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1. 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
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2. 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
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3. Measurement of the charged multiplicity of events containing bottom hadrons atEc.m.=91GeV

Author: B. A. Schumm, D. S. Koetke, C. E. Adolphsen, J. P. Alexander, D. Averill, B. C. Barish, T. Barklow, B. A. Barnett, D. Blockus, A. Boyarski, B. Brabson, A. Breakstone, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, J. M. Dorfan, P. S. Drell, D. C. Drewer, D. Durrett, R. Elia, G. J. Feldman, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Hanson, R. Harr, B. Harral, F. A. Harris, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, R. G. Jacobsen, J. A. Jaros, C. K. Jung, J. A. Kadyk, C. Kenney, M. King, S. Komamiya, L. A. Kowalski, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. Lüth, J. A. McKenna, J. A. J. Matthews, T. Mattison, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O'Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, F. R. Rouse, D. R. Rust, H. F. W. Sadrozinski, A. S. Schwarz, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, M. Turala, R. Van Kooten, P. Weber, A. J. Weinstein, E. Wicklund, S. R. Wagner, M. Woods, M. Yurko, and C. Zaccardelli
Subjects: Nuclear physics, Physics, Quark, Particle decay, Particle physics, Electron–positron annihilation, Hadron, Quark model, High Energy Physics::Experiment, Elementary particle, Multiplicity (mathematics), Nuclear Experiment, Charged particle
Abstract: Using an impact-parameter tag to select an enriched sample of Z0bb» events, we have measured the difference between the average charged multiplicity of bb» and all hadronic Z0 decays to be 2.11.8(stat) 0.6(syst) tracks per event. The resulting total (nonleading) charged multiplicity for Z0 bb» events is 23.1(12.0)1.8 0.6 tracks. A comparison of this nonleading multiplicity to hadronic multiplicity data in the range of 10 to 60 GeV supports the hypothesis of flavor-independent hadronic fragmentation, and yields a measurement of the average energy fraction of bottom hadrons in Z0 decays of xEb=0.620.100.04. © 1992 The American Physical Society.
Published: 1992
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4. Measurement of thebb¯fraction in hadronicZ0decays with precision vertex detectors

Author: R. G. Jacobsen, D. S. Koetke, C. E. Adolphsen, D. Fujino, B. A. Schumm, S. R. Wagner, J. P. Alexander, D. Averill, B. C. Barish, T. Barklow, B. A. Barnett, D. Blockus, A. Boyarski, B. Brabson, A. Breakstone, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, J. M. Dorfan, P. S. Drell, D. C. Drewer, D. Durrett, R. Elia, G. J. Feldman, R. C. Field, W. T. Ford, C. Fordham, R. Frey, K. K. Gan, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Hanson, R. Harr, B. Harral, F. A. Harris, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, J. A. Jaros, C. K. Jung, J. A. Kadyk, C. Kenney, M. King, S. Komamiya, L. A. Kowalski, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. Lüth, J. A. McKenna, J. A. J. Matthews, T. Mattison, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O’Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, D. R. Rust, H. F. W. Sadrozinski, A. S. Schwarz, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, M. Turala, R. Van Kooten, P. Weber, A. J. Weinstein, E. Wicklund, M. Woods, M. Yurko, and C. Zaccardelli
Subjects: Nuclear physics, Physics, Particle physics, Particle decay, Annihilation, Distribution function, Hadron, General Physics and Astronomy, Elementary particle, Particle identification, Bar (unit), Boson
Abstract: We have measured the fraction of {ital b{bar b}} events in hadronic {ital Z}{sup 0} decays, {ital R}{sub {ital b}{ital {bar b}}}, using the vertex detector system of the Mark II detector at the SLAC Linear Collider. We tag {ital b{bar b}} events by requiring the coincidence of three or more tracks with significant impact parameters. This tag is 50% efficient and results in a sample of 85% purity. We find {ital R}{sub {ital b}{ital {bar b}}}=0.251{plus minus}0.049{plus minus}0.030, in good agreement with other measurements and the standard model prediction.
Published: 1991
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5. Searches for supersymmetric particles produced inZ-boson decay

Author: T. Barklow, G. S. Abrams, C. E. Adolphsen, D. Averill, J. Ballam, B. C. Barish, B. A. Barnett, J. Bartelt, S. Bethke, D. Blockus, G. Bonvicini, A. Boyarski, B. Brabson, A. Breakstone, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, D. E. Dorfan, J. M. Dorfan, D. C. Drewer, R. Elia, G. J. Feldman, D. Fernandes, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, C. Gatto, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Grindhammer, P. Grosse-Wiesmann, G. Hanson, R. Harr, B. Harral, F. A. Harris, C. M. Hawkes, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, R. G. Jacobsen, J. A. Jaros, C. K. Jung, J. A. Kadyk, J. Kent, M. King, D. S. Koetke, S. Komamiya, W. Koska, L. A. Kowalski, W. Kozanecki, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, R. R. Larsen, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. Lüth, J. A. McKenna, J. A. J. Matthews, T. Mattison, B. D. Milliken, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O’Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, K. Riles, F. R. Rouse, D. R. Rust, H. F. W. Sadrozinski, M. W. Schaad, B. A. Schumm, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, R. Van Kooten, P. Voruganti, S. R. Wagner, S. Watson, P. Weber, A. J. Weinstein, A. J. Weir, E. Wicklund, M. Woods, D. Y. Wu, M. Yurko, C. Zaccardelli, and C. von Zanthier
Subjects: Physics, Particle physics, Annihilation, Electron–positron annihilation, Degenerate energy levels, General Physics and Astronomy, Elementary particle, Supersymmetry, Linear particle accelerator, law.invention, Nuclear physics, law, Collider, Boson
Abstract: We have searched for supersymmetric particles in 528 Z decays with the Mark II detector at the SLAC Linear Collider. We place 95%-confidence-level lower mass limits on degenerate squarks, nondegenerate up-type squarks, nondegenerate down-type squarks, charginos, pair-produced unstable neutralinos, and neutralinos from associated production. © 1990 The American Physical Society.
Published: 1990
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6. Measurements of charged-particle inclusive distributions in hadronic decays of theZboson

Author: G. S. Abrams, C. E. Adolphsen, D. Averill, J. Ballam, B. C. Barish, T. Barklow, B. A. Barnett, J. Bartelt, S. Bethke, D. Blockus, G. Bonvicini, A. Boyarski, B. Brabson, A. Breakstone, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, D. E. Dorfan, J. M. Dorfan, D. C. Drewer, R. Elia, G. J. Feldman, D. Fernandes, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Grindhammer, P. Grosse-Wiesmann, G. Hanson, R. Harr, B. Harral, F. A. Harris, C. M. Hawkes, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, R. G. Jacobsen, J. A. Jaros, C. K. Jung, J. A. Kadyk, J. Kent, M. King, S. R. Klein, D. S. Koetke, S. Komamiya, W. Koska, L. A. Kowalski, W. Kozanecki, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, R. R. Larsen, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. Lüth, J. A. McKenna, J. A. J. Matthews, T. Mattison, B. D. Milliken, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O’Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, F. Perrier, A. Petersen, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, K. Riles, F. R. Rouse, D. R. Rust, H. F. W. Sadrozinski, M. W. Schaad, B. A. Schumm, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, R. Van Kooten, P. Voruganti, S. R. Wagner, S. Watson, P. Weber, A. Weigend, A. J. Weinstein, A. J. Weir, E. Wicklund, M. Woods, D. Y. Wu, M. Yurko, C. Zaccardelli, and C. von Zanthier
Subjects: Physics, Quantum chromodynamics, Particle physics, Annihilation, Computer Science::Information Retrieval, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle, Charged particle, Nuclear physics, Particle decay, High Energy Physics::Experiment, Boson
Abstract: We have measured inclusive distributions for charged particles in hadronic decays of the {ital Z} boson. The variables chosen for study were charged-particle multiplicity, scaled momentum, and momenta transverse to the sphericity axes. The distributions have been corrected for detector effects and are compared with data from {ital e}{sup +}{ital e}{sup {minus}} annihilation at lower energies and with the predictions of several QCD-based models. The data are in reasonable agreement with expectations.
Published: 1990
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7. Measurement of thebb¯fraction in hadronicZdecays

