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1. EXTRACTION OF THE GLUON DENSITY OF THE PROTON AT X

Author

M. Derrick, D. Krakauer, S. Magill, B. Musgrave, J. Repond, J. Schlereth, R. Stanek, R.L. Talaga, J. Thron, F. Arzarello, R. Ayad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, F. Ciralli, A. Contin, S. D'Auria, F. Frasconi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, C. Nemoz, F. Palmonari, A. Polini, G. Sartorelli, R. Timellini, Y. Zamora Garcia, A. Zichichi, A. Bargende, J. Crittenden, K. Desch, B. Diekmann, T. Doeker, M. Eckert, L. Feld, A. Frey, M. Geerts, G. Geitz, M. Grothe, H. Hartmann, D. Haun, K. Heinloth, E. Hilger, H.-P. Jakob, U.F. Katz, S.M. Mari, A. Mass, S. Mengel, J. Mollen, E. Paul, Ch. Rembser, R. Schattevoy, D. Schramm, J. Stamm, R. Wedemeyer, S. Campbell-Robson, A. Cassidy, N. Dyce, B. Foster, S. George, R. Gilmore, G.P. Heath, H.F. Heath, T.J. Llewellyn, C.J.S. Morgado, D.J.P. Norman, J.A. O'Mara, R.J. Tapper, S.S. Wilson, R. Yoshida, R.R. Rau, M. Arneodo, L. Iannotti, M. Schioppa, G. Susinno, A. Bernstein, A. Caldwell, J.A. Parsons, S. Ritz, F. Sciulli, P.B. Straub, L. Wai, S. Yang, P. Borzemski, J. Chwastowski, A. Eskreys, K. Piotrzkowski, M. Zachara, L. Zawiejski, L. Adamczyk, B. Bednarek, K. Eskreys, K. Jelén, D. Kisielewska, T. Kowalski, E. Rulikowska-Zarȩbska, L. Suszycki, J. Zaja̧c, T. Kȩdzierski, A. Kotański, M. Przybycień, L.A.T. Bauerdick, U. Behrens, J.K. Bienlein, S. Böttcher, C. Coldewey, G. Drews, M. Flasiński, D.J. Gilkinson, P. Göttlicher, B. Gutjahr, T. Haas, W. Hain, D. Hasell, H. Heβling, H. Hultschig, Y. Iga, P. Joos, M. Kasemann, R. Klanner, W. Koch, L. Köpke, U. Kötz, H. Kowalski, W. Kröger, J. Krüger, J. Labs, A. Ladage, B. Löhr, M. Löwe, D. Lüke, O. Mańczak, J.S.T. Ng, S. Nickel, D. Notz, K. Ohrenberg, M. Roco, M. Rohde, J. Roldán, U. Schneekloth, W. Schulz, F. Selonke, E. Stiliaris, T. Voβ, D. Westphal, G. Wolf, C. Youngman, H.J. Grabosch, A. Leich, A. Meyer, C. Rethfeldt, S. Schlenstedt, G. Barbagli, P. Pelfer, G. Anzivino, G. Maccarrone, S. De Pasquale, S. Qian, L. Votano, A. Bamberger, A. Freidhof, T. Poser, S. Söldner-Rembold, J. Schroeder, G. Theisen, T. Trefzger, N.H. Brook, P.J. Bussey, A.T. Doyle, I. Fleck, V.A. Jamieson, D.H. Saxon, M.L. Utley, A.S. Wilson, A. Dannemann, U. Holm, D. Horstmann, H. Kammerlocher, B. Krebs, T. Neumann, R. Sinkus, K. Wick, E. Badura, B.D. Burow, A. Fürtjes, L. Hagge, E. Lohrmann, J. Mainusch, J. Milewski, M. Nakahata, N. Pavel, G. Poelz, W. Schott, J. Terron, F. Zetsche, T.C. Bacon, R. Beuselinck, I. Butterworth, E. Gallo, V.L. Harris, B.H. Hung, K.R. Long, D.B. Miller, P.P.O. Morawitz, A. Prinias, J.K. Sedgbeer, A.F. Whitfield, U. Mallik, E. McCliment, M.Z. Wang, S.M. Wang, J.T. Wu, Y. Zhang, P. Cloth, D. Filges, S.H. An, S.M. Hong, S.W. Nam, S.K. Park, M.H. Suh, S.H. Yon, R. Imlay, S. Kartik, H.