bienlein, G., Case, O., Deppe, K., Desler, G., Drew, M., Flasin´ ski14, D. J., Gilkinson, C., Glasman, P., Go¨ ttlicher, J., Große Knetter, T., Haa, W., Hain, D., Hasell, H., Heßling, Y., Iga, K. F., Johnson15, P., Joo, M., Kasemann, R., Klanner, W., Koch, U., Ko¨ tz, H., Kowalski, J., Lab, A., Ladage, B., Lo¨ hr, M., Lo¨ we, D., Lu¨ ke, J., Mainusch16, O., Man´ czak, J., Milewski, T., Monteiro17, J. S. T., Ng, D., Notz, K., Ohrenberg, K., Piotrzkowski, M., Roco, M., Rohde, J., Rolda´n, U., Schneekloth, W., Schulz, F., Selonke, B., Surrow, E., Tassi, T., Voß, D., Westphal, G., Wolf, U., Wollmer, C., Youngman, W., Zeuner Deutsches Elektronen Synchrotron DESY, D., 22603 Hamburg, Germany H. J., Grabosch, Mari, Stefano Maria, A., Meyer, S., Schlenstedt DESY IfH Zeuthen, D., 15738 Zeuthen, Germany G., Barbagli, E., Gallo, P., Pelfer University, Infn, Florence, Italy f. G., Maccarrone, S., De Pasquale, L., Votano INFN, Laboratori Nazionali di, Frascati, I., 00044 Frascati, Italy f. A., Bamberger, S., Eisenhardt, T., Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B., R., D. 79104 Freiburg i. B., R., Germany c. J. T., Bromley, N. H., Brook, P. J., Bussey, A. T., Doyle, D. H., Saxon, L. E., Sinclair, E., Strickland, M. L., Utley, R., Waugh, of Physics, A. S. Wilson D. e. p. t., Astronomy, University of, Glasgow, Glasgow G12, 8qq, U. K. o. A., Dannemann20, U., Holm, D., Horstmann, R., Sinkus21, K., Wick Hamburg University, Physics, I. Institute of E. x. p., D., 22761 Hamburg, Germany c. B. D., Burow22, L., Hagge16, E., Lohrmann, G., Poelz, W., Schott, F., Zetsche Hamburg University, Physics, I. I. Institute of E. x. p., Germany c. T. C., Bacon, N., Bru¨ mmer, I., Butterworth, V. L., Harri, G., Howell, B. H. Y., Hung, L., Lamberti23, K. R., Long, D. B., Miller, N., Pavel, A., Prinias24, J. K., Sedgbeer, D., Sideri, A. F., Whitfield Imperial College London, High Energy Nuclear Physics, Group, London SW7, 2bz, U. K. o. U., Mallik, M. Z., Wang, S. M., Wang, J. T., Wu University of Iowa, Physics, Astronomy, Dept, Iowa, City, Ia, 52242, USA p. P., Cloth, D., Filges Forschungszentrum Ju¨ lich, Institut fu¨ r., Kernphysik, D., 52405 Ju¨ lich, Germany S. H., An, G. H., Cho, B. J., Ko, S. B., Lee, S. W., Nam, H. S., Park, S. K., Park Korea University, Seoul 136, 701, Korea h. S., Kartik, H. J., Kim, R. R., Mcneil, W., Metcalf, V. K., Nadendla Louisiana State University, Baton, Rouge, LA 70803, 4001, USA p. F., Barreiro, J. P., Fernandez, R., Graciani, J. M., Herna´ndez, L., Herva´, L., Labarga, M., Martinez, J., del Peso, J., Puga, J., Terron, Auto´ noma Madrid, J. F. de Troco´ niz U. n. i. v. e. r., Depto de F´ısica Teo´, R´ıca, E., 28049 Madrid, Spain n. F., Corriveau, D. S., Hanna, J., Hartmann, L. W., Hung, J. N., Lim, C. G., Matthews25, W. N., Murray, A., Och, P. M., Patel, M., Riveline, D. G., Stair, M., St Laurent, R., Ullmann, G., Zacek25 McGill University, Montre´al, PQ H3A, 2t8, Canada, A, b. T., Tsurugai Meiji Gakuin University, Faculty of General, Education, Yokohama, 244, Japan V., Bashkirov, B. A., Dolgoshein, A., Stifutkin Moscow Engineering Physics Institute, RU 115 409, Moscow, Russia l. G. L., Bashindzhagyan26, P. F., Ermolov, L. K., Gladilin, Golubkov, Y. u. A., V. D., Kobrin, I. A., Korzhavina, V. A., Kuzmin, Lukina, O. Y. u., A. S., Proskuryakov, A. A., Savin, L. M., Shcheglova, A. N., Solomin, N. P., Zotov Moscow State University, Institute of Nuclear, Physic, RU 119 899, Moscow, Russia m. M., Botje, F., Chlebana, J., Engelen, M., de Kamp, P., Kooijman, A., Kruse, A., van Sighem, H., Tiecke, W., Verkerke, J., Vossebeld, M., Vreeswijk, L., Wigger, E., de Wolf, R., van Woudenberg27 NIKHEF, University of, Amsterdam, NL 1009 DB, Amsterdam, Netherlands i. D., Acosta, B., Bylsma, L. S., Durkin, J., Gilmore, C. M., Ginsburg, C. L., Kim, C., Li, T. Y., Ling, P., Nylander, I. H., Park, T. A., Romanowski28 Ohio State University, Physics, Department, Columbus, OH 43210, 1106, USA p. D. S., Bailey, R. J., Cashmore29, A. M., Cooper Sarkar, R. C. E., Devenish, N., Harnew, M., Lancaster30, L., Lindemann, J. D., Mcfall, C., Nath, V. A., Noyes24, A., Quadt, J. R., Tickner, H., Uijterwaal, R., Walczak, D. S., Water, F. F., Wilson, T., Yip Department of Physic, University of, Oxford, Oxford, U. K. o. A., Bertolin, R., Brugnera, R., Carlin, F., Dal Corso, M., De Giorgi, U., Dosselli, S., Limentani, M., Morandin, M., Posocco, L., Stanco, R., Stroili, C., Voci, F., Zuin Dipartimento di Fisica dell’ Universita, Infn, I., 35131 Padova, Italy f. J., Bulmahn, R. G., Feild31, B. Y., Oh, J. J., Whitmore Pennsylvania State University, University, Park, Pa, 16802, USA q. G., D’Agostini, G., Marini, A., Nigro Dipartimento di Fisica, ’La Sapienza’, U. n. i. v., I., 00185 Rome, Italy f. J. C., Hart, N. A., Mccubbin, T. P., Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11, 0qx, U. K. o. E., Barberi, T., Dubb, C., Heusch, M., Van Hook, W., Lockman, J. T., Rahn, H. F. W., Sadrozinski, A., Seiden, D. C., Williams University of California, Santa, Cruz, Ca, 93106, USA p. J., Biltzinger, R. J., Seifert, O., Schwarzer, A. H., Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D., 57012 Siegen, Germany c. H., Abramowicz, G., Briskin, S., Dagan32, T., Doeker32, A., Levy26 Raymond, Beverly Sackler Faculty of Exact, Science, School of, Physic, Tel Aviv, University, Tel Aviv, 69978, Israel e. J. I., Fleck33, M., Inuzuka, T., Ishii, M., Kuze, S., Mine, M., Nakao, I., Suzuki, K., Tokushuku, K., Umemori, S., Yamada, Y., Yamazaki Institute for Nuclear Study, University of, Tokyo, Tokyo, 113, Japan g. M., Chiba, R., Hamatsu, T., Hirose, K., Homma, S., Kitamura34, T., Matsushita, K., Yamauchi Tokyo Metropolitan University, Tokyo 192, 03, Japan g. R., Cirio, M., Costa, M. I., Ferrero, S., Maselli, C., Peroni, R., Sacchi, A., Solano, A., Staiano Universita di Torino, Dipartimento di Fisica, Sperimentale, I., 10129 Torino, Italy f. M., Dardo II Faculty of Science, Torino, University, Infn, Alessandria, Italy f. D. C., Bailey, F., Benard, M., Brkic, C. P., Fagerstroem, G. F., Hartner, K. K., Joo, G. M., Levman, J. F., Martin, R. S., Orr, S., Polenz, C. R., Sampson, D., Simmon, R. J., Teuscher University of Toronto, Toronto, ON M5S, 1a7, Canada a. J. M., Butterworth, C. D., Catterall, T. W., Jone, P. B., Kaziewicz, J. B., Lane, R. L., Saunder, J., Shulman, M. R., Sutton University College London, London WC1E, 6bt, U. K. o. B., Lu, L. W., Mo Virginia Polytechnic Inst, State, University, Physics, Dept, Blacksburg, Va, 24061, USA q. W., Bogusz, J., Ciborowski, J., Gajewski, G., Grzelak35, M., Kasprzak, M., Krzyz˙anowski, K., Muchorowski36, R. J., Nowak, J. M., Pawlak, T., Tymieniecka, A. K., Wro´ blewski, J. A., Zakrzewski, A. F., Z˙ arnecki Warsaw University, Institute of Experimental, Physic, PL 00681, Warsaw, Poland j. M., Adamus Institute for Nuclear Studie, Poland j. C., Coldewey, Y., Eisenberg32, D., Hochman, U., Karshon32, D., Revel32, D., Zer Zion Weizmann Institute, Nuclear Physics, Dept, Rehovot, 76100, Israel d. W. F., Badgett, J., Breitweg, D., Chapin, R., Cro, S., Dasu, C., Fouda, R. J., Lovele, S., Mattingly, D. D., Reeder, S., Silverstein, W. H., Smith, A., Vaiciuli, M., Wodarczyk University of Wisconsin, Madison, Wi, 53706, USA p. S., Bhadra, M. L., Cardy37, W. R., Frisken, M., Khakzad, W. B., Schmidke York University, North, York, Toronto ON M3J, 1p3, and Canada, A.
Abstract: The scaled momentum spectra of final state charged hadrons produced in Deep Inelastic Scattering in the ranges 10 < Q(2) < 1280 GeV2 and 6 . 10(-4) < x(Bjorken) < 5 . 10(-2) have been measured in the current region of the Breit frame using the ZEUS detector. The evolution with Q(2) of the scaled momentum, x(p) = 2p(Breit)/Q, has been investigated and preliminary results are presented which show evidence for scaling violations and support for the universality of quark fragmentation.
Published: 1997