Author: J. F. Kral, G. S. Abrams, C. E. Adolphsen, D. Averill, J. Ballam, B. C. Barish, T. Barklow, B. A. Barnett, J. Bartelt, S. Bethke, D. Blockus, G. Bonvicini, A. Boyarski, B. Brabson, A. Breakstone, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, D. E. Dorfan, J. M. Dorfan, D. C. Drewer, R. Elia, G. J. Feldman, D. Fernandes, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, C. Gatto, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Grindhammer, P. Grosse-Wiesmann, G. Hanson, R. Harr, B. Harral, F. A. Harris, C. M. Hawkes, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, R. G. Jacobsen, J. A. Jaros, C. K. Jung, J. A. Kadyk, J. Kent, M. King, S. R. Klein, D. S. Koetke, S. Komamiya, W. Koska, L. A. Kowalski, W. Kozanecki, M. Kuhlen, L. Labarga, A. J. Lankford, R. R. Larsen, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. Lüth, J. A. McKenna, J. A. J. Matthews, T. Mattison, B. D. Milliken, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O’Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, K. Riles, F. R. Rouse, D. R. Rust, H. F. W. Sadrozinski, M. W. Schaad, B. A. Schumm, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, R. Van Kooten, P. Voruganti, S. R. Wagner, S. Watson, P. Weber, A. J. Weinstein, A. J. Weir, E. Wicklund, M. Woods, D. Y. Wu, M. Yurko, C. Zaccardelli, and C. von Zanthier
Subjects: Nuclear physics, Physics, Particle physics, Particle decay, Annihilation, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle, Fermion, Lepton, Standard Model
Abstract: Using isolated leptons reconstructed in the Mark II detector to tag bb events, we measure the fraction of bb events in hadronic Z0 decays to be 0.23-0.09+0.11, in good agreement with the standard-model prediction of 0.22. We find (Zbb)=0.43-0.17+0.21 GeV. © 1990 The American Physical Society.
Published: 1990
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8. 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. 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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

9. 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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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: 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

10. 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

11. 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. 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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. 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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: 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