-J. Kim, R.R. McNeil, W. Metcalf, V.K. Nadendla, F. Barreiro, G. Cases, R. Graciani, J.M. Hernández, L. Hervás, L. Labarga, J. del Peso, J. Puga, J.F. de Trocóniz, F. Ikraiam, J.K. Mayer, G.R. Smith, F. Corriveau, D.S. Hanna, J. Hartmann, L.W. Hung, J.N. Lim, C.G. Matthews, P.M. Patel, L.E. Sinclair, D.G. Stairs, M. St.Laurent, R. Ullmann, G. Zacek, V. Bashkirov, B.A. Dolgoshein, A. Stifutkin, G.L. Bashindzhagyan, P.F. Ermolov, L.K. Gladilin, Y.A. Golubkov, V.D. Kobrin, V.A. Kuzmin, A.S. Proskuryakov, A.A. Savin, L.M. Shcheglova, A.N. Solomin, N.P. Zotov, S. Bentvelsen, M. Botje, F. Chlebana, A. Dake, J. Engelen, P. de Jong, M. de Kamps, P. Kooijman, A. Kruse, V. O'Dell, A. Tenner, H. Tiecke, W. Verkerke, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg, D. Acosta, B. Bylsma, L.S. Durkin, K. Honscheid, C. Li, T.Y. Ling, K.W. McLean, W.N. Murray, I.H. Park, T.A. Romanowski, R. Seidlein, D.S. Bailey, G.A. Blair, A. Byrne, R.J. Cashmore, A.M. Cooper-Sarkar, D. Daniels, R.C.E. Devenish, N. Harnew, M. Lancaster, P.E. Luffman, L. Lindemann, J. McFall, C. Nath, A. Quadt, H. Uijterwaal, R. Walczak, F.F. Wilson, T. Yip, G. Abbiendi, 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, J. Bulmahn, J.M. Butterworth, R.G. Feild, B.Y. Oh, J.J. Whitmore, G. D'Agostini, M. Iori, G. Marini, M. Mattioli, A. Nigro, E. Tassi, J.C. Hart, N.A. McCubbin, K. Prytz, T.P. Shah, T.L. Short, E. Barberis, N. Cartiglia, T. Dubbs, C. Heusch, M. Van Hook, B. Hubbard, W. Lockman, J.T. Rahn, H.F.-W. Sadrozinski, A. Seiden, J. Biltzinger, R.J. Seifert, A.H. Walenta, G. Zech, H. Abramowicz, G. Briskin, S. Dagan, A. Levy, T. Hasegawa, M. Hazumi, T. Ishii, M. Kuze, S. Mine, Y. Nagasawa, T. Nagira, M. Nakao, I. Suzuki, K. Tokushuku, S. Yamada, Y. Yamazaki, M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura, S. Nagayama, Y. Nakamitsu, R. Cirio, M. Costa, M.I. Ferrero, L. Lamberti, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano, M. Dardo, D.C. Bailey, D. Bandyopadhyay, F. Benard, M. Brkic, M.B. Crombie, D.M. Gingrich, G.F. Hartner, K.K. Joo, G.M. Levman, J.F. Martin, R.S. Orr, C.R. Sampson, R.J. Teuscher, C.D. Catterall, T.W. Jones, P.B. Kaziewicz, J.B. Lane, R.L. Saunders, J. Shulman, K. Blankenship, J. Kochocki, B. Lu, L.W. Mo, W. Bogusz, K. Charchuł, a, J. Ciborowski, J. Gajewski, G. Grzelak, M. Kasprzak, M. Krzyżanowski, K. Muchorowski, R.J. Nowak, J.M. Pawlak, T. Tymieniecka, A.K. Wróblewski, J.A. Zakrzewski, A.F. Zarnecki, M. Adamus, Y. Eisenberg, C. Glasman, U. Karshon, D. Revel, A. Shapira, I. Ali, B. Behrens, S. Dasu, C. Fordham, C. Foudas, A. Goussiou, R.J. Loveless, D.D. Reeder, S. Silverstein, W.H. Smith, T. Tsurugai, S. Bhadra, W.R. Frisken, and K.M. Furutani