18. D* and J/psi inelastic photoproduction at HERA

Author: ZEUS Collaboration M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasin´ ski, J. Repond, R. Stanek, R. L. Ta laga, H. Zhang Argonne National Laboratory, Argonne, IL 60439, USA p. M. C. K. Mattingly Andrews University, Berrien Springs, USA F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini1, L. Cifarelli2, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, A. Polini, G. Sartorelli, Y. Zamora Garcia3, A. Zichichi University, INFN Bologna, I. 40126 Bologna, Italy f. C. Amelung, A. Bornheim, J. Crittenden, R. Deffner, M. Eckert, L. Feld, A. Frey4, M. Geerts5, M. Grothe, H. Hartmann, K. Heinloth, L. Heinz, E. Hilger, H. P. Jakob, U. F. Katz, S. Mengel6, E. Paul, M. Pfeiffer, C.h. Rembser, D. Schramm7, J. Stamm, R. Wedemeyer Physikalisches Institut der Universita¨t Bonn, D. 53115 Bonn, Germany c. S. Campbell Robson, A. Cassidy, W. N. Cottingham, N. Dyce, B. Foster, S. George, M. E. Hayes, G. P. Heath, H. F. Heath, D. Piccioni, D. G. Roff, R. J. Tapper, R. Yoshida H. H. Wills Physics Laboratory, University of Bristol, Bristol B58 1TL, U. K. o. M. Arneodo8, R. Ayad, M. Capua, A. Garfagnini, L. Iannotti, M. Schioppa, G. Susinno Calabria University, Physics D.e.p.t. and INFN, Cosenza, Italy f. A. Caldwell9, N. Cartiglia, Z. Jing, W. Liu, J. A. Parsons, S. Ritz10, F. Sciulli, P. B. Straub, L. Wai11, S. Yang12, Q. Zhu Columbia University, Nevis Labs, Irvington on Hudson, NY 10533, USA q. P. Borzemski, J. Chwastowski, A. Eskreys, Z. Jakubowski, M. B. Przybycien´, M. Zachara, L. Zawiejski I.n.s.t. of Nuclear Physics, PL 30055 Cracow, Poland j. L. Adamczyk, B. Bednarek, K. Jelen´, D. Kisielewska, T. Kowalski, M. Przybycien´, E. Rulikowska Zare¸bska, L. Suszycki, J. Zaja¸c Faculty of Physics, Nuclear Techniques, Academy of Mining, Metallurgy, Poland j. Z. Dulin´ ski, A. Kotan´ ski Jagellonian Univ, D.e.p.t. of Physics, PL 30059 Cracow, Poland k. G. Abbiendi13, L. A. T. Bauerdick, U. Behrens, H. Beier, J. K. Bienlein, G. Cases, O. Deppe, K. Desler, G. Drews, M. Flasin´ ski14, D. J. Gilkinson, C. Glasman, P. Go¨ ttlicher, J. Große Knetter, T. Haas, W. Hain, D. Hasell, H. Heßling, Y. Iga, K. F. Johnson15, P. Joos, M. Kasemann, R. Klanner, W. Koch, U. Ko¨ tz, H. Kowalski, J. Labs, A. Ladage, B. Lo¨ hr, M. Lo¨ we, D. Lu¨ ke, J. Mainusch16, O. Man´ czak, J. Milewski, T. Monteiro17, J. S. T. Ng, D. Notz, K. Ohrenberg, K. Piotrzkowski, M. Roco, M. Rohde, J. Rolda´n, U. Schneekloth, W. Schulz, F. Selonke, B. Surrow, E. Tassi, T. Voß, D. Westphal, G. Wolf, U. Wollmer, C. Youngman, W. Zeuner Deutsches Elektronen Synchrotron DESY, D. 22603 Hamburg, Germany H. J. Grabosch, A. Meyer, S. Schlenstedt DESY IfH Zeuthen, D. 15738 Zeuthen, Germany G. Barbagli, E. Gallo, P. Pelfer University, INFN, Florence, Italy f. G. Maccarrone, S. De Pasquale, L. Votano INFN, Laboratori Nazionali di Frascati, I. 00044 Frascati, Italy f. A. Bamberger, S. Eisenhardt, T. Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B.r., D. 79104 Freiburg i. B.r., Germany c. J. T. Bromley, N. H. Brook, P. J. Bussey, A. T. Doyle, D. H. Saxon, L. E. Sinclair, E. Strickland, M. L. Utley, R. Waugh, A. S. Wilson D.e.p.t. of Physics, Astronomy, University of Glasgow, Glasgow G12 8QQ, U. K. o. A. Dannemann20, U. Holm, D. Horstmann, R. Sinkus21, K. Wick Hamburg University, I. Institute of E.x.p. Physics, D. 22761 Hamburg, Germany c. B. D. Burow22, L. Hagge16, E. Lohrmann, G. Poelz, W. Schott, F. Zetsche Hamburg University, I.I. Institute of E.x.p. Physics, Germany c. T. C. Bacon, N. Bru¨ mmer, I. Butterworth, V. L. Harris, G. Howell, B. H. Y. Hung, L. Lamberti23, K. R. Long, D. B. Miller, N. Pavel, A. Prinias24, J. K. Sedgbeer, D. Sideris, A. F. Whitfield Imperial College London, High Energy Nuclear Physics Group, London SW7 2BZ, U. K. o. U. Mallik, M. Z. Wang, S. M. Wang, J. T. Wu University of Iowa, Physics, Astronomy Dept, Iowa City, IA 52242, USA p. P. Cloth, D. Filges Forschungszentrum Ju¨ lich, Institut fu¨ r. Kernphysik, D. 52405 Ju¨ lich, Germany S. H. An, G. H. Cho, B. J. Ko, S. B. Lee, S. W. Nam, H. S. Park, S. K. Park Korea University, Seoul 136 701, Korea h. S. Kartik, H. J. Kim, R. R. McNeil, W. Metcalf, V. K. Nadendla Louisiana State University, Baton Rouge, LA 70803 4001, USA p. F. Barreiro, J. P. Fernandez, R. Graciani, J. M. Herna´ndez, L. Herva´s, L. Labarga, M. Martinez, J. del Peso, J. Puga, J. Terron, J. F. de Troco´ niz U.n.i.v.e.r. Auto´ noma Madrid, Depto de F´ısica Teo´ r´ıca, E. 28049 Madrid, Spain n. F. Corriveau, D. S. Hanna, J. Hartmann, L. W. Hung, J. N. Lim, C. G. Matthews25, W. N. Murray, A. Ochs, P. M. Patel, M. Riveline, D. G. Stairs, M. St Laurent, R. Ullmann, G. Zacek25 McGill University, Montre´al, PQ H3A 2T8, Canada a, b. T. Tsurugai Meiji Gakuin University, Faculty of General Education, Yokohama 244, Japan V. Bashkirov, B. A. Dolgoshein, A. Stifutkin Moscow Engineering Physics Institute, RU 115 409 Moscow, Russia l. G. L. Bashindzhagyan26, P. F. Ermolov, L. K. Gladilin, Y.u. A. Golubkov, V. D. Kobrin, I. A. Korzhavina, V. A. Kuzmin, O. Y.u. Lukina, A. S. Proskuryakov, A. A. Savin, L. M. Shcheglova, A. N. Solomin, N. P. Zotov Moscow State University, Institute of Nuclear Physics, RU 119 899 Moscow, Russia m. M. Botje, F. Chlebana, J. Engelen, M. de Kamps, P. Kooijman, A. Kruse, A. van Sighem, H. Tiecke, W. Verkerke, J. Vossebeld, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg27 NIKHEF, University of Amsterdam, NL 1009 DB Amsterdam, Netherlands i. D. Acosta, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, C. Li, T. Y. Ling, P. Nylander, I. H. Park, T. A. Romanowski28 Ohio State University, Physics Department, Columbus, OH 43210 1106, USA p. D. S. Bailey, R. J. Cashmore29, A. M. Cooper Sarkar, R. C. E. Devenish, N. Harnew, M. Lancaster30, L. Lindemann, J. D. McFall, C. Nath, V. A. Noyes24, A. Quadt, J. R. Tickner, H. Uijterwaal, R. Walczak, D. S. Waters, F. F. Wilson, T. Yip Department of Physics, University of Oxford, Oxford, U. K. o. A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, F. Zuin Dipartimento di Fisica dell’ Universita, INFN, I. 35131 Padova, Italy f. J. Bulmahn, R. G. Feild31, B. Y. Oh, J. J. Whitmore Pennsylvania State University, University Park, PA 16802, USA q. G. D’Agostini, G. Marini, A. Nigro Dipartimento di Fisica, U.n.i.v. ’La Sapienza’, I. 00185 Rome, Italy f. J. C. Hart, N. A. McCubbin, T. P. Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U. K. o. E. Barberis, T. Dubbs, C. Heusch, M. Van Hook, W. Lockman, J. T. Rahn, H. F. W. Sadrozinski, A. Seiden, D. C. Williams University of California, Santa Cruz, CA 93106, USA p. J. Biltzinger, R. J. Seifert, O. Schwarzer, A. H. Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D. 57012 Siegen, Germany c. H. Abramowicz, G. Briskin, S. Dagan32, T. Doeker32, A. Levy26 Raymond, Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv 69978, Israel e. J. I. Fleck33, M. Inuzuka, T. Ishii, M. Kuze, S. Mine, M. Nakao, I. Suzuki, K. Tokushuku, K. Umemori, S. Yamada, Y. Yamazaki Institute for Nuclear Study, University of Tokyo, Tokyo 113, Japan g. M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura34, T. Matsushita, K. Yamauchi Tokyo Metropolitan University, Tokyo 192 03, Japan g. R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano Universita di Torino, Dipartimento di Fisica Sperimentale, I. 10129 Torino, Italy f. M. Dardo II Faculty of Sciences, Torino University, INFN Alessandria, Italy f. D. C. Bailey, F. Benard, M. Brkic, C. P. Fagerstroem, G. F. Hartner, K. K. Joo, G. M. Levman, J. F. Martin, R. S. Orr, S. Polenz, C. R. Sampson, D. Simmons, R. J. Teuscher University of Toronto, Toronto, ON M5S 1A7, Canada a. J. M. Butterworth, C. D. Catterall, T. W. Jones, P. B. Kaziewicz, J. B. Lane, R. L. Saunders, J. Shulman, M. R. Sutton University College London, London WC1E 6BT, U. K. o. B. Lu, L. W. Mo Virginia Polytechnic Inst, State University, Physics Dept, Blacksburg, VA 24061, USA q. W. Bogusz, J. Ciborowski, J. Gajewski, G. Grzelak35, M. Kasprzak, M. Krzyz˙anowski, K. Muchorowski36, R. J. Nowak, J. M. Pawlak, T. Tymieniecka, A. K. Wro´ blewski, J. A. Zakrzewski, A. F. Z˙ arnecki Warsaw University, Institute of Experimental Physics, PL 00681 Warsaw, Poland j. M. Adamus Institute for Nuclear Studies, Poland j. C. Coldewey, Y. Eisenberg32, D. Hochman, U. Karshon32, D. Revel32, D. Zer Zion Weizmann Institute, Nuclear Physics Dept, Rehovot 76100, Israel d. W. F. Badgett, J. Breitweg, D. Chapin, R. Cross, S. Dasu, C. Foudas, R. J. Loveless, S. Mattingly, D. D. Reeder, S. Silverstein, W. H. Smith, A. Vaiciulis, M. Wodarczyk University of Wisconsin, Madison, WI 53706, USA p. S. Bhadra, M. L. Cardy37, W. R. Frisken, M. Khakzad, W. B. Schmidke York University, North York, Toronto ON M3J 1P3, Canada a., MARI, Stefano Maria, ZEUS Collaboration M., Derrick, D., Krakauer, S., Magill, D., Mikuna, B., Musgrave, J. R., Okrasin´ ski, J., Repond, R., Stanek, R. L., Ta laga, H., Zhang Argonne National Laboratory, Argonne, Il, 60439, USA p. M. C. K., Mattingly Andrews University, Berrien, Spring, Mi, USA F., Anselmo, P., Antonioli, G., Bari, M., Basile, L., Bellagamba, D., Boscherini, A., Bruni, G., Bruni, P., Bruni, G., Cara Romeo, G., Castellini1, L., Cifarelli2, F., Cindolo, A., Contin, M., Corradi, I., Giala, P., Giusti, G., Iacobucci, G., Laurenti, G., Levi, A., Margotti, T., Massam, R., Nania, F., Palmonari, A., Pesci, A., Polini, G., Sartorelli, Y., Zamora