12. 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

13. 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

14. 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

15. 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

16. 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

17. 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

18. 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

19. 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

20. 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

21. BEAM TESTS OF THE ZEUS BARREL CALORIMETER

Author: ZEUS Collaboration M. Derrick, D. Krakauer, S. Magill, B. Musgrave, J. Repond, S. Repond, R. Stanek, R. L. Talaga, J. Thron Argonne National Laboratory, Argonne, IL, USA 47 F. Arzarello, R. Ayad l, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini 2, M. Chiarini, L. Cifarelli, F. Cindolo, F. Ciralli, A. Contin, S. D'Auria, C. Del Papa, F. Frasconi, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, Q. Lin, B. Lisowski, G. Maccarrone, A. Margotti, T. Massam, R. Nania, C. Nemoz, F. Palmonari, G. Sartorelli, R. Timellini, Y. Zamora Garcia l, A. Zichichi University, INFN Bologna, Bologna, Italy 39 A. Bargende, J. Crittenden, K. Desch, B. Diekmann, T. Doeker, A. Frey, M. Geerts, G. Geitz, H. Hartmann, D. Haun, K. Heinloth, E. Hilger, H. P. Jakob, S. Kramarczyk, M. Kiickes 3, A. Mass, S. Mengel, J. Mollen, D. Monaldi4, H. Miisch 5, E. Paul, R. Schattevoy, J. L. Schneider, D. Schramm, R. Wedemeyer Physikalisches Institut der Universitiit Bonn, Bonn, Federal Republic of Germany 36 A. Cassidy, D. G. Cussans, N. Dyce, B. Foster, R. Gilmore, G. P. Heath, H. F. Heath, M. Lancaster, T. J. Llewellyn, J. Malos, C. J. S. Morgado, R. J. Tapper, S. S. Wilson, R. Yoshida H. H. Wills Physics Laboratory, University of Bristol, Bristol, UK 46 R. R. Rau Brookhaven National Laboratory, Upton, L. I., USA 47 M. Arneodo, M. Schioppa, G. Susinno Calabria University, Physics Department, INFN, Cosenza, Italy 39 A. Bernstein, A. Caldwell, I. Gialas, J. A. Parsons, S. Ritz, F. Sciulli 6, P. B. Straub, L. Wai, S. Yang Columbia University, Nevis Labs, Irvington on Hudson, USA 48 P. Borzemski, J. Chwastowski 7, A. Dwura~ny, A. Eskreys, Z. Jakubowski 8 B. Niziot, K. Piotrzkowski, M. Zachara, L. Zawiejski Institute of Nuclear Physics, Cracow, Poland 43 L. Adamczyk, B. Bednarek, K. Eskreys, K. Jelefi, D. Kisielewska, T. Kowalski, E. Rulikowska Zar~bska, L. Suszycki, J. Zaj0c Faculty of Physics, Nuclear T.e.c.h.n.i.q.u.e.s. Academy of Mining, Metallurgy, Cracow, Poland 43 T. Kgdzierski, A. Kotafiski, M. Przybyciefi Jagellonian University, Department of Physics, Poland 43 L. A. T. Bauerdick, U. Behrens, J. K. Bienlein, S. B6ttcher, C. Coldewey, A. Dannemann, G. Drews, P. Erhard 9, M. Flasifiski 10, I. Fleck, R. Gl~iser l. l, p. G6ttlicher, B. Gutjahr, T. Haas, L. Hagge, W. Hain, D. Hasell, H. Hultschig, G. Jahnen 12, p. Joos, M. Kasemann, R. Klanner, W. Koch, L. K6pke, U. K6tz, H. Kowalski, W. Kr6ger, J. Kriiger, J. Labs, A. Ladage, B. L6hr, M. L6we, D. Lfike, J. Mainusch, O. Manczak, M. Momayezi 13, J. S. T. Ng, S. Nickel, D. Notz, K. U. P6snecker 14, M. Rohde, J. Roldfin 15, E. Ros 7, U. Schneekloth, J. Schroeder, W. Schulz, F. Selonke, E. Stiliaris 15, E. Tscheslog 17, T. Tsurugai, W. Vogel 17, G. Wolf, C. Youngman Deutsches Elektronen Synchrotron DESE Hamburg, Federal Republic of Germany H. J. Grabosch, A. Leich, A. Meyer, C. Rethfeldt, S. Schlenstedt DESY Zeuthen, Institut fiir Hochenergiephysik, Zeuthen, Federal Republic of Germany G. Barbagli, A. Francescato, M. Nuti, P. Pelfer University, INFN, Florence, Italy 39 G. Anzivino, R. Casaccia, S. De Pasquale, S. Qian, L. Votano INFN, Laboratori Nazionali di Frascati, Frascati, Italy 39 A. Bamberger, A. Freidhof, T. Poser, S. S61dner Rembold, G. Theisen, T. Trefzger Physikalisches Institut der Universitgit Freiburg, Freiburg, Federal Republic of Germany 36 N. H. Brook, P. J. Bussey, A. T. Doyle, J. R. Forbes, V. A. Jamieson, C. Raine, D. H. Saxon Department of Physics, Astronomy, University of Glasgow, Glasgow, UK 46 H. Brtickmann 18, G. Gloth, U. Holm, H. Kammerlocher, B. Krebs, T. Neumann, K. Wick Hamburg University, 1st Institute of Experimental Physics, Hamburg, Federal Republic of Germany 36 A. Fiirtjes, E. Lohrmann, J. Milewski 19, M. Nakahata 2°, N. Pavel, G. Poelz, W. Schott, J. Terron 15, F. Zetsche Hamburg U.n.i.v.e.r.s.i.t.y. Hnd Institute ofExperimental Physics, Federal Republic of Germany 36 T. C. Bacon, R. Beuselinck, I. Butterworth, E. Gallo, V. L. Harris, D. B. Miller, A. Prinias, J. K. Sedgbeer, A. Vorvolakos, A. Whitfield Imperial College London, High Energy Nuclear Physics Group, London, UK 46 T. Bienz, H. Kreutzmann, U. Mallik, E. McCliment, M. Roco, M. Z. Wang University of lowa, Physics, Astronomy Department, Iowa City, USA 47 P. Cloth, D. Filges Forschungszentrum Jiilich, lnstitut fiir Kernphysik, J.i.i.l.i.c.h. Federal Republic of Germany S. H. An, S. M. Hong, C. O. Kim, T. Y. Kim, S. W. Nam, S. K. Park, M. H. Suh, S. H. Yon Korea University, Seou[, Korea 4] R. Imlay, S. Kartik, H. J. Kim, R. R. McNeil, W. Metcalf, V. K. Nadendla Louisiana State University, Department ~ Physics, Baton Rouge, USA 47 F. Barreiro 21, G. Cases, L. Herv~s 22, L. Labarga 22, j. del Peso, J. F. de Troc6niz 23 U.n.i.v.e.r. Aut6noma Madrid, Depto de Fisica Te6rlca, Madrid, Spain 45 F. Ikraiam, J. K. Mayer, G. R. Smith University of Manitoba, Winnipeg, Manitoba, Canada 34 F. Corriveau, D. J. Gilkinson, D. S. Hanna 6, j. Hartmann, L. W. Hung, J. N. Lira, R. Meijer Drees, J. W. Mitchell, P. M. Patel, L. E. Sinclair, D. G. Stairs, M. S.t. Laurent, R. Ullmann McGill University, Montreal, Quebec, Canada 34, 35 G. L. Bashindzhagyan, P. F. Ermolov, L. K. Gladilin, Y. A. Golubkov, V. A. Kuzmin, E. N. Kuznetsov, A. A. Savin, A. G. Voronin, N. P. Zotov Moscow State University, Institute of Nuclear Pysics, Moscow, Russia 44 S. Bentvelsen, M. Botje, A. Dake, J. Engelen, P. de Jong, M. de Kamps, P. Kooijman, A. Kruse, H. van der Lugt, V. O'Dell, A. Tenner, H. Tiecke, H. Uijterwaa124, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg N1KHEF Amsterdam, Amsterdam, Netherlands 42 B. Bylsma, L. S. Durkin, K. Honscheid, C. Li, T. Y. Ling, K. W. McLean, W. N. Murray, I. H. Park, T. A. Romanowski 25 R. Seidlein Ohio State University, Columbus, OH, USA 47 G. A. Blair, A. Byrne, R. J. Cashmore, A. M. Cooper Sarkar, R. C. E. Devenish, D. M. Gingrich 26, P. M. Hallam Baker 7 N. Harnew, T. Khatri, K. R. Long, P. Luffman, 1. McArthur, P. Morawitz, J. Nash, S. J. P. Smith 27, N. C. Roocroft, F. F. Wilson Department of Physics, University of Oxford, Oxford, UK 46 G. Abbiendi, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, F. Gasparini, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci Dipartimento di Fisica dell Universita, INFN, Padova, ltaly 39 J. M. Butterworth, J. Bulmahn, G. Feild, B. Y. Oh 28, j. Whitmore 29 Pennsylvania State University, University Park, USA 48 U. Contino, G. D'Agostini, M. Guida 30, M. Iori, G. Marini, M. Mattioli, A. Nigro Dipartimento di Fisica, Universiffz 'La Sapienza, INFN, Rome, Italy 39 J. C. Hart, N. A. McCubbin, K. Prytz, T. P. Shah, T. L. Short Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, UK 46 E. Barberis, N. Cartiglia, C. Heusch, B. Hubbard, J. Leslie, W. Lockman, K. O'Shaughnessy, H. F. Sadrozinski, A. Seiden, D. Zer Zion University of California, Santa Cruz, USA 47 E. Badura, J. Biltzinger, R. J. Seifert, A. H. Walenta, G. Zech Fachbereich Physik der Universitgit Gesamthochschule Siegen, Siegen, Federal Republic of Germany 36 S. Dagan 31, A. Levy School of Physics, Tel Aviv University, Tel Aviv, Israel 38 T. Hasegawa, M. Hazumi, T. Ishii, S. Kasai 32, M. Kuze, S. Mine, Y. Nagasawa, T. Nagira, M. Nakao, H. Okuno, I. Suzuki, K. Tokushuku, S. Yamada, Y. Yamazaki Institute for Nuclear Study, University of Tokyo, Tokyo, Japan 4° M. Chiba, R. Hamatsu, T. Hirose, S. Kitamura, S. Nagayama, Y. Nakamitsu Tokyo Metropolitan University, Japan 4° R. Cirio, M. Costa, M. I. Ferrero, L. Lamberti, S. Maselli, C. Peroni, A. Solano, A. Staiano Universith di Torino, Dipartimento di Fisica Sperimentale, INFN, Torino, Italy 39 M. Dardo Facultd di Scienze, University of Torino, Alessandria, INFN Sezione di Torino, Torino, Italy 39 D. C. Bailey, D. Bandyopadhyay, F. Benard, S. Bhadra, M. Brkic, B. D. Burow, F. S. Chlebana, M. B. Crombie, G. F. Hartner, G. M. Levman, J. F. Martin, R. S. Orr, J. D. Prentice, C. R. Sampson, G. G. Stairs, R. J. Teuscher, T. S. Yoon University of Toronto, Toronto, O.n.t., Canada 34 F. W. Bullock, C. D. Catterall, J. C. Giddings, T. W. Jones, A. M. Khan, J. B. Lane, P. L. Makkar, D. Shaw, J. Shulman University College London, UK 46 K. Blankenship, J. Kochocki, B. Lu, L. W. Mo Virginia Polytechnic Institute, State University, Blacksburg, VA, USA 48 K. Charchuta, J. Ciborowski, J. Gajewski, G. Grzelak, M. Kasprzak, M. Krzyzanowski, K. Muchorowski, R. J. Nowak, J. M. Pawlak, A. Stopczyfiski, T. Tymieniecka, R. Walczak, A. K. Wr6blewski, J. A. Zakrzewski, A. F. Zarnecki Warsaw University, Institute of Experimental Physics, Warsaw, Poland 43 M. Adamus Institute for Nuclear Studies, Poland 43 H. Abramowicz 19, y. Eisenberg, C. Glasman 33, U. Karshon 31, A. Montag 3J, D. Revel, A. Shapira Weizmann Institute, Nuclear Physics Department, Rehovot, Israel 37 C. Foudas, C. Fordham, R. J. Loveless, A. Goussiou, I. Ali, B. Behrens, S. Dasu, D. D. Reeder, W. H. Smith, S. Silverstein University of Wisconsin, Madison, W1, USA 47 W. R. Frisken, K. M. Furutani, Y. Iga York University, North York, O.n.t., MARI, Stefano Maria, ZEUS Collaboration M., Derrick, D., Krakauer, S., Magill, B., Musgrave, J., Repond, S., Repond, R., Stanek, R. L., Talaga, J., Thron Argonne National Laboratory, Argonne, Il, USA 47 F., Arzarello, R., Ayad l, G., Bari, M., Basile, L., Bellagamba, D., Boscherini, A., Bruni, G., Bruni, P., Bruni, G., Cara Romeo, G., Castellini 2, M., Chiarini, L., Cifarelli, F., Cindolo, F., Ciralli, A., Contin, S., D'Auria, C., Del Papa, F., Frasconi, P., Giusti, G., Iacobucci, G., Laurenti, G., Levi, Q., Lin, B., Lisowski, G., Maccarrone, A., Margotti, T., Massam, R., Nania, C., Nemoz, F., Palmonari, G., Sartorelli, R., Timellini, Y., Zamora Garcia l, A., Zichichi University, Infn, Bologna, Bologna, Italy 