Garcia3, A., Zichichi University, Infn, Bologna, I., 40126 Bologna, Italy f. C., Amelung, A., Bornheim, J., Crittenden, R., Deffner, M., Eckert, L., Feld, A., Frey4, M., Geerts5, M., Grothe, H., Hartmann, K., Heinloth, L., Heinz, E., Hilger, H. P., Jakob, U. F., Katz, S., Mengel6, E., Paul, M., Pfeiffer, Rembser, C. h., D., Schramm7, J., Stamm, R., Wedemeyer Physikalisches Institut der Universita¨t Bonn, D., 53115 Bonn, Germany c. S., Campbell Robson, A., Cassidy, W. N., Cottingham, N., Dyce, B., Foster, S., George, M. E., Haye, G. P., Heath, H. F., Heath, D., Piccioni, D. G., Roff, R. J., Tapper, R. Yoshida H. H., Wills Physics Laboratory, University of, Bristol, Bristol B58, 1tl, U. K. o. M., Arneodo8, R., Ayad, M., Capua, A., Garfagnini, L., Iannotti, M., Schioppa, G., Susinno Calabria University, and INFN, Physics D. e. p. t., Cosenza, Italy f. A., Caldwell9, N., Cartiglia, Z., Jing, W., Liu, J. A., Parson, S., Ritz10, F., Sciulli, P. B., Straub, L., Wai11, S., Yang12, Q., Zhu Columbia University, Nevis, Lab, Irvington on, Hudson, Ny, 10533, USA q. P., Borzemski, J., Chwastowski, A., Eskrey, Z., Jakubowski, M. B., Przybycien´, M., Zachara, of Nuclear Physics, L. Zawiejski I. n. s. t., PL 30055, Cracow, Poland j. L., Adamczyk, B., Bednarek, K., Jelen´, D., Kisielewska, T., Kowalski, M., Przybycien´, E., Rulikowska Zare¸bska, L., Suszycki, J., Zaja¸c Faculty of Physic, Nuclear, Technique, Academy of, Mining, Metallurgy, Poland j. Z., Dulin´ ski, A., Kotan´ ski Jagellonian Univ, of Physics, D. e. p. t., PL 30059, Cracow, Poland k. G., Abbiendi13, L. A. T., Bauerdick, U., Behren, H., Beier, J. K., Bienlein, G., Case, O., Deppe, K., Desler, G., Drew, M., Flasin´ ski14, D. J., Gilkinson, C., Glasman, P., Go¨ ttlicher, J., Große Knetter, T., Haa, W., Hain, D., Hasell, H., Heßling, Y., Iga, K. F., Johnson15, P., Joo, M., Kasemann, R., Klanner, W., Koch, U., Ko¨ tz, H., Kowalski, J., Lab, A., Ladage, B., Lo¨ hr, M., Lo¨ we, D., Lu¨ ke, J., Mainusch16, O., Man´ czak, J., Milewski, T., Monteiro17, J. S. T., Ng, D., Notz, K., Ohrenberg, K., Piotrzkowski, M., Roco, M., Rohde, J., Rolda´n, U., Schneekloth, W., Schulz, F., Selonke, B., Surrow, E., Tassi, T., Voß, D., Westphal, G., Wolf, U., Wollmer, C., Youngman, W., Zeuner Deutsches Elektronen Synchrotron DESY, D., 22603 Hamburg, Germany H. J., Grabosch, Mari, Stefano Maria, A., Meyer, S., Schlenstedt DESY IfH Zeuthen, D., 15738 Zeuthen, Germany G., Barbagli, E., Gallo, P., Pelfer University, Infn, Florence, Italy f. G., Maccarrone, S., De Pasquale, L., Votano INFN, Laboratori Nazionali di, Frascati, I., 00044 Frascati, Italy f. A., Bamberger, S., Eisenhardt, T., Trefzger19, S. Wo¨ lfle Fakulta¨t fu¨ r. Physik der Universita¨t Freiburg i. B., R., D. 79104 Freiburg i. B., R., Germany c. J. T., Bromley, N. H., Brook, P. J., Bussey, A. T., Doyle, D. H., Saxon, L. E., Sinclair, E., Strickland, M. L., Utley, R., Waugh, of Physics, A. S. Wilson D. e. p. t., Astronomy, University of, Glasgow, Glasgow G12, 8qq, U. K. o. A., Dannemann20, U., Holm, D., Horstmann, R., Sinkus21, K., Wick Hamburg University, Physics, I. Institute of E. x. p., D., 22761 Hamburg, Germany c. B. D., Burow22, L., Hagge16, E., Lohrmann, G., Poelz, W., Schott, F., Zetsche Hamburg University, Physics, I. I. Institute of E. x. p., Germany c. T. C., Bacon, N., Bru¨ mmer, I., Butterworth, V. L., Harri, G., Howell, B. H. Y., Hung, L., Lamberti23, K. R., Long, D. B., Miller, N., Pavel, A., Prinias24, J. K., Sedgbeer, D., Sideri, A. F., Whitfield Imperial College London, High Energy Nuclear Physics, Group, London SW7, 2bz, U. K. o. U., Mallik, M. Z., Wang, S. M., Wang, J. T., Wu University of Iowa, Physics, Astronomy, Dept, Iowa, City, Ia, 52242, USA p. P., Cloth, D., Filges Forschungszentrum Ju¨ lich, Institut fu¨ r., Kernphysik, D., 52405 Ju¨ lich, Germany S. H., An, G. H., Cho, B. J., Ko, S. B., Lee, S. W., Nam, H. S., Park, S. K., Park Korea University, Seoul 136, 701, Korea h. S., Kartik, H. J., Kim, R. R., Mcneil, W., Metcalf, V. K., Nadendla Louisiana State University, Baton, Rouge, LA 70803, 4001, USA p. F., Barreiro, J. P., Fernandez, R., Graciani, J. M., Herna´ndez, L., Herva´, L., Labarga, M., Martinez, J., del Peso, J., Puga, J., Terron, Auto´ noma Madrid, J. F. de Troco´ niz U. n. i. v. e. r., Depto de F´ısica Teo´, R´ıca, E., 28049 Madrid, Spain n. F., Corriveau, D. S., Hanna, J., Hartmann, L. W., Hung, J. N., Lim, C. G., Matthews25, W. N., Murray, A., Och, P. M., Patel, M., Riveline, D. G., Stair, M., St Laurent, R., Ullmann, G., Zacek25 McGill University, Montre´al, PQ H3A, 2t8, Canada, A, b. T., Tsurugai Meiji Gakuin University, Faculty of General, Education, Yokohama, 244, Japan V., Bashkirov, B. A., Dolgoshein, A., Stifutkin Moscow Engineering Physics Institute, RU 115 409, Moscow, Russia l. G. L., Bashindzhagyan26, P. F., Ermolov, L. K., Gladilin, Golubkov, Y. u. A., V. D., Kobrin, I. A., Korzhavina, V. A., Kuzmin, Lukina, O. Y. u., A. S., Proskuryakov, A. A., Savin, L. M., Shcheglova, A. N., Solomin, N. P., Zotov Moscow State University, Institute of Nuclear, Physic, RU 119 899, Moscow, Russia m. M., Botje, F., Chlebana, J., Engelen, M., de Kamp, P., Kooijman, A., Kruse, A., van Sighem, H., Tiecke, W., Verkerke, J., Vossebeld, M., Vreeswijk, L., Wigger, E., de Wolf, R., van Woudenberg27 NIKHEF, University of, Amsterdam, NL 1009 DB, Amsterdam, Netherlands i. D., Acosta, B., Bylsma, L. S., Durkin, J., Gilmore, C. M., Ginsburg, C. L., Kim, C., Li, T. Y., Ling, P., Nylander, I. H., Park, T. A., Romanowski28 Ohio State University, Physics, Department, Columbus, OH 43210, 1106, USA p. D. S., Bailey, R. J., Cashmore29, A. M., Cooper Sarkar, R. C. E., Devenish, N., Harnew, M., Lancaster30, L., Lindemann, J. D., Mcfall, C., Nath, V. A., Noyes24, A., Quadt, J. R., Tickner, H., Uijterwaal, R., Walczak, D. S., Water, F. F., Wilson, T., Yip Department of Physic, University of, Oxford, Oxford, U. K. o. A., Bertolin, R., Brugnera, R., Carlin, F., Dal Corso, M., De Giorgi, U., Dosselli, S., Limentani, M., Morandin, M., Posocco, L., Stanco, R., Stroili, C., Voci, F., Zuin Dipartimento di Fisica dell’ Universita, Infn, I., 35131 Padova, Italy f. J., Bulmahn, R. G., Feild31, B. Y., Oh, J. J., Whitmore Pennsylvania State University, University, Park, Pa, 16802, USA q. G., D’Agostini, G., Marini, A., Nigro Dipartimento di Fisica, ’La Sapienza’, U. n. i. v., I., 00185 Rome, Italy f. J. C., Hart, N. A., Mccubbin, T. P., Shah Rutherford Appleton Laboratory, Chilton, Didcot OX11, 0qx, U. K. o. E., Barberi, T., Dubb, C., Heusch, M., Van Hook, W., Lockman, J. T., Rahn, H. F. W., Sadrozinski, A., Seiden, D. C., Williams University of California, Santa, Cruz, Ca, 93106, USA p. J., Biltzinger, R. J., Seifert, O., Schwarzer, A. H., Walenta Fachbereich Physik der Universita¨t Gesamthochschule Siegen, D., 57012 Siegen, Germany c. H., Abramowicz, G., Briskin, S., Dagan32, T., Doeker32, A., Levy26 Raymond, Beverly Sackler Faculty of Exact, Science, School of, Physic, Tel Aviv, University, Tel Aviv, 69978, Israel e. J. I., Fleck33, M., Inuzuka, T., Ishii, M., Kuze, S., Mine, M., Nakao, I., Suzuki, K., Tokushuku, K., Umemori, S., Yamada, Y., Yamazaki Institute for Nuclear Study, University of, Tokyo, Tokyo, 113, Japan g. M., Chiba, R., Hamatsu, T., Hirose, K., Homma, S., Kitamura34, T., Matsushita, K., Yamauchi Tokyo Metropolitan University, Tokyo 192, 03, Japan g. R., Cirio, M., Costa, M. I., Ferrero, S., Maselli, C., Peroni, R., Sacchi, A., Solano, A., Staiano Universita di Torino, Dipartimento di Fisica, Sperimentale, I., 10129 Torino, Italy f. M., Dardo II Faculty of Science, Torino, University, Infn, Alessandria, Italy f. D. C., Bailey, F., Benard, M., Brkic, C. P., Fagerstroem, G. F., Hartner, K. K., Joo, G. M., Levman, J. F., Martin, R. S., Orr, S., Polenz, C. R., Sampson, D., Simmon, R. J., Teuscher University of Toronto, Toronto, ON M5S, 1a7, Canada a. J. M., Butterworth, C. D., Catterall, T. W., Jone, P. B., Kaziewicz, J. B., Lane, R. L., Saunder, J., Shulman, M. R., Sutton University College London, London WC1E, 6bt, U. K. o. B., Lu, L. W., Mo Virginia Polytechnic Inst, State, University, Physics, Dept, Blacksburg, Va, 24061, USA q. W., Bogusz, J., Ciborowski, J., Gajewski, G., Grzelak35, M., Kasprzak, M., Krzyz˙anowski, K., Muchorowski36, R. J., Nowak, J. M., Pawlak, T., Tymieniecka, A. K., Wro´ blewski, J. A., Zakrzewski, A. F., Z˙ arnecki Warsaw University, Institute of Experimental, Physic, PL 00681, Warsaw, Poland j. M., Adamus Institute for Nuclear Studie, Poland j. C., Coldewey, Y., Eisenberg32, D., Hochman, U., Karshon32, D., Revel32, D., Zer Zion Weizmann Institute, Nuclear Physics, Dept, Rehovot, 76100, Israel d. W. F., Badgett, J., Breitweg, D., Chapin, R., Cro, S., Dasu, C., Fouda, R. J., Lovele, S., Mattingly, D. D., Reeder, S., Silverstein, W. H., Smith, A., Vaiciuli, M., Wodarczyk University of Wisconsin, Madison, Wi, 53706, USA p. S., Bhadra, M. L., Cardy37, W. R., Frisken, M., Khakzad, W. B., Schmidke York University, North, York, Toronto ON M3J, 1p3, and Canada, A.
Subjects: Physics::Instrumentation and Detectors, Nuclear Theory, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: Cross sections of D* and J/Psi inelastic photoproduction were measured by the ZEUS detector at HERA collider. Comparisons of the data with calculations in NLO pQCD and SHA QCD approaches were made.
Published: 1997

19. A new on-belt elemental analyzer for the cement industry

Author: J. R. Tickner, B. D. Sowerby, C. Manias, D. Retallack, and C. S. Lim
Subjects: Cement, Spectrum analyzer, Materials science, Calibration, Neutron source, Mineralogy, Gamma spectroscopy, Neutron, Neutron activation analysis, Water content
Abstract: On-line control of raw mill feed composition is a key to the improved control of cement plants. Elements of primary importance to the industry are calcium, silicon, aluminum and iron. Direct on-conveyor belt analysis of raw mill feed is required, independent of changes in belt loading, moisture content, and both horizontal and vertical segregation. A new and improved on-conveyor belt elemental analyzer for cement raw mill feed has been developed and tested successfully in Adelaide Brighton’s Birkenhead cement plant. The analyzer utilizes two 241Am-Be neutron sources and multiple BGO detectors to measure both neutron inelastic scatter and thermal neutron capture gamma rays. Dynamic tests in the plant on highly segregated material having depths in the range 100 to 200 mm have shown analyzer total RMS errors of 0.49, 0.52, 0.38 and 0.23 wt.% (on a loss free basis) for CaO, SiO2, Al2O3, and Fe2O3 respectively, when 10-minute counting periods are used.
Published: 2001

20. ZEUS results on the measurement and phenomenology of F-2 at low x and low Q(2)

Author: T. Massam, C. Youngman, P. Göttlicher, B. Löhr, H. Schnurbusch, J. F. Martin, Y. Eisenberg, R. Walczak, K. Heinloth, A. Eskreys, D. Kçira, K. Desler, M. Milite, B. Foster, J. Y. Kim, Pietro Antonioli, Neville Harnew, Giuseppe Barbagli, H. Wieber, Ian Brock, D.C. Williams, DG Roff, Guenter Wolf, Y. Zamora Garcia, M.A.J. Botje, R. Wichmann, E. Strickland, A. Prinias, Andrea Contin, Elisabetta Gallo, W. Koch, Marcella Capua, G. Sartorelli, C. A. Heusch, N. Cartiglia, T.P. Shah, Mark Sutton, S. M. Wang, D. H. Saxon, A. Nigro, Ricardo Graciani, H.-P. Jakob, R. L. Saunders, T. Fusayasu, K. Homma, Ada Solano, S. K. Park, J. Roldán, D. Sideris, M. Kuze, E. Lohrmann, F. Palmonari, L.K. Gladilin, G. Howell, C. L. Kim, H. Beier, Tadeusz Kowalski, G. Poelz, R. Brugnera, V. A. Kuzmin, D. C. Bailey, D. B. Miller, R. Yoshida, A. Bornheim, M. Inuzuka, Ulf Behrens, Federico Cindolo, S. Limentani, A. M. Czermak, Lothar At Bauerdick, Jens Hartmann, S. Wölfle, Amedeo Staiano, U. F. Katz, T. Yamashita, H. Kowalski, O. Ruske, M. Basile, F. Anselmo, H.E. Blaikley, J. T. Rahn, M. Pfeiffer, Dong-Chul Son, T. Wildschek, Gm Levman, P.F. Ermolov, Sergei Chekanov, Jan Figiel, S. Sampson, V. W. Hughes, T. Nishimura, U. Karshon, G. D'Agostini, WN Cottingham, V.A. Noyes, S. J. Hong, D. S. Waters, E. A. Heaphy, J. M. Pawlak, Marco Schioppa, N.C. Brummer, P. G. Pelfer, T. Ishii, I. T. Lim, A. D. Burow, J.T. Wu, D.D. Reeder, Detlef Filges, N. Pavel, Tobias M. Haas, Miriam Lucio Martinez, S. B. Lee, A. Seiden, M. Eckert, N.A. Korotkova, L. Bellagamba, M. Khakzad, J. K. Bienlein, Luis Hervas, D. Boscherini, Shoichi Yamada, R.C.E. Devenish, G. Susinno, J. M. Hernandez, G. Castellini, A. M. Cooper-Sarkar, S. Dagan, T. Y. Ling, L. Lindemann, Giovanni Abbiendi, Robert Klanner, A. Vaiciulis, Andreas Weber, M. B. Przybycień, P.M. Kooijman, Katsuya Yamauchi, Yu. A. Golubkov, S. Mattingly, S. A. Zotkin, A. Garfagnini, D. Westphal, Inkyu Park, Leszek Adamczyk, J.H. Vossebeld, Costas Foudas, M. Raso, G. Laurenti, A. T. Doyle, Wouter Verkerke, D. Mikunas, Stefan Stonjek, R. S. Orr, Richard Hall-Wilton, P. B. Straub, I. Suzuki, Kenneth Long, P. Cloth, Ta Romanowski, M. Wodarczyk, Francois Corriveau, Alexander Kappes, S. W. Lee, Florian Goebel, Joanne Cole, Juan Terron, B. A. Dolgoshein, A. Caldwell, E. Rulikowska-Zarȩbska, Silvia Maselli, R. Pawlak, Hao Zhang, Marta Ruspa, Mariusz Przybycien, M. Corradi, B. Smalska, S. Magill, S. Nam, A. Kotański, M.I. Ferrero, M. St-Laurent, G. Bari, H. F.W. Sadrozinski, F. J. Sciulli, Olga Lukina, Q. Zhu, D. Epperson, M. Posocco, L. Iannotti, Roberto Sacchi, L. M. Shcheglova, Jose Repond, C.H. Bokel, A. Pesci, J. D. McFall, T. Trefzger, J.R. Okrasiński, H.J. Grabosch, I. Gialas, K. Coböken, M. E. Hayes, R. Waugh, N. H. Brook, J. Scott, Rosario Nania, M. Grothe, Aharon Levy, C. Voci, Jonathan Butterworth, Matthias Kasemann, S. Bhadra, J.K. Edmonds, A.I. van Sighem, B. Surrow, G. Briskin, S. Polenz, James Crittenden, N. A. McCubbin, F. Zetsche, W. B. Schmidke, B. Mellado, D. Krakauer, W. H. Smith, L. Lamberti, L. Cifarelli, Giuseppe Iacobucci, Laurel E. Sinclair, G.J. McCance, H. Salehi, D. Notz, C. M. Ginsburg, U. Fricke, K. Klimek, Matthew Wing, K. Wick, L. Heinz, H.G.J.M. Tiecke, P. Giusti, Katsuo Tokushuku, S. Eisenhardt, Lucia Votano, C. Nath, P. Borzemski, T. W. Jones, G. L. Bashindzhagyan, R. Cross, J. Gilmore, Giuseppe Levi, G. Drews, W. N. Murray, J. Große-Knetter, J. A. Parsons, Mário Costa, W. Hain, R. J. Tapper, Umberto Dosselli, A.S. Proskuryakov, Janusz Chwastowski, A. Sabetfakhri, R. Kerger, K. Jelen, Claudia Glasman, J. P. Fernandez, Antonino Zichichi, S. K. Dhawan, E. A. De Wolf, J. R. Tickner, A. Ochs, I. Bohnet, R. Stanek, O. Schwarzer, Helen F Heath, Wr Frisken, I. A. Korzhavina, Roberto Carlin, M. Riveline, J.B. Lane, J. A. Zakrzewski, Tomohiro Abe, Luca Stanco, Lev Khein, Ben Bylsma, A. Bruni, J. Milewski, M. Bukowy, U. Wollmer, Yasunori Yamazaki, D. Simmons, N. Tuning, Jongmin Lee, J.J. Ryan, U. Schneekloth, I. O. Skillicorn, S. Kananov, J. K. Sedgbeer, H. Hartmann, John Hart, D. Chapin, D. Hasell, I. Butterworth, U. Holm, Ignacio Redondo, N. Macdonald, P. Nylander, Y. Iga, M. Y. Pac, G. Bruni, K. Hebbel, J.J. Engelen, P. Markun, Z. Jing, B. Bednarek, T. Koop, Enrico Tassi, J. J. Whitmore, A. Meyer-Larsen, G. F. Hartner, Cd Catterall, S. Ritz, D. S. Bailey, Halina Abramowicz, M. C. Petrucci, S. Kitamura, Abhay Deshpande, D. S. Hanna, L. Suszycki, Giovanni Maccarrone, D. Hochman, Anselmo Margotti, T. Tsurugai, T. Monteiro, S. Schlenstedt, P. J. Bussey, Vladimir Bashkirov, A. Bertolin, Rodney Walker, L.W. Wiggers, Z. Duliński, Krzysztof Piotrzkowski, G. Grzelak, W. Liu, T. C. Bacon, F. Selonke, S. De Pasquale, E. Hilger, R. Galea, J. F. de Trocóniz, F. Pelucchi, L. Zawiejski, B.Y. Oh, Roberto Cirio, C. Amelung, Cristiana Peroni, R. J. Cashmore, Luis Labarga, M. Rohde, M. Derrick, G. García, T. Tymieniecka, U. Kötz, P.R.B. Saull, B. Musgrave, N. Gendner, O. Deppe, J. Breitweg, E. Paul, R. J. Nowak, A. Stifutkin, A. F. Barnecki, M.C.K. Mattingly, L. S. Durkin, J. Ciborowski, R. Hamatsu, J. Puga, Els Koffeman, M. Dardo, K. Nagano, F. Dal Corso, R. Deffner, C. Coldewey, H. Raach, M. Adamus, G. Marini, Wolfram Dietrich Zeuner, A.K. Wróblewski, A. Bamberger, W.F. Badgett, A. Polini, R. L. Talaga, Anna Mastroberardino, A. Quadt, Michele Arneodo, A. A. Savin, O. Barret, C.-P. Fagerstroem, A. N. Solomin, U. Mallik, Kurtis F Johnson, Greg P Heath, N. Coppola, M. Sievers, A. Meyer, K. Umemori, W. S. Toothacker, D Piccioni, J. Del Peso, Tachishige Hirose, Fernando Barreiro, Mauro Morandin, T. Matsushita, H. Lim, R. Stroili, G. Cara Romeo, J.T. Bromley, Antonio Pellegrino, D. Acosta, Dg Stairs, Vincenzo Monaco, J. Zajac, and Danuta Kisielewska
Subjects: Physics, Particle physics, QUANTUM CHROMODYNAMICS, Physics and Astronomy (miscellaneous), STRUCTURE-FUNCTION F-2(X, 010308 nuclear & particles physics, Q(2)), PROTON STRUCTURE FUNCTIONS, MUON SCATTERING, FOS: Physical sciences, ZEUS, 01 natural sciences, High Energy Physics - Experiment, CROSS-SECTIONS, Phenomenology (philosophy), High Energy Physics - Experiment (hep-ex), DEUTERON STRUCTURE FUNCTIONS, PARTON DISTRIBUTIONS, 0103 physical sciences, HIGH-ENERGY COLLISIONS, PERTURBATION-THEORY, 010306 general physics, Engineering (miscellaneous), Cursive
Abstract: Measurements of the proton structure function $F_2$ for $0.6 < Q^2 < 17 {GeV}^2$ and $1.2 \times 10^{-5} < x, 36 pages including 12 figures
Published: 1999