39 A., Bargende, J., Crittenden, K., Desch, B., Diekmann, T., Doeker, A., Frey, M., Geert, G., Geitz, H., Hartmann, D., Haun, K., Heinloth, E., Hilger, H. P., Jakob, S., Kramarczyk, M., Kiickes 3, A., Ma, S., Mengel, J., Mollen, D., Monaldi4, H., Miisch 5, E., Paul, R., Schattevoy, J. L., Schneider, D., Schramm, R., Wedemeyer Physikalisches Institut der Universitiit Bonn, Bonn, Federal Republic of Germany 36 A., Cassidy, D. G., Cussan, N., Dyce, B., Foster, R., Gilmore, G. P., Heath, H. F., Heath, M., Lancaster, T. J., Llewellyn, J., Malo, C. J. S., Morgado, R. J., Tapper, S. S., Wilson, R. Yoshida H. H., Wills Physics Laboratory, University of, Bristol, Bristol, UK 46 R. R., Rau Brookhaven National Laboratory, Upton, L. I., Ny, USA 47 M., Arneodo, M., Schioppa, G., Susinno Calabria University, Physics, Department, Infn, Cosenza, Italy 39 A., Bernstein, A., Caldwell, I., Giala, J. A., Parson, S., Ritz, F., Sciulli 6, P. B., Straub, L., Wai, S., Yang Columbia University, Nevis, Lab, Irvington on, Hudson, USA 48 P., Borzemski, J., Chwastowski 7, A., Dwura~ny, A., Eskrey, Z. Jakubowski 8 B., Niziot, K., Piotrzkowski, M., Zachara, L., Zawiejski Institute of Nuclear Physic, Cracow, Poland 43 L., Adamczyk, B., Bednarek, K., Eskrey, K., Jelefi, D., Kisielewska, T., Kowalski, E., Rulikowska Zar~bska, L., Suszycki, J., Zaj0c Faculty of Physic, Academy of Mining, Nuclear T. e. c. h. n. i. q. u. e. s., Metallurgy, Cracow, Poland 43 T., Kgdzierski, A., Kotafiski, M., Przybyciefi Jagellonian University, Department of, Physic, Poland 43 L. A. T., Bauerdick, U., Behren, J. K., Bienlein, S., B6ttcher, C., Coldewey, A., Dannemann, G., Drew, P., Erhard 9, M., Flasifiski 10, I., Fleck, R. Gl~iser l., L, P., G6ttlicher, B., Gutjahr, T., Haa, L., Hagge, W., Hain, D., Hasell, H., Hultschig, G., Jahnen 12, P., Joo, M., Kasemann, R., Klanner, W., Koch, L., K6pke, U., K6tz, H., Kowalski, W., Kr6ger, J., Kriiger, J., Lab, A., Ladage, B., L6hr, M., L6we, D., Lfike, J., Mainusch, O., Manczak, M., Momayezi 13, J. S. T., Ng, S., Nickel, D., Notz, K. U., P6snecker 14, M., Rohde, J., Roldfin 15, E., Ros 7, U., Schneekloth, J., Schroeder, W., Schulz, F., Selonke, E., Stiliaris 15, E., Tscheslog 17, T., Tsurugai, W., Vogel 17, G., Wolf, C., Youngman Deutsches Elektronen Synchrotron DESE Hamburg, Federal Republic of Germany H. J., Grabosch, A., Leich, A., Meyer, C., Rethfeldt, S., Schlenstedt DESY Zeuthen, Institut fiir, Hochenergiephysik, Zeuthen, Federal Republic of Germany G., Barbagli, A., Francescato, M., Nuti, P., Pelfer University, Infn, Florence, Italy 39 G., Anzivino, R., Casaccia, S., De Pasquale, S., Qian, L., Votano INFN, Laboratori Nazionali di, Frascati, Frascati, Italy 39 A., Bamberger, A., Freidhof, T., Poser, S., S61dner Rembold, G., Theisen, T., Trefzger Physikalisches Institut der Universitgit Freiburg, Freiburg, Federal Republic of Germany 36 N. H., Brook, P. J., Bussey, A. T., Doyle, J. R., Forbe, V. A., Jamieson, C., Raine, D. H., Saxon Department of Physic, Astronomy, University of, Glasgow, Glasgow, UK 46 H., Brtickmann 18, G., Gloth, U., Holm, H., Kammerlocher, B., Kreb, T., Neumann, K., Wick Hamburg University, 1st Institute of Experimental, Physic, Hamburg, Federal Republic of Germany 36 A., Fiirtje, E., Lohrmann, J., Milewski 19, M., Nakahata 2°, N., Pavel, G., Poelz, W., Schott, J., Terron 15, Hnd Institute ofExperimental Physics, F. Zetsche Hamburg U. n. i. v. e. r. s. i. t. y., Federal Republic of Germany 36 T. C., Bacon, R., Beuselinck, I., Butterworth, E., Gallo, V. L., Harri, D. B., Miller, A., Prinia, J. K., Sedgbeer, A., Vorvolako, A., Whitfield Imperial College London, High Energy Nuclear Physics, Group, London, UK 46 T., Bienz, H., Kreutzmann, U., Mallik, E., Mccliment, M., Roco, M. Z., Wang University of lowa, Physics, Astronomy, Department, Iowa, City, USA 47 P., Cloth, D., Filges Forschungszentrum Jiilich, lnstitut fiir, Kernphysik, J. i. i. l. i. c. h. Federal Republic of Germany S. H., An, S. M., Hong, C. O., Kim, T. Y., Kim, S. W., Nam, S. K., Park, M. H., Suh, S. H., Yon Korea University, Seou[, Korea 4] R., Imlay, S., Kartik, H. J., Kim, R. R., Mcneil, W., Metcalf, V. K., Nadendla Louisiana State University, Department, ~ Physic, Baton, Rouge, La, USA 47 F., Barreiro 21, G., Case, L., Herv~s 22, L., Labarga 22, J., del Peso, Aut6noma Madrid, J. F. de Troc6niz 23 U. n. i. v. e. r., Depto de Fisica, Te6rlca, Madrid, Spain 45 F., Ikraiam, J. K., Mayer, G. R., Smith University of Manitoba, Winnipeg, Manitoba, Canada 34 F., Corriveau, D. J., Gilkinson, D. S., Hanna 6, J., Hartmann, L. W., Hung, J. N., Lira, R., Meijer Dree, J. W., Mitchell, P. M., Patel, L. E., Sinclair, D. G., Stair, Laurent, M. S. t., R., Ullmann McGill University, Montreal, Quebec, Canada, 34, 35 G. L., Bashindzhagyan, P. F., Ermolov, L. K., Gladilin, Y. A., Golubkov, V. A., Kuzmin, E. N., Kuznetsov, A. A., Savin, A. G., Voronin, N. P., Zotov Moscow State University, Institute of Nuclear, Pysic, Moscow, Russia 44 S., Bentvelsen, M., Botje, A., Dake, J., Engelen, P., de Jong, M., de Kamp, P., Kooijman, A., Kruse, H., van der Lugt, V., O'Dell, A., Tenner, H., Tiecke, H., Uijterwaa124, M., Vreeswijk, L., Wigger, E., de Wolf, R., van Woudenberg N1KHEF Amsterdam, Amsterdam, Netherlands 42 B., Bylsma, L. S., Durkin, K., Honscheid, C., Li, T. Y., Ling, K. W., Mclean, W. N., Murray, I. H., Park, T. A. Romanowski 25 R., Seidlein Ohio State University, Columbus, Oh, USA 47 G. A., Blair, A., Byrne, R. J., Cashmore, A. M., Cooper Sarkar, R. C. E., Devenish, D. M., Gingrich 26, P. M. Hallam Baker 7 N., Harnew, T., Khatri, K. R., Long, P., Luffman, 1., Mcarthur, P., Morawitz, J., Nash, S. J. P., Smith 27, N. C., Roocroft, F. F., Wilson Department of Physic, University of, Oxford, Oxford, UK 46 G., Abbiendi, R., Brugnera, R., Carlin, F., Dal Corso, M., De Giorgi, U., Dosselli, F., Gasparini, S., Limentani, M., Morandin, M., Posocco, L., Stanco, R., Stroili, C., Voci Dipartimento di Fisica dell Universita, Infn, Padova, ltaly 39 J. M., Butterworth, J., Bulmahn, G., Feild, B. Y., Oh 28, J., Whitmore 29 Pennsylvania State University, University, Park, Pa, USA 48 U., Contino, G., D'Agostini, M., Guida 30, M., Iori, Mari, Stefano Maria, G., Marini, M., Mattioli, A., Nigro Dipartimento di Fisica, Universiffz 'La, Sapienza, Infn, Rome, Italy 39 J. C., Hart, N. A., Mccubbin, K., Prytz, T. P., Shah, T. L., Short Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, UK 46 E., Barberi, N., Cartiglia, C., Heusch, B., Hubbard, J., Leslie, W., Lockman, K., O'Shaughnessy, H. F., Sadrozinski, A., Seiden, D., Zer Zion University of California, Santa, Cruz, Ca, USA 47 E., Badura, J., Biltzinger, R. J., Seifert, A. H., Walenta, G., Zech Fachbereich Physik der Universitgit Gesamthochschule Siegen, Siegen, Federal Republic of Germany 36 S., Dagan 31, A., Levy School of Physic, Tel Aviv, University, Tel, Aviv, Israel 38 T., Hasegawa, M., Hazumi, T., Ishii, S., Kasai 32, M., Kuze, S., Mine, Y., Nagasawa, T., Nagira, M., Nakao, H., Okuno, I., Suzuki, K., Tokushuku, S., Yamada, Y., Yamazaki Institute for Nuclear Study, University of, Tokyo, Tokyo, Japan 4° M., Chiba, R., Hamatsu, T., Hirose, S., Kitamura, S., Nagayama, Y., Nakamitsu Tokyo Metropolitan University, Japan 4° R., Cirio, M., Costa, M. I., Ferrero, L., Lamberti, S., Maselli, C., Peroni, A., Solano, A., Staiano Universith di Torino, Dipartimento di Fisica, Sperimentale, Infn, Torino, Italy 39 M., Dardo Facultd di Scienze, University of, Torino, Alessandria, INFN Sezione di, Torino, Torino, Italy 39 D. C., Bailey, D., Bandyopadhyay, F., Benard, S., Bhadra, M., Brkic, B. D., Burow, F. S., Chlebana, M. B., Crombie, G. F., Hartner, G. M., Levman, J. F., Martin, R. S., Orr, J. D., Prentice, C. R., Sampson, G. G., Stair, R. J., Teuscher, T. S., Yoon University of Toronto, Toronto, O. n. t., Canada 34 F. W., Bullock, C. D., Catterall, J. C., Gidding, T. W., Jone, A. M., Khan, J. B., Lane, P. L., Makkar, D., Shaw, J., Shulman University College London, UK 46 K., Blankenship, J., Kochocki, B., Lu, L. W., Mo Virginia Polytechnic Institute, State, University, Blacksburg, Va, USA 48 K., Charchuta, J., Ciborowski, J., Gajewski, G., Grzelak, M., Kasprzak, M., Krzyzanowski, K., Muchorowski, R. J., Nowak, J. M., Pawlak, A., Stopczyfiski, T., Tymieniecka, R., Walczak, A. K., Wr6blewski, J. A., Zakrzewski, A. F., Zarnecki Warsaw University, Institute of Experimental, Physic, Warsaw, Poland 43 M., Adamus Institute for Nuclear Studie, Poland 43 H., Abramowicz 19, Y., Eisenberg, C., Glasman 33, U., Karshon 31, A., Montag 3J, D., Revel, A., Shapira Weizmann Institute, Nuclear Physics, Department, Rehovot, Israel 37 C., Fouda, C., Fordham, R. J., Lovele, A., Goussiou, I., Ali, B., Behren, S., Dasu, D. D., Reeder, W. H., Smith, S., Silverstein University of Wisconsin, Madison, W1, USA 47 W. R., Frisken, K. M., Furutani, Y., Iga York University, North, York, and O. n., T.
Subjects: Physics, Nuclear and High Energy Physics, ZEUS (particle detector), Spectrometer, Physics::Instrumentation and Detectors, DESY, HERA, Particle detector, Calorimeter, Nuclear physics, Physics::Accelerator Physics, High Energy Physics::Experiment, Fermilab, Instrumentation, Beam (structure)
Abstract: A fully compensating uranium—scintillator calorimeter was constructed for the ZEUS detector at HERA. Several of the barrel calorimeter modules were subjected to beam tests at Fermilab before shipping them to DESY for installation. The calibrations of the modules used beams of electrons and hadrons, measuring the uniformity of the response, and checking the resolution. The runs also provided opportunity to test a large fraction of the actual ZEUS calorimeter readout system in an integrated beam environment more than one year before HERA turn on. The experiment utilized two computer controlled mechanical structures, one of which was capable of holding up to four modules in order to study shower containment, and a magnetic spectrometer with a high resolution beam tracking system. During two running periods, beams of 6 to 110 GeV containing e, μ, π, and p were used. The results show energy resolutions of 35%/ E for hadrons and 19%/ E for electrons, uniformities at the 1% level, energy nonlinearity less than 1%, and equal response for electrons and hadrons.
Published: 1993