21. Observation of isolated high-E-T photons in photoproduction at HERA

Author: M. Zachara, R.C.E. Devenish, Q. Zhu, H.-P. Jakob, R. L. Saunders, Danuta Kisielewska, T. Massam, G. Laurenti, B. Mellado, K. Umemori, R. Brugnera, V. A. Kuzmin, D. C. Bailey, M. Kuze, N. Pavel, P.M. Kooijman, M. St-Laurent, D.C. Williams, C. Youngman, A. H. Walenta, Ta Romanowski, F. Dal Corso, M.E. Hayes, L. Iannotti, Antonino Zichichi, R. Loveless, C. Coldewey, J. Shulman, T. Fusayasu, Juan Terron, M. Kasprzak, C.R. Sampson, Jeffrey T. Rahn, Marcel Vreeswijk, R. Ullmann, V.A. Noyes, O. Schwarzer, Helen F Heath, D.D. Reeder, J. Del Peso, C. Rembser, N. A. McCubbin, P. Giusti, Gm Levman, Marco Schioppa, S. Magill, N.C. Brummer, P. G. Pelfer, S.H. An, G. Drews, W.F. Badgett, A.S. Proskuryakov, J. Hartmann, C. Voci, M. Wodarczyk, D. S. Waters, K. Homma, Cristiana Peroni, R. J. Cashmore, K. Yamauchi, M. Y. Pac, W. Hain, C. M. Ginsburg, A. Meyer-Larsen, U. Wollmer, J.J. Ryan, Richard Hall-Wilton, M. Derrick, T. Tymieniecka, S. Ritz, M. Roco, M.A.J. Botje, N. Cartiglia, J. Stamm, B. Foster, U. Kötz, Jonathan Butterworth, S. Yamada, M. C. Petrucci, A. Pesci, H. Kowalski, U. Fricke, S. Mattingly, A. Caldwell, A. Bertolin, Silvia Maselli, N. Gendner, D. Simmons, M. L. Utley, H. Zhang, J. F. Martin, A. Nigro, Fernando Barreiro, Mauro Morandin, Z. Jakubowski, R. S. Orr, F. Palmonari, S. Wölfle, Amedeo Staiano, U. F. Katz, O. Ruske, M. Pfeiffer, M. Brkic, Yuji Yamazaki, D. Horstmann, N. H. Brook, V. L. Harris, Rosario Nania, Sung Keun Park, John Hart, T. Tsurugai, J.T. Bromley, J. Breitweg, F. Ricci, R. J. Nowak, H. F.W. Sadrozinski, Giuseppe Levi, H. Park, Kenneth Long, J. Y. Kim, G. Bari, D. Filges, C. L. Kim, A.F. Whitfield, D. Hasell, G. D'Agostini, R. Kerger, K. Jelen, Matthias Kasemann, A. Prinias, J. F. de Trocóniz, L. Zawiejski, Roberto Cirio, Elisabetta Gallo, A. Bruni, L.K. Gladilin, S. W. Nam, W.R. Frisken, R. Pawlak, F. Selonke, Pietro Antonioli, Luisa Cifarelli, Neville Harnew, E. Hilger, J. Repond, P.B. Straub, D. Piccioni, W. Koch, D.S. Hanna, J.J. Engelen, T. Y. Ling, P. B. Kaziewicz, L. Lamberti, T. Yamashita, M. Löwe, Thomas Trefzger, F. Pelucchi, B. Bednarek, L. Lindemann, K.F. Johnson, S. Sampson, J. A. Zakrzewski, Y. Zamora Garcia, H. Beier, Tadeusz Kowalski, M. Nakao, Robert Klanner, A. Vaiciulis, D.G. Roff, H. Salehi, D. Notz, M. Rohde, D. Sideris, T. W. Jones, D. Revel, Michele Arneodo, Ulf Behrens, Federico Cindolo, B.Y. Oh, H. Uijterwaal, U. Schneekloth, D. Acosta, T. Voß, I. Butterworth, I. Suzuki, G. Poelz, F. Zetsche, K. Coböken, D. B. Miller, L.W. Hung, G. L. Bashindzhagyan, W.B. Schmidke, R. J. Teuscher, M. Lancaster, Anselmo Margotti, Enrico Tassi, J. J. Whitmore, R. Waugh, R. Cross, L.W. Wiggers, C. Amelung, Miriam Lucio Martinez, J. Gilmore, S. B. Lee, Y. Iga, A. M. Cooper-Sarkar, S. Dagan, J. Bulmahn, C. A. Heusch, J.T. Wu, A. Ochs, Mariusz Przybycien, M. Corradi, Vincenzo Monaco, L. Suszycki, M. Khakzad, James Crittenden, Andrea Contin, Katsuo Tokushuku, S. Polenz, G. Cases, M. Basile, A. Pellegrino, T. Haas, Giancarlo Susinno, Yu. A. Golubkov, F. Anselmo, M. Inuzuka, C.H. Bokel, Lucia Votano, C. Nath, C.-P. Fagerstroem, R. Yoshida, B.D. Burow, Costas Foudas, L.W. Mo, B. Surrow, Umberto Dosselli, Jongmin Lee, M.C.K. Mattingly, E. Lohrmann, L. S. Durkin, I. Gialas, B. H. Y. Hung, H.J. Grabosch, Luca Stanco, Lev Khein, A. N. Solomin, T. Ishii, B. Musgrave, U. Mallik, J.I. Fleck, J. Zaja̧c, J. M. Pawlak, R. Hamatsu, Janusz Chwastowski, J. Puga, D.G. Stairs, J.D. McFall, T. Monteiro, M. Posocco, O. Deppe, H.E. Blaikley, Y. Eisenberg, L. M. Shcheglova, D.J. Gilkinson, Guillaume Garcia, R. Walczak, S. Kananov, J. P. Fernandez, J. K. Sedgbeer, E. Paul, A. Garfagnini, P.F. Ermolov, K. Nagano, R. Deffner, G. Bruni, K. Muchorowski, E. A. De Wolf, M. Grothe, J. R. Tickner, K. Heinloth, L. Heinz, J. M. Hernandez, J. K. Bienlein, Giuseppe Barbagli, H. Wieber, J. Roldán, M. Adamus, G. Briskin, Leszek Adamczyk, I. A. Korzhavina, G. Marini, R. Wedemeyer, W.N. Cottingham, Wolfram Dietrich Zeuner, A.K. Wróblewski, A. Bamberger, A. Stifutkin, G.P. Heath, Marcella Capua, Giuseppe Iacobucci, D. Westphal, J. Labs, B. Lu, G. Sartorelli, R. Stanek, S.A. Zotkin, N. Tuning, I.H. Park, M.I. Ferrero, M. Przybycien, J. Große-Knetter, U. Karshon, A.A. Savin, D.S. Bailey, D. Mikunas, P. Nylander, K. K. Joo, Luis Hervas, R. G. Feild, J. Ciborowski, D. Boscherini, A.F. Żarnecki, K. Desler, D. Krakauer, I. Bohnet, Tomohiro Abe, G. Castellini, W.N. Murray, Z. Jing, J.S.T. Ng, Vladimir Bashkirov, A. Quadt, P. Cloth, O. Mańczak, P. Markun, D. Kçira, G. F. Hartner, Ben Bylsma, J. Milewski, M. Bukowy, F. Corriveau, G. Grzelak, M. Eckert, N.A. Korotkova, L. Bellagamba, H. Hartmann, T. C. Bacon, M. Dardo, P. Borzemski, W. Liu, S. De Pasquale, A.S. Wilson, Sridhara Dasu, Ian Brock, R. Ayad, O. Yu. Lukina, S Campbell-Robson, Halina Abramowicz, W. Schott, Cd Catterall, A. Polini, Z. Duliński, R.L. Talaga, J.A. Parsons, D. Epperson, J.K. Edmonds, A.I. van Sighem, K. Wick, G. Abbiendi, G. Cara Romeo, M. Riveline, S. Eisenhardt, F. Sciulli, J.N. Lim, G. Howell, R.J. Tapper, A. Meyer, H.G.J.M. Tiecke, E. Strickland, Giovanni Maccarrone, D. Hochman, S. Schlenstedt, P. J. Bussey, E. Rulikowska-Zarȩbska, Joanne Cole, T.P. Shah, Mark Sutton, S. M. Wang, D. H. Saxon, C. Glasman, A. Bornheim, Tachishige Hirose, P. Göttlicher, Roberto Carlin, D. Chapin, J.B. Lane, Gy. Wolf, Roberto Sacchi, T. Matsushita, R. Stroili, Aharon Levy, Laurel E. Sinclair, A. Seiden, J.H. Vossebeld, M. Raso, A. Eskreys, A. T. Doyle, L. Labarga, Wouter Verkerke, B. A. Dolgoshein, Ada Solano, S. Limentani, I. T. Lim, S. Bhadra, B. Löhr, S. Kitamura, A. Kotański, L.A.T. Bauerdick, J.R. Okrasiński, U. Holm, Krzysztof Piotrzkowski, K. Ohrenberg, W. H. Smith, R. Graciami, Mário Costa, F.S. Chlebana, and Zeus (IHEF, IoP, FNWI)
Subjects: COLLISIONS, Nuclear and High Energy Physics, Particle physics, Photon, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Photon energy, 01 natural sciences, 7. Clean energy, CROSS-SECTIONS, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), GLOBAL QCD, 0103 physical sciences, CALORIMETER, 010306 general physics, Nuclear Experiment, COMPTON-SCATTERING, Quantum chromodynamics, Physics, Jet (fluid), ZEUS (particle detector), CONSTRUCTION, 010308 nuclear & particles physics, Compton scattering, ZEUS, HERA, CENTRAL TRACKING DETECTOR, PARTON DISTRIBUTIONS, Pseudorapidity, High Energy Physics::Experiment, HARD SCATTERING
Abstract: Events containing an isolated prompt photon with high transverse energy, together with a balancing jet, have been observed for the first time in photoproduction at HERA.The data were taken with the ZEUS detector, in a $\gamma p$ centre of mass energy range 120--250 GeV. The fraction of the incoming photon energy participating in the production of the prompt photon and the jet, $x_\gamma$, shows a strong peak near unity, consistent with LO QCD Monte Carlo predictions. In the transverse energy and pseudorapidity range $5\le \eTg < 10$ GeV, $-0.7 \le \eta^\gamma < 0.8$, $\eTj\ge 5$ GeV, and $-1.5\le \eta^{jet}\le 1.8$, with $\xgO > 0.8,$ the measured cross section is $15.3 \pm 3.8 \pm 1.8 pb$, in good agreement with a recent NLO calculation., Comment: 22 pages including 8 figures
Published: 1997