22. 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

23. Direct search for pair production of heavy stable charged particles in Z decays

Author: E. Soderstrom, J. A. McKenna, G. S. Abrams, C. E. Adolphsen, D. Averill, J. Ballam, B. C. Barish, T. Barklow, B. A. Barnett, J. Bartelt, S. Bethke, D. Blockus, G. Bonvicini, A. Boyarski, B. Brabson, A. Breakstone, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, D. E. Dorfan, J. M. Dorfan, D. C. Drewer, R. Elia, G. J. Feldman, D. Fernandes, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Grindhammer, P. Grosse-Wiesmann, G. Hanson, R. Harr, B. Harral, F. A. Harris, C. M. Hawkes, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, R. G. Jacobsen, J. A. Jaros, C. K. Jung, J. A. Kadyk, J. Kent, M. King, D. S. Koetke, S. Komamiya, W. Koska, L. A. Kowalski, W. Kozanecki, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, R. R. Larsen, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. Lüth, J. A. J. Matthews, T. Mattison, B. D. Milliken, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O’Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, K. Riles, F. R. Rouse, D. R. Rust, H. F. W. Sadrozinski, M. W. Schaad, B. A. Schumm, A. Seiden, J. G. Smith, A. Snyder, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, R. Van Kooten, P. Voruganti, S. R. Wagner, S. Watson, P. Weber, A. J. Weinstein, A. J. Weir, E. Wicklund, M. Woods, D. Y. Wu, M. Yurko, C. Zaccardelli, and C. von Zanthie
Subjects: Physics, Particle physics, Annihilation, Muon, General Physics and Astronomy, Elementary particle, Fermion, Charged particle, law.invention, Nuclear physics, Pair production, law, High Energy Physics::Experiment, Collider, Lepton
Abstract: A search for pair production of stable charged particles from Z decay has been performed with the Mark II detector at the SLAC Linear Collider. Particle masses are determined from momentum, ionization energy loss, and time-of-flight measurements. A limit excluding pair production of stable fourth-generation charged leptons and stable mirror fermions with masses between the muon mass and 36.3 GeV/c2 is set at the 95% confidence level. Pair production of stable supersymmetric scalar leptons with masses between the muon mass and 32.6 GeV/c2 is also excluded. © 1990 The American Physical Society.
Published: 1990

24. Search for nonminimal neutral Higgs bosons from Z-boson decays

Author: S. Komamiya, G. S. Abrams, C. E. Adolphsen, D. Averill, J. Ballam, B. C. Barish, T. Barklow, B. A. Barnett, J. Bartelt, S. Bethke, D. Blockus, G. Bonvicini, A. Boyarski, B. Brabson, A. Breakstone, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, D. E. Dorfan, J. M. Dorfan, D. C. Drewer, R. Elia, G. J. Feldman, D. Fernandes, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, C. Gatto, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Grindhammer, P. Grosse-Wiesmann, G. Hanson, R. Harr, B. Harral, F. A. Harris, C. M. Hawkes, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, R. G. Jacobsen, J. A. Jaros, C. K. Jung, J. A. Kadyk, J. Kent, M. King, S. R. Klein, D. S. Koetke, W. Koska, L. A. Kowalski, W. Kozanecki, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, R. R. Larsen, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. Lüth, J. A. McKenna, J. A. J. Matthews, T. Mattison, B. D. Milliken, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O’Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, F. Perrier, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, K. Riles, F. R. Rouse, D. R. Rust, H. F. W. Sadronzinski, M. W. Schaad, B. A. Schumm, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, R. Van Kooten, P. Voruganti, S. R. Wagner, S. Watson, P. Weber, A. Weigend, A. J. Weinstein, A. J. Weir, E. Wicklund, M. Woods, D. Y. Wu, M. Yurko, C. Zaccardelli, and C. von Zanthier
Subjects: Physics, Particle physics, Annihilation, Computer Science::Information Retrieval, High Energy Physics::Phenomenology, General Physics and Astronomy, Elementary particle, Coupling (probability), Particle identification, law.invention, Particle decay, law, Higgs boson, High Energy Physics::Experiment, Collider, Boson
Abstract: Using the Mark II detector at the SLAC Linear Collider, we search for decays of the {ital Z} boson to a pair of nonminimal Higgs bosons ({ital Z}{r arrow}{ital H}{sub {ital s}}{sup 0}{ital H}{sub {ital p}}{sup 0}), where one of them is relatively light ({approx lt}10 GeV). We find no evidence for these decays and we obtain limits on the {ital ZH}{sub {ital s}}{sup 0}{ital H}{sub {ital p}}{sup 0} coupling as a function of the Higgs-boson masses.
Published: 1990

25. Search for doubly charged Higgs scalars in Z decay

Author: M. Swartz, G. S. Abrams, C. E. Adolphsen, D. Averill, J. Ballam, B. C. Barish, T. Barklow, B. A. Barnett, J. Bartelt, S. Bethke, D. Blockus, G. Bonvicini, A. Boyarski, B. Brabson, A. Breakstone, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, D. E. Dorfan, J. M. Dorfan, D. C. Drewer, R. Elia, G. J. Feldman, D. Fernandes, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, C. Gatto, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Grindhammer, P. Grosse-Wiesmann, G. Hanson, R. Harr, B. Harral, F. A. Harris, C. M. Hawkes, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, R. G. Jacobsen, J. A. Jaros, C. K. Jung, J. A. Kadyk, J. Kent, M. King, S. R. Klein, D. S. Koetke, S. Komamiya, W. Koska, L. A. Kowalski, W. Kozanecki, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, R. R. Larsen, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. Lüth, J. A. McKenna, J. A. J. Matthews, T. Mattison, B. D. Milliken, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O’Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, F. Perrier, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, K. Riles, F. R. Rouse, D. R. Rust, H. F. W. Sadrozinski, M. W. Schaad, B. A. Schumm, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, R. Thun, G. H. Trilling, R. Van Kooten, P. Voruganti, S. R. Wagner, S. Watson, P. Weber, A. Weigend, A. J. Weinstein, A. J. Weir, E. Wicklund, M. Woods, D. Y. Wu, M. Yurko, C. Zaccardelli, and C. von Zanthier
Subjects: Physics, Particle physics, Annihilation, Computer Science::Information Retrieval, High Energy Physics::Phenomenology, General Physics and Astronomy, Elementary particle, Coupling (probability), Particle identification, law.invention, Nuclear physics, Particle decay, law, Higgs boson, High Energy Physics::Experiment, Collider, Boson
Abstract: We describe a search for the decay of the {ital Z} boson into pairs of doubly charged Higgs bosons with the Mark II detector operating at the SLAC Linear Collider. Each Higgs boson is assumed to decay into a same-sign leptonic pair. No event candidates are found in a sample of 528 {ital Z} decays. At the 95% confidence level, this result excludes the region of leptonic coupling {ital g}{sub {ital l}{ital l}}{gt}3{times}10{sup {minus}7} and Higgs-boson mass 6.5{lt}{ital M}{sub {ital H}}{lt}36.5 GeV/{ital c}{sup 2} for isotriplet (left-handed) Higgs bosons. Isosinglet (right-handed) Higgs bosons are excluded in the same {ital g}{sub {ital l}{ital l}} interval and in the mass interval 7.3{lt}{ital M}{sub {ital H}}{lt}34.3 GeV/{ital c}{sup 2}.
Published: 1990