22. Exclusive $\rho^{0}$ production in deep inelastic electron-proton scattering at HERA

Author: K. K. Joo, M. Martinez, J. F. Martin, A. Nigro, T. Yip, O. Mańczak, G. F. Hartner, A.F. Whitfield, S.M. Mari, A. Eskreys, Djp Norman, D. Westphal, Guenter Wolf, A. Bernstein, J. T. Rahn, U. Karshon, Y. Zamora Garcia, T. Voß, M.A.J. Botje, Thomas Trefzger, Luis Hervas, Andrea Contin, A. Kruse, D. Boscherini, G. Susinno, T. Monteiro, Detlef Filges, L. M. Shcheglova, Marcella Capua, G. Castellini, P.M. Kooijman, D. K. Hasell, Antonino Zichichi, F. Palmonari, N. Cartiglia, E. Gallo, A. Prinias, W. Koch, Roberto Sacchi, H.G.J.M. Tiecke, F. Benard, J.S.T. Ng, B. Löhr, P. Joos, J. Stamm, P. Bruni, Costas Foudas, B. Foster, Ta Romanowski, J. Shulman, Claudia Glasman, Giuseppe Iacobucci, Luisa Cifarelli, L. K. Gladilin, Neville Harnew, Amedeo Staiano, Danuta Kisielewska, R. Yoshida, L.W. Mo, R. Stanek, H. Beier, Tadeusz Kowalski, Juan Terron, M. Kasprzak, M. Pfeiffer, T. Massam, C. Youngman, Aharon Levy, T.J. Llewellyn, J. N. Lim, S. Dagan, R. Graciani, E. Badura, R. S. Orr, K. Honscheid, Yu. A. Golubkov, C. P. Fagerstroem, G. Poelz, Lutz Feld, R. Sinkus, Cristiana Peroni, R. J. Cashmore, Luis Labarga, Luca Stanco, E. Rulikowska-Zarȩbska, S. Mine, B. Lu, Ada Solano, Cg Matthews, A. Caldwell, G. Cases, H.-P. Jakob, Lothar At Bauerdick, F. F. Wilson, M. Chiarini, Yasunori Yamazaki, J. M. Pawlak, P. B. Straub, Kenneth Long, R. L. Saunders, M. Derrick, T. Tymieniecka, J. K. Sedgbeer, S. Limentani, M. Posocco, Geoffrey Smith, Tobias M. Haas, Jonathan Butterworth, John Hart, B. Behrens, G. Bruni, G. Bari, K.W. McLean, A. Ladage, U. Kötz, J.B. Lane, S. Söldner-Rembold, Jens Hartmann, R. Loveless, R. Brugnera, S. W. Nam, Shoichi Yamada, R.C.E. Devenish, F. J. Sciulli, Simon George, A. Frey, D. Krakauer, V. A. Kuzmin, D. C. Bailey, A. Bertolin, M. Van Hook, B. Bednarek, Rr Rau, O. Yu. Lukina, V. K. Nadendla, L. Köpke, J.A. O'Mara, M. Geerts, K. Blankenship, M. L. Utley, J.J. Engelen, M. Eckert, L. Bellagamba, A. Garfagnini, R. R. McNeil, G. Laurenti, S. Nickel, R. J. Nowak, F. Zetsche, C.R. Sampson, K. Muchorowski, Tachishige Hirose, M. De Giorgi, D. B. Miller, J. Gajewski, T.P. Shah, S. M. Wang, P. M. Patel, Lucia Votano, S. Ritz, D. S. Hanna, Y. Nagasawa, C. Nath, H. Heßling, J. F. de Trocóniz, Anselmo Margotti, D. J. Gilkinson, L. Zawiejski, D. H. Saxon, A. Freidhof, M. Khakzad, Roberto Cirio, K.F. Johnson, P. Giusti, L.W. Wiggers, L. Iannotti, J. K. Bienlein, F. Selonke, E. Hilger, V.A. Noyes, M. Basile, R. Wedemeyer, Giuseppe Levi, J. A. Zakrzewski, Douglas Gingrich, Gm Levman, D. S. Waters, V. D. Kobrin, T. Dubbs, J. Biltzinger, Ulf Behrens, Federico Cindolo, W. Bogusz, H. Kowalski, G. Zacek, S. Kartik, G. Drews, J. A. Parsons, W. Hain, M. Krzyżanowski, C. Fordham, M. Kuze, Y. Nakamitsu, Rosario Nania, Sung Keun Park, Katsuo Tokushuku, Masashi Hazumi, C. Rembser, N. A. McCubbin, S. Polenz, S. Mengel, Francois Corriveau, J. Mainusch, E. McCliment, W. Metcalf, K. Jelen, M. Rohde, K. Wick, K. Yamauchi, B. Musgrave, M. Zachara, M. St.Laurent, U. Holm, J. M. Hernandez, G.P. Heath, K. Charchuła, B.Y. Oh, A. Bruni, Umberto Dosselli, Janusz Chwastowski, A. Kotański, M. Brkic, A. Dannemann, A. Seiden, N. Wulff, M. Przybycień, A.H. Walenta, Masami Chiba, Klaus Kurt Desch, G. D'Agostini, E. Paul, Avto Kharchilava, C. Li, Christian Nemoz, W. Schott, J. Roldán, James Crittenden, N. Dyce, E. A. De Wolf, J. R. Tickner, Cd Catterall, T. Ishii, B. D. Burow, T. Y. Ling, A. T. Doyle, L. Wai, L. Lindemann, Wouter Verkerke, A. Stifutkin, E. Barberis, G. Zech, P. Morawitz, N. Pavel, I. Suzuki, B. A. Dolgoshein, R. Stroili, Giovanni Abbiendi, A.S. Proskuryakov, Robert Klanner, Lars Hagge, W.N. Murray, G. Anzivino, M. Lancaster, A. Vaiciulis, C. Voci, R. van Woudenberg, M. Löwe, J.T. Wu, J. Bulmahn, A. N. Solomin, B. Surrow, S. Bhadra, T.L. Short, Efstathios Stiliaris, M. Nakao, P. Borzemski, U. Mallik, J. P. Fernandez, D. C. Williams, Aleksander Filip Żarnecki, Silvia Maselli, Y. Eisenberg, William S. Lockman, J. Ciborowski, R. Ullmann, M.C.K. Mattingly, L. S. Durkin, T. Doeker, A.S. Wilson, S.H. An, M. Grothe, B. Gutjahr, R.J. Tapper, M. de Kamps, W. B. Schmidke, K. Heinloth, R. Hamatsu, Giuseppe Barbagli, I. Ali, V.A. Kurzhavina, D.D. Reeder, B. Diekmann, M. Wodarczyk, M. Dardo, C. Coldewey, J. Puga, H. J. Kim, A. Cassidy, Giovanni Maccarrone, D. Horstmann, R. Timellini, A. Dake, N. H. Brook, J. Große-Knetter, D. S. Bailey, V. L. Harris, M. Nakahata, M. Veeswijk, M. Adamus, O. Schwarzer, Helen F Heath, Wr Frisken, I. A. Korzhavina, I. Butterworth, Roman Walczak, D. Lüke, Y. Iga, A. Polini, G. Marini, S. Schlenstedt, P. J. Bussey, Fernando Barreiro, D. Acosta, Dg Stairs, T. Tsurugai, G. Sartorelli, Np Zotov, Wolfram Dietrich Zeuner, A.K. Wróblewski, A. Bamberger, Krzysztof Piotrzkowski, M. H. Suh, Mauro Morandin, U. Schneekloth, Marco Schioppa, J. J. Whitmore, P. G. Pelfer, J.I. Fleck, T. Neumann, D. Schramm, C. A. Heusch, Mariusz Flasiński, L. W. Hung, S. Kitamura, A. Byrne, R. Seidlein, K. Prytz, P. B. Kaziewicz, M. Corradi, S. Yang, L. Lamberti, D. Mikunas, J. Zaja̧c, A. Bargende, E. Tassi, R. Ayad, M. Roco, H. Uijterwaal, G. Cara Romeo, R.S. Gilmore, H.J. Grabosch, U. F. Katz, J. F. Labs, M. L. Cardy, J.F. Zhou, E. Lohrmann, O. Deppe, B. Y. H. Hung, D. Revel, A. Meyer, Roberto Carlin, S.S. Wilson, K.M. Furutani, W. Schulz, J. Del Peso, L.E. Sinclair, K. Homma, G. Briskin, Q. Zhu, Vladimir Bashkirov, Jose Repond, K. Ohrenberg, N. Bruemmer, Meng Wang, G. Grzelak, W. H. Smith, T. C. Bacon, Mário Costa, S. De Pasquale, F.S. Chlebana, I. Gialas, J. Schroeder, Leszek Adamczyk, M.I. Ferrero, R. G. Feild, Matthias Kasemann, P. Göttlicher, D. Notz, K. Desler, S. H. Yon, T. W. Jones, Anna Goussiou, G. L. Bashindzhagyan, R. J. Teuscher, Hartmut Sadrozinski, I. H. Park, Ben Bylsma, Hao Zhang, J. Milewski, H. Hartmann, Sridhara Dasu, S. Eisenhardt, S Campbell-Robson, Halina Abramowicz, J.D. McFall, P.F. Ermolov, D. Zer-Zion, P. Cloth, R. Imlay, S. Magill, F. Dal Corso, T. Hasegawa, A. Leich, W.F. Badgett, Debades Bandyopadhyay, S. M. Hong, R. L. Talaga, C.J.S. Morgado, Michele Arneodo, A. A. Savin, L. Suszycki, Samuel Silverstein, Amanda Cooper-Sarkar, R. J. Seifert, A. Quadt, J. Mollen, and Zeus (IHEF, IoP, FNWI)
Subjects: Nuclear and High Energy Physics, Particle physics, Meson, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, Pomeron, Cross section (physics), 0103 physical sciences, photoproduction, cross section measurement, 010306 general physics, DETECTOR, Physics, Quantum chromodynamics, Research Groups and Centres\Physics\Low Temperature Physics, 010308 nuclear & particles physics, Scattering, Faculty of Science\Physics, Perturbative QCD, ELECTROPRODUCTION, ZEUS, HERA, QCD, Gluon, High Energy Physics::Experiment
Abstract: The exclusive production of $\rho^0$ mesons in deep inelastic electron-proton scattering has been studied using the ZEUS detector. Cross sections have been measured in the range $7 < Q^2 < 25$ GeV$^2$ for $\gamma^*p$ centre of mass (c.m.) energies from 40 to 130 GeV. The $\gamma^*p \to \rho^0 p$ cross section exhibits a $Q^{-(4.2 \pm 0.8 ^{+1.4}_{-0.5})}$ dependence and both longitudinally and transversely polarised $\rho^0$'s are observed. The $\gamma^*p \to \rho^0 p$ cross section rises strongly with increasing c.m. energy, when compared with NMC data at lower energy, which cannot be explained by production through soft pomeron exchange. The data are compared with perturbative QCD calculations where the rise in the cross section reflects the increase in the gluon density at low $x$. the gluon density at low $x$., Comment: 22 pages, latex, 4 figures appended
Published: 1995

23. D* production in deep inelastic scattering at HERA

Author: J.N. Lim, G. Howell, D. Sideris, L.K. Gladilin, G. Castellini, P. Borzemski, Rosario Nania, Sung Keun Park, F. Dal Corso, A.S. Wilson, W. Verkerke, L. Cifarelli, E. Rulikowska-Zarȩbska, D. B. Miller, H.-P. Jakob, R. L. Saunders, Tachishige Hirose, C. Glasman, M. Kuze, L. Lamberti, M. Basile, W.F. Badgett, A. Pellegrino, T. Haas, F. Anselmo, T. Dubbs, C. Rembser, Katsuo Tokushuku, Umberto Dosselli, K. Ohrenberg, T. Yamashita, H. Zhang, S. Dagan, R. Brugnera, V. A. Kuzmin, M. Khakzad, D. C. Bailey, M. Nakao, C. Youngman, Janusz Chwastowski, M. Inuzuka, N. A. McCubbin, J. F. Martin, A. Nigro, W. H. Smith, Yu. A. Golubkov, A. Bornheim, T. Matsushita, P. Giusti, Roberto Sacchi, S. Yamada, G.P. Heath, Gm Levman, D. S. Waters, R. Stroili, E. A. De Wolf, G. Drews, W. Hain, Y. Zamora Garcia, J. Bulmahn, T. Voß, M. Posocco, C. L. Kim, D.S. Bailey, B. Löhr, A.S. Proskuryakov, K. Yamauchi, H. Kowalski, J. R. Tickner, M. Lancaster, J.T. Wu, Danuta Kisielewska, T. Massam, A. Ochs, Aharon Levy, F.S. Chlebana, Peter Bussey, A.F. Whitfield, S. Mattingly, P. Cloth, M. Eckert, N.A. Korotkova, L. Bellagamba, S. Nam, Cristiana Peroni, R. J. Cashmore, A. Zichichi, Matthias Kasemann, R. Yoshida, R. Ayad, N. Pavel, B.D. Burow, D.G. Roff, R. Pawlak, J.I. Fleck, Michele Arneodo, P. Nylander, K. K. Joo, J.A. Parsons, H. Salehi, W.N. Cottingham, J. Zaja̧c, J. Hartmann, D. Notz, J. Shulman, Laurel E. Sinclair, B. Lu, G. Cara Romeo, O. Mańczak, P. Markun, M. Derrick, C. Voci, G. F. Hartner, Juan Terron, M. Kasprzak, I. Suzuki, R. Waugh, M. St-Laurent, William S. Lockman, U. Holm, R. Stanek, G. Briskin, P.M. Kooijman, T. W. Jones, J. M. Pawlak, C. M. Ginsburg, L. Suszycki, S. Kitamura, G. L. Bashindzhagyan, W.B. Schmidke, R. J. Teuscher, D.C. Williams, C. Coldewey, A. H. Walenta, T. Tymieniecka, U. Kötz, S. Ritz, A. Garfagnini, A. Caldwell, R. Cross, Z. Duliński, I.H. Park, N. Cartiglia, Giuseppe Levi, J. Gilmore, K. Muchorowski, N. Gendner, D. Kçira, Ian Brock, J.D. McFall, K. Jelen, Ricardo Graciani, J.K. Edmonds, A.I. van Sighem, J.T. Bromley, Krzysztof Piotrzkowski, F. Palmonari, Joanne Cole, P.F. Ermolov, W.R. Frisken, Richard Hall-Wilton, K. Wick, Marco Schioppa, S. Magill, N.C. Brummer, P. G. Pelfer, J. Breitweg, R. Wedemeyer, G. Cases, G. Abbiendi, S. Wölfle, Costas Foudas, L.W. Mo, Amedeo Staiano, Yuji Yamazaki, E. Strickland, Silvia Maselli, R. Loveless, M. Pfeiffer, Amanda Cooper-Sarkar, D. Acosta, M. Riveline, T. Fusayasu, D. Filges, R. J. Nowak, Luca Stanco, Lev Khein, T.P. Shah, Mark Sutton, S. M. Wang, D. H. Saxon, S. Sampson, R. S. Orr, J. Stamm, Vincenzo Monaco, B. Foster, F. Sciulli, A. Quadt, S.A. Zotkin, U. Schneekloth, P. Göttlicher, M.C.K. Mattingly, L. Lindemann, J. A. Zakrzewski, S. Kananov, J. K. Sedgbeer, C.R. Sampson, A. Kotański, G. Bruni, D. Horstmann, N. H. Brook, V. L. Harris, Kenneth Long, J. Labs, I. Butterworth, L. S. Durkin, L.A.T. Bauerdick, Y. Iga, R. Hamatsu, A. Pesci, Roberto Carlin, M. Rohde, J. Y. Kim, R.J. Tapper, Jeffrey T. Rahn, J.R. Okrasiński, Pietro Antonioli, Neville Harnew, G. Bari, J. Repond, O. Ruske, Ben Bylsma, J. Milewski, J. Puga, D.S. Hanna, M. Van Hook, B. Bednarek, H. Hartmann, D. Chapin, Thomas Trefzger, K.F. Johnson, A. Seiden, T. Doeker, Jose M Hernandez, K. Nagano, M. Roco, Giovanni Maccarrone, D. Hochman, R. Deffner, W. Liu, S. Schlenstedt, M. Brkic, M. Adamus, Sridhara Dasu, F. Zetsche, J.H. Vossebeld, M. Raso, A. Eskreys, A. T. Doyle, Ta Romanowski, R. Ullmann, V.A. Noyes, G. Marini, Ada Solano, J. Ciborowski, A. Kruse, Wolfram Dietrich Zeuner, A.K. Wróblewski, A. Bamberger, S Campbell-Robson, Halina Abramowicz, L. Labarga, T. Monteiro, K. Coböken, F. Selonke, B. Surrow, Marcella Capua, S. Limentani, D. Hasell, O. Yu. Lukina, E. Hilger, G. D'Agostini, B. A. Dolgoshein, Jongmin Lee, F. Pelucchi, M. Dardo, I. T. Lim, James Crittenden, S. Bhadra, Jonathan Butterworth, T. Y. Ling, B.Y. Oh, Roman Walczak, A. Polini, U. Fricke, M. Grothe, C. A. Heusch, C. Amelung, S. De Pasquale, L. Heinz, E. Lohrmann, H.E. Blaikley, W. Schott, Cd Catterall, A. Meyer-Larsen, A. Bertolin, J.J. Engelen, Robert Klanner, A. Vaiciulis, Leszek Adamczyk, Anselmo Margotti, L.W. Wiggers, S. Polenz, J. F. de Trocóniz, L. Zawiejski, Roberto Cirio, Y. Eisenberg, D.J. Gilkinson, Guillaume Garcia, D.D. Reeder, J. P. Fernandez, M. Wodarczyk, I. A. Korzhavina, D. Westphal, H. Park, U. Karshon, K. Heinloth, Giuseppe Barbagli, Luis Hervas, J. Roldán, D. Boscherini, P. B. Kaziewicz, W.N. Murray, J.S.T. Ng, H. Uijterwaal, H.G.J.M. Tiecke, G. Sartorelli, M. Przybycien, J.B. Lane, Gy. Wolf, A.A. Savin, A. Contin, L.W. Hung, Lucia Votano, C. Nath, M. Zachara, R.C.E. Devenish, Q. Zhu, G. Laurenti, L. Iannotti, A. Prinias, Elisabetta Gallo, W. Koch, H. Beier, Tadeusz Kowalski, G. Poelz, Lutz Feld, S.H. An, M. Y. Pac, M. C. Petrucci, T. Tsurugai, P.B. Straub, L. M. Shcheglova, Giuseppe Iacobucci, M.A.J. Botje, I. Bohnet, Tomohiro Abe, Z. Jing, Ulf Behrens, Federico Cindolo, Miriam Lucio Martinez, S. B. Lee, T. Ishii, B. Musgrave, D.G. Stairs, K. Desler, Hartmut Sadrozinski, R.L. Talaga, S. Eisenhardt, J.J. Ryan, B. H. Y. Hung, J. K. Bienlein, Mariusz Przybycien, M. Corradi, C.H. Bokel, H.J. Grabosch, O. Deppe, M.E. Hayes, O. Schwarzer, Helen F Heath, U. Wollmer, I. Gialas, Marco Costa, D. Simmons, John Hart, M.I. Ferrero, D. Mikunas, R. G. Feild, D. Krakauer, A. Meyer, K. Umemori, A. Bruni, M. Löwe, Marcel Vreeswijk, Enrico Tassi, J. J. Whitmore, Giancarlo Susinno, Vladimir Bashkirov, F. Corriveau, G. Grzelak, T. C. Bacon, J. Del Peso, K. Homma, E. Barberis, C.-P. Fagerstroem, A. N. Solomin, U. Mallik, A.V. Shumilin, J. Große-Knetter, Fernando Barreiro, Martin Utley, Mauro Morandin, Z. Jakubowski, U. F. Katz, D. Piccioni, A.F. Ż.arnecki, D. Revel, E. Paul, A. Stifutkin, and Zeus (IHEF, IoP, FNWI)
Subjects: COLLISIONS, Nuclear and High Energy Physics, Particle physics, Proton, FOS: Physical sciences, PROTON, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, ZEUS CALORIMETER, High Energy Physics - Experiment (hep-ex), Positron, 0103 physical sciences, Charm (quantum number), QCD ANALYSIS, 010306 general physics, Nuclear Experiment, Physics, Quantum chromodynamics, ZEUS (particle detector), CONSTRUCTION, 010308 nuclear & particles physics, ZEUS, CENTRAL TRACKING DETECTOR, PARTON DISTRIBUTIONS, INTRINSIC CHARM, EP SCATTERING, ELECTROPRODUCTION, Structure function, HERA, Deep inelastic scattering, High Energy Physics::Experiment
Abstract: This paper presents measurements of D^{*\pm} production in deep inelastic scattering from collisions between 27.5 GeV positrons and 820 GeV protons. The data have been taken with the ZEUS detector at HERA. The decay channel $D^{*+}\to (D^0 \to K^- \pi^+) \pi^+ $ (+ c.c.) has been used in the study. The $e^+p$ cross section for inclusive D^{*\pm} production with $5, Comment: 17 pages including 4 figures