26. Search for decays of the Z to unstable neutral leptons with mass between 2.5 and 22 GeV

Author: P. R. Burchat, M. King, G. S. Abrams, C. E. Adolphsen, D. Averill, J. Ballam, B. C. Barish, T. Barklow, B. A. Barnett, J. Bartelt, S. Bethke, D. Blockus, G. Bonvicini, A. Boyarski, B. Brabson, A. Breakstone, F. Bulos, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, D. E. Dorfan, J. M. Dorfan, D. C. Drewer, R. Elia, G. J. Feldman, D. Fernandes, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, C. Gatto, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Grindhammer, P. Grosse-Wiesmann, G. Hanson, R. Harr, B. Harral, F. A. Harris, C. M. Hawkes, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, R. G. Jacobsen, J. A. Jaros, C. K. Jung, J. A. Kadyk, J. Kent, S. R. Klein, D. S. Koetke, S. Komamiya, W. Koska, L. A. Kowalski, W. Kozanecki, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, R. R. Larsen, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. Lüth, J. A. McKenna, J. A. J. Matthews, T. Mattison, B. D. Milliken, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O'Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, F. Perrier, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, K. Riles, F. R. Rouse, D. R. Rust, H. F. W. Sadrozinski, M. W. Schaad, B. A. Schumm, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, R. Van Kooten, P. Voruganti, S. R. Wagner, S. Watson, P. Weber, A. Weigend, A. J. Weinstein, A. J. Weir, E. Wicklund, M. Woods, D. Y. Wu, M. Yurko, C. Zaccardelli, and C. von Zanthier
Subjects: Physics, Particle physics, Electron–positron annihilation, Dirac (video compression format), Charged particle, law.invention, Nuclear physics, law, High Energy Physics::Experiment, Neutral vector, Neutrino, Collider, Lepton, Boson
Abstract: Using the sample of neutral vector bosons (Z's) produced at the SLAC Linear Collider and detected with the Mark II detector, we search for the decay of the Z to a pair of particles, one of which decays to two charged particles. The observed number of Z decays with this signature excludes, at a confidence level greater than 95%, the decay of the Z to a pair of fourth-generation Dirac neutrinos with mass between 2.5 and 22 GeV, a decay length less than about 1 cm, and coupling to any of the first three generations of charged leptons. This is the first time the existence of such a lepton coupling to the ± has been excluded by a direct search. © 1990 The American Physical Society.
Published: 1990

27. Search for long-lived massive neutrinos in Z decays

Author: C. K. Jung, R. Van Kooten, G. S. Abrams, C. E. Adolphsen, D. Averill, J. Ballam, B. C. Barish, T. Barklow, B. A. Barnett, J. Bartelt, S. Bethke, D. Blockus, G. Bonvicini, A. Boyarski, B. Brabson, A. Breakstone, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, D. E. Dorfan, J. M. Dorfan, D. C. Drewer, R. Elia, G. J. Feldman, D. Fernandes, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, C. Gatto, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Grindhammer, P. Grosse-Wiesmann, G. Hanson, R. Harr, B. Harral, F. A. Harris, C. M. Hawkes, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, R. G. Jacobsen, J. A. Jaros, J. A. Kadyk, J. Kent, M. King, S. R. Klein, D. S. Koetke, S. Komamiya, W. Koska, L. A. Kowalski, W. Kozanecki, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, R. R. Larsen, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. Lüth, J. A. McKenna, J. A. J. Matthews, T. Mattison, B. D. Milliken, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O’Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, F. Perrier, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, K. Riles, F. R. Rouse, D. R. Rust, H. F. W. Sadrozinski, M. W. Schaad, B. A. Schumm, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, P. Voruganti, S. R. Wagner, S. Watson, P. Weber, A. Weigend, A. J. Weinstein, A. J. Weir, E. Wicklund, M. Woods, D. Y. Wu, M. Yurko, C. Zaccardelli, and C. von Zanthier
Subjects: Nuclear physics, Physics, Massless particle, Particle physics, Annihilation, General Physics and Astronomy, High Energy Physics::Experiment, Elementary particle, Fermion, Neutrino, Particle identification, Boson, Lepton
Abstract: We search for events in the Mark II detector at SLAC Linear Collider with the topology of a {ital Z} boson decaying into a pair of long-lived massive particles. No events that are consistent with the search hypothesis are found. Interpreting the long-lived particle as a sequential Dirac neutrino {nu}{sub 4} of the fourth generation, we exclude at the 95% confidence level a significant range of mixing-matrix elements of {nu}{sub 4} to other-generation neutrinos for a {nu}{sub 4} mass from 10 to 43 GeV/{ital c}{sup 2}.
Published: 1990

28. Measurement ofZdecays into lepton pairs

Author: G. S. Abrams, C. E. Adolphsen, D. Averill, J. Ballam, B. C. Barish, T. Barklow, B. A. Barnett, J. Bartelt, S. Bethke, D. Blockus, G. Bonvicini, A. Boyarski, B. Brabson, A. Breakstone, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, D. E. Dorfan, J. M. Dorfan, D. C. Drewer, R. Elia, G. J. Feldman, D. Fernandes, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Grindhammer, P. Grosse-Wiesmann, G. Hanson, R. Harr, B. Harral, F. A. Harris, C. M. Hawkes, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, R. G. Jacobsen, J. A. Jaros, C. K. Jung, J. A. Kadyk, J. Kent, M. King, S. R. Klein, D. S. Koetke, S. Komamiya, W. Koska, L. A. Kowalski, W. Kozanecki, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, R. R. Larsen, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. Lüth, J. A. McKenna, J. A. J. Matthews, T. Mattison, B. D. Milliken, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O’Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, F. Perrier, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, K. Riles, F. R. Rouse, D. R. Rust, H. F. W. Sadrozinski, M. W. Schaad, B. A. Schumm, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, R. Van Kooten, P. Voruganti, S. R. Wagner, S. Watson, P. Weber, A. Weigend, A. J. Weinstein, A. J. Weir, E. Wicklund, M. Woods, D. Y. Wu, M. Yurko, C. Zaccardelli, and C. von Zanthier
Subjects: Physics, Nuclear physics, Particle decay, Particle physics, Muon, Branching fraction, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle, Lepton, Boson
Abstract: We present measurements by the Mark II experiment of the ratios of the leptonic partial widths of the Z boson to the hadronic partial width. The results are Γ_(ee)/Γ_(had)=0.037_(-0.012^()+0.016),Γ_(µµ)/Γ_(had)=0.053-_(0.015)^(+0.020), and Γ_(ττ)/Γ_(had)=0.066_(-0.017)^(+0.021), in good agreement with the standard-model prediction of 0.048. From the average leptonic width result, Γ_(ll)/Γ_(had)=0.053_(-0.009)^(+0.010), we derive Γ_(had)=1.56_(-0.24)^(+0.28) GeV. We find for the vector coupling constants of the tau and muon v_τ^2=0.31±0.31_(-0.30)^(+0.43) and v_μ^2=0.05±0.30_(-0.23)^(+0.34).
Published: 1989
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29. The Mark II detector for the SLC