24. Measurement of elastic Υ photoproduction at HERA

Author: A. Bruni, F. Selonke, E. Hilger, R. Galea, L. M. Shcheglova, Enrico Tassi, J. J. Whitmore, F. Pelucchi, Michele Arneodo, Giancarlo Susinno, Giuseppe Iacobucci, A. Meyer, K. Umemori, G.J. McCance, P. Borzemski, H. Schnurbusch, B.Y. Oh, R.L. Talaga, S. W. Lee, Rosario Nania, Sung Keun Park, J.T. Wu, R. Loveless, Mariusz Przybycien, M. Corradi, W. S. Toothacker, C.H. Bokel, T. Fusayasu, A. Ochs, H.J. Grabosch, H. Zhang, J. F. Martin, C. Amelung, L. Suszycki, H.-P. Jakob, L. Lamberti, I. Bohnet, Jeffrey T. Rahn, Tomohiro Abe, A. Kotański, Antonino Zichichi, D. Epperson, J.I. Fleck, R. Graciani, L.A.T. Bauerdick, J. Zaja̧c, R. L. Saunders, V.A. Noyes, J. Del Peso, U. Wollmer, Z. Jing, J.R. Okrasiński, I. Gialas, C. A. Heusch, K. Coböken, Y. Zamora Garcia, Katsuo Tokushuku, B. Mellado, D. Simmons, Inkyu Park, Leszek Adamczyk, S. J. Hong, John Hart, N. Pavel, J.J. Ryan, Umberto Dosselli, R. Brugnera, Thomas Trefzger, K.F. Johnson, P. Cloth, S. Eisenhardt, Janusz Chwastowski, J.K. Edmonds, A.I. van Sighem, M. Y. Pac, K. Homma, E. Lohrmann, E. A. De Wolf, J. R. Tickner, Danuta Kisielewska, J. Ciborowski, M.I. Ferrero, Ada Solano, D. Mikunas, M.C.K. Mattingly, L. S. Durkin, R. Hamatsu, J. Puga, Els Koffeman, Lucia Votano, C. Nath, Yuji Yamazaki, V. A. Kuzmin, D. Krakauer, K. Nagano, W. H. Smith, G. Briskin, P.M. Kooijman, T. Massam, M.A.J. Botje, N. Cartiglia, W.N. Cottingham, Mário Costa, James Crittenden, H.G.J.M. Tiecke, S. Limentani, D. C. Bailey, C. Youngman, Dong-Chul Son, K. Wick, G. Abbiendi, R. Stanek, R. Deffner, Juan Terron, Vladimir Bashkirov, G.F. Hartner, M. Riveline, Anna Mastroberardino, I. O. Skillicorn, Fernando Barreiro, Andrea Contin, H.E. Blaikley, L.K. Gladilin, Mauro Morandin, M. Adamus, N. Tuning, M. C. Petrucci, F. Corriveau, R. Yoshida, I. T. Lim, M. Grothe, F. Sciulli, H.F. Heath, L. Heinz, M. Dardo, T. Tsurugai, B.D. Burow, G. Grzelak, G. Marini, S. Bhadra, T. Monteiro, J.A. Parsons, G. Cara Romeo, L. Lindemann, J. A. Zakrzewski, Wolfram Dietrich Zeuner, A.K. Wróblewski, A. Bamberger, A. Quadt, M. E. Hayes, H. Lim, Y. Eisenberg, A. Sabetfakhri, C. Coldewey, Guillaume Garcia, H. Raach, Gm Levman, R. S. Orr, P.B. Straub, N. A. McCubbin, T. C. Bacon, D. S. Waters, U. Holm, R. Walczak, F. Palmonari, K. Heinloth, J. M. Pawlak, Jan Figiel, Marcella Capua, Kenneth Long, G. Bari, J. Repond, K. Desler, A. Polini, S. De Pasquale, S. Wölfle, R.J. Tapper, M. Milite, Giuseppe Barbagli, H. Wieber, J. Roldán, D.S. Hanna, T. Yamashita, M. St-Laurent, F. Dal Corso, H. Kowalski, Cristiana Peroni, R. J. Cashmore, B. Bednarek, Amedeo Staiano, U. F. Katz, A. Garfagnini, R. Wichmann, Abhay Deshpande, A. M. Cooper-Sarkar, S. Dagan, S. Mattingly, D. Piccioni, Matthias Kasemann, D.C. Williams, M. Khakzad, K. Klimek, K. Yamauchi, D.G. Roff, J. K. Bienlein, M. Pfeiffer, Ulf Behrens, Federico Cindolo, M. Derrick, T. Tymieniecka, F. Zetsche, Krzysztof Piotrzkowski, A.S. Proskuryakov, Yu. A. Golubkov, Giovanni Maccarrone, D. Hochman, Ta Romanowski, M. Wing, S. K. Dhawan, D. Filges, S. Schlenstedt, P. J. Bussey, R. Pawlak, W.F. Badgett, U. Kötz, P.R.B. Saull, J.B. Lane, Gy. Wolf, H. Salehi, G. Sartorelli, M. Przybycien, J.T. Bromley, D. Notz, G. Howell, M. Posocco, Joanne Cole, S. B. Lee, N. Gendner, C.-P. Fagerstroem, O. Deppe, J. Breitweg, Marco Schioppa, S. Magill, N.C. Brummer, Richard Hall-Wilton, B. Löhr, S. Stonjek, A.A. Savin, P. G. Pelfer, A. N. Solomin, U. Mallik, Jonathan Butterworth, R. Waugh, Aleksander Filip Żarnecki, Silvia Maselli, M. Inuzuka, S. Yamada, E. Rulikowska-Zarȩbska, S. Kitamura, R. J. Nowak, D. Acosta, T. Ishii, P. Nylander, K. K. Joo, U. Fricke, B. Musgrave, D.S. Bailey, B. Smalska, D.G. Stairs, D.D. Reeder, Roberto Carlin, P. Markun, D. Chapin, Vincenzo Monaco, Giuseppe Levi, N. H. Brook, M. Eckert, N.A. Korotkova, L. Bellagamba, M. Wodarczyk, J. Hartmann, A. Meyer-Larsen, Rodney Walker, O. Schwarzer, Z. Duliński, J.D. McFall, C. Voci, M. Rohde, A. Bertolin, R. Kerger, K. Jelen, O. Ruske, W.R. Frisken, T. W. Jones, G. L. Bashindzhagyan, C. M. Ginsburg, D. Sideris, S. Ritz, Costas Foudas, J. F. de Trocóniz, L. Zawiejski, Roberto Cirio, D. Hasell, G. D'Agostini, Tachishige Hirose, D. B. Miller, S. Sampson, A. Caldwell, R. Cross, T. Y. Ling, U. Schneekloth, W.B. Schmidke, A. Bornheim, M. Basile, J. Gilmore, I. Butterworth, A. Pellegrino, T. Haas, F. Anselmo, Robert Klanner, Y. Iga, V. W. Hughes, Alexander Kappes, A. Vaiciulis, T. Nishimura, Claudia Glasman, A. M. Czermak, E. Paul, J. M. Hernandez, T. Matsushita, G.P. Heath, A. Stifutkin, F. Goebel, H. F.W. Sadrozinski, Luca Stanco, Lev Khein, R. Stroili, N. Coppola, S. Kananov, J. K. Sedgbeer, O. Yu. Lukina, G. Bruni, B. Surrow, A. Nigro, Jongmin Lee, C. L. Kim, B. Foster, P.F. Ermolov, J. Y. Kim, Pietro Antonioli, Luisa Cifarelli, Neville Harnew, K. Hebbel, Cd Catterall, S.A. Zotkin, A. Pesci, Ben Bylsma, J. Milewski, M. Bukowy, H. Hartmann, W. Liu, Sridhara Dasu, S Campbell-Robson, Halina Abramowicz, E. A. Heaphy, A. Seiden, I. Suzuki, J.H. Vossebeld, M. Raso, A. Eskreys, A. T. Doyle, L. Labarga, Wouter Verkerke, B. A. Dolgoshein, Marta Ruspa, D. Kçira, Ian Brock, E. Strickland, T.P. Shah, Mark Sutton, S. M. Wang, D. H. Saxon, D. Westphal, U. Karshon, P. Göttlicher, Luis Hervas, D. Boscherini, M. I. Martínez, Roberto Sacchi, G. Castellini, W.N. Murray, M. Kuze, Aharon Levy, Laurel E. Sinclair, A. Prinias, Elisabetta Gallo, P. Giusti, W. Koch, S. Polenz, H. Beier, G. Drews, J. Große-Knetter, W. Hain, Tadeusz Kowalski, G. Poelz, J. P. Fernandez, I. A. Korzhavina, R.C.E. Devenish, Q. Zhu, S. W. Nam, N. Macdonald, J.J. Engelen, G. Laurenti, Anselmo Margotti, L.W. Wiggers, and L. Iannotti
Subjects: Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Meson production, Meson, 010308 nuclear & particles physics, Branching fraction, Nuclear Theory, Perturbative QCD, Particle accelerator, HERA, 01 natural sciences, law.invention, Nuclear physics, law, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract: The photoproduction reaction γp → μ+ μ-p has been studied in ep interactions using the ZEUS detector at HERA. The data sample corresponds to an integrated luminosity of 43.2pb-1. The Υ meson has been observed in photoproduction for the first time. The sum of the products of the elastic Υ(1S), Υ(2S),Υ(3S) photoproduction cross sections with their respective branching ratios is determined to be 13.3 ± 6.0(stat.)-2.3+2.7(syst.) pb at a mean photon-proton centre of mass energy of 120 GeV. The cross section is above the prediction of a perturbative QCD model. © 1998 Elsevier Science B.V. All rights reserved.