Author: M. Kuhlen, F. Bulos, S. R. Klein, B. A. Barnett, C. Boswell, Z. Li, B. D. Milliken, M. Swartz, P. D. Dauncey, B. B. Brabson, A. Snyder, J. Dorfan, P. Voruganti, A. Petersen, Barry C. Barish, J. A. J. Matthews, R. Pitthan, R. Van Kooten, C. K. Jung, I. Juricic, M. Jaffre, G. H. Trilling, K. Braune, Mark E. Nelson, M. Chmeissani, R. Harr, G. S. Abrams, R. R. Larsen, A. M. Boyarski, R. P. Thun, Ryszard Stroynowski, F. Perrier, Jordan Nash, D. Fujino, A. Seiden, J Perl, J. Haggerty, Giorgio Gratta, Ballam J, F. Butler, B.A. Schumm, J. A. Jaros, J. G. Smith, Averill D, P. Rankin, L. Müller, S. Weisz, M. Yurko, J. W. Chapman, Adolphsen Ce, G. Lynch, S. O. Holmgren, A. Green, A. S. Schwarz, C. Zaccardelli, Hartmut Sadrozinski, Sherwood Parker, Clemens A. Heusch, M. L. Perl, C. von Zanthier, J. M. Brom, Walter R. Innes, J. Boyer, M. Hoenk, D. P. Stoker, King M, A. Weigend, K. Riles, Carl W. Akerlof, William T. Ford, Kenneth G. Hayes, Jacobsen Rg, Field Rc, Fordham C, W. Koska, A. J. Weir, Hinshaw Da, James P. Alexander, D. Hutchinson, C. Gatto, W. N. Murray, L. Labarga, F. A. Harris, D.P. Coupal, R. Tschirhart, Timothy Barklow, C.T. Munger, Stephen Robert Wagner, K. C. Moffeit, Alan Litke, Hearty C, M. Woods, J.F. Kral, D. L. Burke, Cords D, Michael Levi, L.A. Kowalski, Darien Wood, S. Vejcik, Drewer Dc, C.M. Hawkes, D.S. Koetke, R. Frey, J. A. McKenna, T. Glanzman, K. O'Shaughnessy, C. W. Peck, M. Alvarez, Hong Sj, D. Nitz, D. Y. Wu, S. Komamiya, Grosse-Wiesmann P, D. Blockus, J. Hylen, Harral B, E. Wicklund, A. J. Lankford, P.S. Drell, A. Koide, P. Weber, John E. Bartelt, Patricia R. Burchat, DeStaebler Hc, W. De Boer, G. Wormser, A. Breakstone, Frank C. Porter, W. B. Schmidke, S. L. White, E. Fernandez, Gero E, L. Koepke, M. Turala, G. J. Feldman, Robert E. Wright, K. K. Gan, D. Herrup, R. C. Wolf, D. E. Dorfan, H. O. Ogren, G. Bonvicini, Richard E. Taylor, George Gidal, F. Rouse, Fernandes D, A. R. Baden, Jeffrey Richman, A. J. Weinstein, M. Petradza, R. A. Ong, G. Hanson, F. Calviño, H. Veltman, W. Kozanecki, V. Luth, X. Gong, J.J. Gomez Cadenas, T. Himel, J. A. Kadyk, R. J. Cence, M. W. Schaad, E. Soderstrom, Thomas S. Mattison, D. Karlen, J. Kent, J. Fay, D. R. Rust, S. Watson, and Gerson Goldhaber
Subjects: Physics, Nuclear and High Energy Physics, Luminosity (scattering theory), Physics::Instrumentation and Detectors, Detector, law.invention, Nuclear physics, Data acquisition, Electromagnetic calorimeter, law, Electromagnetic coil, Measuring instrument, Physics::Accelerator Physics, High Energy Physics::Experiment, Collider, Instrumentation, Storage ring
Abstract: The Mark II detector has been upgraded in preparation for its role as the first detector to take data at the Stanford Linear Collider. The new detector components include the central drift chamber, the time-of-flight system, the coil, the endcap electromagnetic calorimeters and the beam energy and luminosity measuring devices. There have also been improvements in detector hermeticity. All of the major components were installed for a test run at the PEP storage ring (√s = 29 GeV) in 1985. This paper describes the upgraded detector, including its trigger and data acquisition systems, and gives performance figures for its components. Future improvements are also discussed.
Published: 1989
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30. Search for B-decay to Higgs bosons for Higgs boson masses between 50 and 210 MeV/c2

Author: Abraham Seiden, George H. Trilling, D. Nitz, D. Y. Wu, B. D. Milliken, A. S. Schwarz, Gerson Goldhaber, J. Dorfan, P. Voruganti, J. Hylen, R. J. Hollebeek, J. M. Brom, E. Wicklund, A. J. Lankford, Clemens A. Heusch, K. K. Gan, D. I. Meyer, N. S. Lockyer, R. Van Kooten, D. Herrup, A. Petersen, P. Weber, M. Jaffre, S. L. White, Patricia R. Burchat, J. A. Kadyk, A. M. Boyarski, D. Hutchinson, J. A. J. Matthews, E. Soderstrom, F. Butler, Jordan Nash, G. J. Feldman, S. R. Klein, M. S. Gold, S. Weisz, P. Rankin, F. Calviño, B. B. Brabson, K. O'Shaughnessy, C. W. Peck, W. N. Murray, F. Bulos, H. Veltman, A. Breakstone, H. O. Ogren, Grosse-Wiesmann P, Darien Wood, K. Riles, W. Kozanecki, Fordham C, George Gidal, Carl W. Akerlof, Burton Richter, G. Bonvicini, D. Blockus, R. Frey, V. Luth, M. Petradza, R. A. Ong, W. Koska, Frank C. Porter, W. B. Schmidke, J. R. Smith, D. P. Stoker, G. Hanson, Cence Rj, D. L. Burke, A.J. Weinstein, T. Himel, A. J. Weir, D. Amidel, T. Schaad, M. Alvarez, Timothy Barklow, R. Harr, Alan Litke, Adolphsen Ce, J. Haggerty, G. S. Abrams, Cords D, Michael Levi, J. M. Yelton, H. Schellman, C.M. Hawkes, A. R. Baden, D. E. Dorfan, L. Müller, J. W. Chapman, F.A. Harris, R. R. Larsen, Ryszard Stroynowski, D. Fujino, H. F.W. Sadrozinski, T. Schalk, J.P. Alexander, R. Tschirhart, William T. Ford, P. C. Rowson, Glanzman T, J. Boyer, B. W. Leclaire, Sherwood Parker, A. Snyder, Mark E. Nelson, B. A. Barnett, L. Gladney, B. C. Barish, I. Juricic, D. R. Rust, R. P. Thun, Bartelt J, J. Kent, Field Rc, P. D. Sheldon, P.S. Drell, D. Karlen, DeStaebler Hc, J. A. Jaros, M. L. Perl, Walter R. Innes, Kenneth G. Hayes, E. Fernandez, D.P. Coupal, Stephen Robert Wagner, and K. C. Moffeit
Subjects: Physics, Nuclear and High Energy Physics, Gauge boson, Particle physics, High Energy Physics::Phenomenology, Higgs sector, Vector boson, Standard Model, Nuclear physics, symbols.namesake, Higgs field, symbols, Higgs boson, High Energy Physics::Experiment, Higgs mechanism, Boson
Abstract: We use data from the Mark II experiment at PEP to search for the process B→h 0 X for m h 0 between 50 and 210 MeV/ c 2 . No evidence for the Higgs boson is seen in this mass range. The limit obtained rules out the standard Higgs boson for masses between 70 and 210 MeV/ c 2 and significantly constrains extensions of the Higgs sector.
Published: 1989
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31. Measurements ofZ-boson resonance parameters ine+e−annihilation

Author: G. S. Abrams, C. E. Adolphsen, D. Averill, J. Ballam, B. C. Barish, T. Barklow, B. A. Barnett, J. Bartelt, S. Bethke, D. Blockus, G. Bonvicini, A. Boyarski, B. Brabson, A. Breakstone, J. M. Brom, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, D. E. Dorfan, J. M. Dorfan, D. C. Drewer, R. Elia, G. J. Feldman, D. Fernandes, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Grindhammer, P. Grosse-Wiesmann, G. Hanson, R. Harr, B. Harral, F. A. Harris, C. M. Hawkes, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, R. G. Jacobsen, J. A. Jaros, C. K. Jung, J. A. Kadyk, J. Kent, M. King, S. R. Klein, D. S. Koetke, S. Komamiya, W. Koska, L. A. Kowalski, W. Kozanecki, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, R. R. Larsen, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. Lüth, J. A. McKenna, J. A. J. Matthews, T. Mattison, B. D. Milliken, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O’Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, F. Perrier, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, K. Riles, F. R. Rouse, D. R. Rust, H. F. W. Sadrozinski, M. W. Schaad, B. A. Schumm, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, R. Van Kooten, P. Voruganti, S. R. Wagner, S. Watson, P. Weber, A. Weigend, A. J. Weinstein, A. J. Weir, E. Wicklund, M. Woods, D. Y. Wu, M. Yurko, C. Zaccardelli, and C. von Zanthier
Subjects: Physics, Particle physics, Annihilation, Muon, Electron–positron annihilation, General Physics and Astronomy, Astrophysics::Cosmology and Extragalactic Astrophysics, Resonance (particle physics), Standard Model, Nuclear physics, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino, Nuclear Experiment, Lepton, Boson
Abstract: We have measured the mass of the Z boson to be 91.14±0.12 GeV/c^2, and its width to be 2.42-0.35+0.45 GeV. If we constrain the visible width to its standard-model value, we find the partial width to invisible decay modes to be 0.46±0.10 GeV, corresponding to 2.8±0.6 neutrino species, with a 95%-confidence-level upper limit of 3.9.
Published: 1989
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32. Initial measurements ofZ-boson resonance parameters ine+e−annihilation