25. Diffractive dijet cross sections in photoproduction at HERA

Author: Ada Solano, L. Lamberti, B. Surrow, Jongmin Lee, S. Limentani, Thomas Trefzger, K.F. Johnson, M. Kuze, S. Polenz, Vladimir Bashkirov, I. T. Lim, S. Bhadra, J. Bulmahn, P. Giusti, K. Hebbel, J. F. Martin, J. P. Fernandez, I. O. Skillicorn, Andrea Contin, A. Nigro, G. Drews, W. N. Murray, J. Große-Knetter, J. A. Parsons, C. L. Kim, W. Schott, Cd Catterall, W. Hain, Y. Zamora Garcia, A. Ochs, I. A. Korzhavina, T. Monteiro, H.-P. Jakob, R. L. Saunders, S. Sampson, R. Cross, G. Grzelak, T. C. Bacon, C.-P. Fagerstroem, A. N. Solomin, A. Prinias, Elisabetta Gallo, Costas Foudas, Marcella Capua, R. S. Orr, P. B. Straub, Kenneth Long, R. Yoshida, B.D. Burow, Francois Corriveau, Hartmut Sadrozinski, W. Koch, H.G.J.M. Tiecke, U. Mallik, Greg P Heath, Marco Schioppa, N.C. Brummer, J. Gilmore, R. Brugnera, F. Palmonari, A. Kotański, L.A.T. Bauerdick, S. De Pasquale, N. Coppola, B. A. Dolgoshein, G. Bari, J. M. Pawlak, S. W. Nam, N. Macdonald, Ulf Behrens, Federico Cindolo, S. Wölfle, Lucia Votano, C. Nath, O. Yu. Lukina, J.R. Okrasiński, Amedeo Staiano, J.J. Engelen, Z. Jing, D. Krakauer, M. Pfeiffer, P. G. Pelfer, H. Beier, Tadeusz Kowalski, S. A. Zotkin, A. Garfagnini, B. Bednarek, M. Inuzuka, S. Ritz, Amanda Cooper-Sarkar, D. C. Bailey, A. Sabetfakhri, C. Youngman, Jose Repond, A. Meyer, K. Umemori, Hao Zhang, D. Epperson, N. Cartiglia, D. S. Hanna, D. Filges, Yuji Yamazaki, Miriam Lucio Martinez, S. B. Lee, Anselmo Margotti, G. Poelz, A. Stifutkin, E. Rulikowska-Zarbska, J. D. McFall, L.W. Wiggers, Claudia Glasman, A. Quadt, F. Zetsche, W. S. Toothacker, R. Stanek, S. K. Dhawan, J.T. Wu, P.F. Ermolov, G. Howell, Giuseppe Levi, Gm Levman, Roberto Sacchi, M. Eckert, N.A. Korotkova, L. Bellagamba, D. Westphal, J. T. Rahn, U. Karshon, D Piccioni, S. Eisenhardt, J.B. Lane, W. H. Smith, Gy. Wolf, T. Ishii, D. S. Waters, Michele Arneodo, R. Kerger, K. Jelen, O. Ruske, Luis Hervas, D. Boscherini, Joanne Cole, B. Löhr, D. Mikunas, J.I. Fleck, L. Lindemann, J. Del Peso, J. A. Zakrzewski, L. M. Shcheglova, A. Bruni, Luca Stanco, Lev Khein, Mário Costa, H. Kowalski, Katsuo Tokushuku, R. J. Tapper, S. Kitamura, Aharon Levy, D. Hasell, Danuta Kisielewska, G. D'Agostini, R.C.E. Devenish, K. Homma, Alexander Kappes, W.R. Frisken, G. Castellini, J.S.T. Ng, S. Mattingly, L. Suszycki, G. Briskin, P.M. Kooijman, Umberto Dosselli, Q. Zhu, Jens Hartmann, Janusz Chwastowski, F. J. Sciulli, WN Cottingham, Giuseppe Iacobucci, J.K. Edmonds, A.I. van Sighem, Matthew Wing, K. Wick, Fernando Barreiro, Enrico Tassi, J. J. Whitmore, G. Abbiendi, D.D. Reeder, M. Wodarczyk, T. Y. Ling, Robert Klanner, A. Vaiciulis, U. Holm, S. Kananov, J. K. Sedgbeer, R. Pawlak, E. A. De Wolf, P. Nylander, K. K. Joo, J. R. Tickner, G. Laurenti, Y. Eisenberg, F. Dal Corso, Giancarlo Susinno, T. Massam, I. Gialas, G. Bruni, Laurel E. Sinclair, Mauro Morandin, M.A.J. Botje, Guillaume Garcia, L. W. Hung, M. Riveline, R. Walczak, U. Schneekloth, Jan Figiel, I. Bohnet, K. Heinloth, Tomohiro Abe, K. Coböken, Abhay Deshpande, P. Markun, G. F. Hartner, Roberto Carlin, W.F. Badgett, I. Butterworth, N. Tuning, K. Desler, Krzysztof Piotrzkowski, S. Magill, Giuseppe Barbagli, H. Wieber, J. Roldán, I.H. Park, A. Bornheim, Leszek Adamczyk, James Crittenden, Af Zarnecki, Y. Iga, A. Pesci, R. Wichmann, U. F. Katz, D. Chapin, R. Waugh, M. Y. Pac, A. Seiden, M.I. Ferrero, M. St-Laurent, Rodney Walker, O. Schwarzer, A. Meyer-Larsen, A. M. Czermak, Ben Bylsma, J. Milewski, G. Sartorelli, Ta Romanowski, M. Przybycien, B. Mellado, Z. Duliński, I. Suzuki, L. Iannotti, S. Yamada, A.A. Savin, D. S. Bailey, J.H. Vossebeld, M. Bukowy, M. Grothe, L. Heinz, A. Bertolin, M. C. Petrucci, K. Klimek, Giovanni Maccarrone, D. Hochman, J. Zajc, M. Raso, A. Eskreys, A. T. Doyle, S. Schlenstedt, P. J. Bussey, H. Hartmann, J. K. Bienlein, L. Labarga, T. Tsurugai, R. L. Talaga, S. Stonjek, J. F. de Trocóniz, Jonathan Butterworth, Jose M Hernandez, L. Zawiejski, Roberto Cirio, S. Dagan, C. Voci, Marta Ruspa, M. Khakzad, U. Fricke, W. Liu, V. A. Kuzinin, C. A. Heusch, C. M. Ginsburg, Yu. A. Golubkov, D. Kçira, B. Musgrave, Ian Brock, E. Lohrmann, M. Posocco, E. Paul, Sridhara Dasu, E. Strickland, Halina Abramowicz, T.P. Shah, Mark Sutton, L.K. Gladilin, S. M. Wang, D. H. Saxon, H.E. Blaikley, J. Ciborowski, R. Ullmann, T. Yamashita, P. Göttlicher, K. Yamauchi, M. Dardo, C. Coldewey, H. Raach, A. Polini, Matthias Kasemann, H. Salehi, P. Borzemski, D. Notz, M. Milite, W. Verkerke, T. W. Jones, Antonino Zichichi, G. L. Bashindzhagyan, W.B. Schmidke, R. J. Teuscher, J.J. Ryan, D.C. Williams, DG Roff, J. Stamm, B. Foster, D. Sideris, J. Y. Kim, Pietro Antonioli, D. B. Miller, Luisa Cifarelli, Neville Harnew, M. Basile, A. Pellegrino, T. Haas, F. Anselmo, V. W. Hughes, Richard Hall-Wilton, Silvia Maselli, J.T. Bromley, D. Horstmann, D. Acosta, N. H. Brook, Dg Stairs, Vincenzo Monaco, M. Rohde, R. Graciani, P. Cloth, R. Ayad, G. Cara Romeo, Tachishige Hirose, T. Matsushita, F. Goebel, R. Stroili, N. Pavel, Juan Terron, M. Kasprzak, R. Loveless, T. Fusayasu, Mariusz Przybycien, M. Corradi, C.H. Bokel, V.A. Noyes, S. J. Hong, S. Campbell-Robson, M. E. Hayes, N. A. McCubbin, H.J. Grabosch, A.S. Proskuryakov, Helen F Heath, U. Wollmer, D. Simmons, John Hart, M.C.K. Mattingly, L. S. Durkin, R. Hamatsu, J. Puga, Els Koffeman, K. Nagano, R. Deffner, M. Adamus, G. Marini, Wolfram Dietrich Zeuner, A.K. Wróblewski, A. Bamberger, Allen Caldwell, Cristiana Peroni, R. J. Cashmore, M. Derrick, T. Tymieniecka, U. Kötz, N. Gendner, O. Deppe, J. Breitweg, R. J. Nowak, F. Selonke, E. Hilger, R. Galea, F. Pelucchi, B.Y. Oh, C. Amelung, Rosario Nania, and Sung Keun Park
Subjects: Particle physics, Physics and Astronomy (miscellaneous), LUND MONTE-CARLO, Parton, 01 natural sciences, Zeus (malware), JET FRAGMENTATION, Nuclear physics, DEEP-INELASTIC SCATTERING, Pomeron, 0103 physical sciences, Rapidity, 010306 general physics, Engineering (miscellaneous), Quantum chromodynamics, Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, ZEUS, LARGE RAPIDITY GAP, POMERON STRUCTURE, PARTON DISTRIBUTIONS, PERTURBATION-THEORY, HARD SCATTERING, HERA, Deep inelastic scattering, Gluon, High Energy Physics::Experiment
Abstract: Differential dijet cross sections have been measured with the ZEUS detector for photoproduction events in which the hadronic final state containing the jets is separated with respect to the outgoing proton direction by a large rapidity gap. The cross section has been measured as a function of the fraction of the photon (ϰγOBS) and pomeron (βOBS) momentum participating in the production of the dijet system. The observed ϰγOBS dependence shows evidence for the presence of a resolved- as well as a direct-photon component. The measured cross section da/dβOBS increases as βOBS increases indicating that there is a sizeable contribution to dijet production from those events in which a large fraction of the pomeron momentum participates in the hard scattering. These cross sections and the ZEUS measurements of the diffractive structure function can be described by calculations based on parton densities in the pomeron which evolve according to the QCD evolution equations and include a substantial hard momentum component of gluons in the pomeron.

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25 results on '"J. R. Tickner"'

1. Measurement of the proton structure function F2 and σ at low and very low x at HERA

2. Study of charged—currentep interactions atQ 2>200 GeV2 with the ZEUS detector at HERA

3. Measurement of elasticρ 0 photoproduction at HERA

4. Measurement of the proton structure functionF 2 at lowx and lowQ 2 at HERA

5. Jet shapes at HERA

6. High Q(2) events in ep collisions

7. Leading baryons at low x(L) in DIS and photoproduction at ZEUS

8. Forward transverse energy flow and forward jets at low x

9. Measurement of the proton structure function F-2 and the total gamma*p cross-section at low Q(2) and low x

10. QCD fits to ZEUS and fixed target structure function data

11. F-2(D(3)) measurements at ZEUS

12. Measurement of dijets in DIS and comparison to NLO calculations

13. Searches at HERA for excited fermions, contact interactions, a heavy neutrino, and: a HERA excess?

14. Event shape analysis of multihadronic final states in deep inelastic rapidity gap events at HERA

15. Diffractive measurements from ZEUS

16. Diffractive production of charm and jets at HERA

17. Fragmentation functions at ZEUS

18. D* and J/psi inelastic photoproduction at HERA

19. A new on-belt elemental analyzer for the cement industry

20. ZEUS results on the measurement and phenomenology of F-2 at low x and low Q(2)

21. Observation of isolated high-E-T photons in photoproduction at HERA

22. Exclusive \(\rho^{0}\) production in deep inelastic electron-proton scattering at HERA

23. D* production in deep inelastic scattering at HERA

24. Measurement of elastic Υ photoproduction at HERA

25. Diffractive dijet cross sections in photoproduction at HERA

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25 results on '"J. R. Tickner"'

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