Author: G. S. Abrams, C. E. Adolphsen, R. Aleksan, J. P. Alexander, M. A. Allen, W. B. Atwood, D. Averill, J. Ballam, P. Bambade, B. C. Barish, T. Barklow, B. A. Barnett, J. Bartelt, S. Bethke, D. Blockus, W. de Boer, G. Bonvicini, A. Boyarski, B. Brabson, A. Breakstone, M. Breidenbach, J. M. Brom, J. L. Brown, K. L. Brown, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, J. Clendenin, D. Cords, D. P. Coupal, P. Dauncey, N. R. Dean, H. C. DeStaebler, D. E. Dorfan, J. M. Dorfan, P. S. Drell, D. C. Drewer, F. Dydak, S. Ecklund, R. Elia, R. A. Erickson, J. Fay, G. J. Feldman, D. Fernandes, R. C. Field, T. H. Fieguth, G. E. Fischer, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, C. Gatto, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Grindhammer, P. Grosse-Wiesmann, G. Hanson, R. Harr, B. Harral, F. A. Harris, C. M. Hawkes, K. Hayes, C. Hearty, D. Herrup, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S.-O. Holmgren, S. J. Hong, D. Hutchinson, A. Hutton, J. Hylen, W. R. Innes, R. G. Jacobsen, M. Jaffre, J. A. Jaros, R. K. Jobe, C. K. Jung, J. A. Kadyk, D. Karlen, J. Kent, M. King, S. R. Klein, D. S. Koetke, S. Komamiya, W. Koska, L. A. Kowalski, W. Kozanecki, J. F. Kral, M. Kuhlen, A. V. Kulikov, L. Labarga, A. J. Lankford, R. R. Larsen, F. Le Diberder, M. E. Levi, A. M. Litke, T. Lohse, V. Lüth, G. R. Lynch, J. A. McKenna, J. A. J. Matthews, T. Mattison, B. D. Milliken, K. C. Moffeit, C. T. Munger, J. J. Murray, W. N. Murray, J. Nash, H. Ogren, R. A. Ong, K. F. O’Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, F. Perrier, A. Petersen, M. Petradza, N. Phinney, R. Pitthan, F. C. Porter, P. Rankin, J. R. Rees, J. D. Richman, K. Riles, L. Rivkin, M. C. Ross, F. R. Rouse, D. R. Rust, H. F. W. Sadrozinski, M. W. Schaad, T. L. Schalk, B. A. Schumm, A. S. Schwarz, J. T. Seeman, A. Seiden, J. C. Sheppard, J. G. Smith, A. Snyder, E. Soderstrom, R. Stiening, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, N. Toge, G. H. Trilling, R. Van Kooten, P. Voruganti, S. R. Wagner, S. Watson, P. Weber, A. Weigend, A. J. Weinstein, A. J. Weir, S. L. White, E. Wicklund, R. C. Wolf, D. R. Wood, M. Woods, G. Wormser, R. Wright, D. Y. Wu, M. Yurko, C. Zaccardelli, and C. von Zanthier
Subjects: Physics, Particle physics, Partial width, Annihilation, Electron–positron annihilation, General Physics and Astronomy, Weinberg angle, Astrophysics::Cosmology and Extragalactic Astrophysics, Resonance (particle physics), Nuclear physics, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino, Nuclear Experiment, Astrophysics::Galaxy Astrophysics
Abstract: We have measured the mass of the Z boson to be 91.11±0.23 GeV/c^2, and its width to be 1.61-0.43+0.60 GeV. If we constrain the visible width to its standard-model value, we find the partial width to invisible decay modes to be 0.62±0.23 GeV, corresponding to 3.8±1.4 neutrino species.
Published: 1989
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33. First measurements of hadronic decays of the Z boson

Author: G. S. Abrams, C. E. Adolphsen, R. Aleksan, J. P. Alexander, D. Averill, J. Ballam, B. C. Barish, T. Barklow, B. A. Barnett, J. Bartelt, S. Bethke, D. Blockus, W. de Boer, G. Bonvicini, A. Boyarski, B. Brabson, A. Breakstone, J. M. Brom, F. Bulos, P. R. Burchat, D. L. Burke, R. J. Cence, J. Chapman, M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. DeStaebler, D. E. Dorfan, J. M. Dorfan, P. S. Drell, D. C. Drewer, R. Elia, J. Fay, G. J. Feldman, D. Fernandes, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J. Gomez Cadenas, G. Gratta, G. Grindhammer, P. Grosse-Wiesmann, G. Hanson, R. Harr, B. Harral, F. A. Harris, C. M. Hawkes, K. Hayes, C. Hearty, D. Herrup, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S.-O. Holmgren, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, R. G. Jacobsen, M. Jaffre, J. A. Jaros, C. K. Jung, J. A. Kadyk, D. Karlen, J. Kent, M. King, S. R. Klein, D. S. Koetke, S. Komamiya, W. Koska, L. A. Kowalski, W. Kozanecki, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, R. R. Larsen, F. Le Diberder, M. E. Levi, A. M. Litke, V. Lüth, G. R. Lynch, J. A. McKenna, J. A. J. Matthews, T. Mattison, B. D. Milliken, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, D. Nitz, H. Ogren, R. A. Ong, K. F. O’Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, F. Perrier, A. Petersen, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, J. D. Richman, K. Riles, F. R. Rouse, D. R. Rust, H. F. W. Sadrozinski, M. W. Schaad, T. L. Schalk, B. A. Schumm, A. S. Schwarz, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, R. Van Kooten, P. Voruganti, S. R. Wagner, S. Watson, P. Weber, A. Weigend, A. J. Weinstein, A. J. Weir, E. Wicklund, R. C. Wolf, D. R. Wood, M. Woods, G. Wormser, R. Wright, D. Y. Wu, M. Yurko, C. Zaccardelli, and C. von Zanthier
Subjects: Quantum chromodynamics, Physics, Particle physics, Electron–positron annihilation, Hadron, High Energy Physics::Phenomenology, General Physics and Astronomy, Elementary particle, Parton, Nuclear physics, Particle decay, High Energy Physics::Experiment, Quantum field theory, Boson
Abstract: We have observed hadronic final states produced in the decays of Z bosons. In order to study the parton structure of these events, we compare the distributions in sphericity, thurst, aplanarity, and number of jets to the predictions of several QCD-based models and to data from lower energies. The data and models agree within the present statistical precision.
Published: 1989

34. Eosinophilic granuloma of the lung

Author: S B, BURROWS, W L, WALLS, J C, CLARKE, and W N, MURRAY
Subjects: Eosinophilic Granuloma, Lung Diseases, Humans, Lung, Medical Records
Published: 1961

35. 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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35 results on '"W. N. Murray"'

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

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

3. Measurement of the charged multiplicity of events containing bottom hadrons atEc.m.=91GeV

4. Measurement of thebb¯fraction in hadronicZ0decays with precision vertex detectors

5. Searches for supersymmetric particles produced inZ-boson decay

6. Measurements of charged-particle inclusive distributions in hadronic decays of theZboson

7. Measurement of thebb¯fraction in hadronicZdecays

8. Jet shapes at HERA

9. High Q(2) events in ep collisions

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

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

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

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

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

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

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

17. Diffractive measurements from ZEUS

18. Diffractive production of charm and jets at HERA

19. Fragmentation functions at ZEUS

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

21. BEAM TESTS OF THE ZEUS BARREL CALORIMETER

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

23. Direct search for pair production of heavy stable charged particles in Z decays

24. Search for nonminimal neutral Higgs bosons from Z-boson decays

25. Search for doubly charged Higgs scalars in Z decay

26. Search for decays of the Z to unstable neutral leptons with mass between 2.5 and 22 GeV

27. Search for long-lived massive neutrinos in Z decays

28. Measurement ofZdecays into lepton pairs

29. The Mark II detector for the SLC

30. Search for B-decay to Higgs bosons for Higgs boson masses between 50 and 210 MeV/c2

31. Measurements ofZ-boson resonance parameters ine+e−annihilation

32. Initial measurements ofZ-boson resonance parameters ine+e−annihilation

33. First measurements of hadronic decays of the Z boson

34. Eosinophilic granuloma of the lung

35. Diffractive dijet cross sections in photoproduction at HERA

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35 results on '"W. N. Murray"'

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