Subjects
Nuclear and High Energy Physics, Particle physics, Proton, Nuclear physics, INELASTIC MUON SCATTERING, DEUTERON STRUCTURE FUNCTIONS, ZEUS, NUCLEON STRUCTURE FUNCTIONS, HIGH STATISTICS MEASUREMENT, PARTON DISTRIBUTIONS, LEADING ORDER, HIGH Q2, PERTURBATION-THEORY, SCALING VIOLATIONS, PP COLLISIONS, Quantum chromodynamics, Physics, ZEUS (particle detector), Neutral current, Scattering, High Energy Physics::Phenomenology, HERA, Gluon, High Energy Physics::Experiment, Perturbation theory (quantum mechanics)
Abstract

The gluon momentum density xg ( x , Q 2 ) of the proton was extracted at Q 2 = 20 GeV 2 for small values of x between 4 × 10 −4 and 10 −2 from the scaling violations of the proton structure function F 2 measured recently by ZEUS in deep inelastic neutral current ep scattering at HERA. The extraction was performed in two ways. Firstly, using a global NLO fit to the ZEUS data on F 2 at low x constrained by measurementsfrom NMC at larger x ; and secondly using published approximate methods for the solution of the GLAP QCD evolution equations. Consistent results are obtained. A substantial increase of the gluon density is found at small x in comparison with the NMC result obtained at larger values of x .

Published
2016
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2. Observation of hard scattering in photoproduction events with a large rapidity gap at HERA

Author

M. Derrick, D. Krakauer, S. Magill, B. Musgrave, J. Repond, J. Schlereth, R. Stanek, R.L. Talaga, J. Thron, F. Arzarello, R. Ayad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, F. Ciralli, A. Contin, S. D'Auria, F. Frasconi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, C. Nemoz, F. Palmonari, A. Polini, G. Sartorelli, R. Timellini, Y. Zamora Garcia, A. Zichichi, A. Bargende, J. Crittenden, K. Desch, B. Diekmann, T. Doeker, M. Eckert, L. Feld, A. Frey, M. Geerts, G. Geitz, M. Grothe, H. Hartmann, D. Haun, K. Heinloth, E. Hilger, H.-P. Jakob, U.F. Katz, S.M. Mari, A. Mass, S. Mengel, J. Mollen, E. Paul, Ch. Rembser, R. Schattevoy, D. Schramm, J. Stamm, R. Wedemeyer, S. Campbell-Robson, A. Cassidy, N. Dyce, B. Foster, S. George, R. Gilmore, G.P. Heath, H.F. Heath, T.J. Llewellyn, C.J.S. Morgado, D.J.P. Norman, J.A. O'Mara, R.J. Tapper, S.S. Wilson, R. Yoshida, R.R. Rau, M. Arneodo, L. Iannotti, M. Schioppa, G. Susinno, A. Bernstein, A. Caldwell, J.A. Parsons, S. Ritz, F. Sciulli, P.B. Straub, L. Wai, S. Yang, Q. Zhu, P. Borzemski, J. Chwastowski, A. Eskreys, K. Piotrzkowski, M. Zachara, L. Zawiejski, L. Adamczyk, B. Bednarek, K. Eskreys, K. Jeleń, D. Kisielewska, T. Kowalski, E. Rulikowska-Zarȩbska, L. Suszycki, J. Zaja̧c, A. Kotański, M. Przybycień, L.A.T. Bauerdick, U. Behrens, J.K. Bienlein, S. Böttcher, C. Coldewey, G. Drews, M. Flasiński, D.J. Gilkinson, P. Göttlicher, B. Gutjahr, T. Haas, W. Hain, D. Hasell, H. Heßling, H. Hultschig, Y. Iga, P. Joos, M. Kasemann, R. Klanner, W. Koch, L. Köpke, U. Kötz, H. Kowalski, W. Kröger, J. Krüger, J. Labs, A. Ladage, B. Löhr, M. Löwe, D. Lüke, O. Mańczak, J.S.T. Ng, S. Nickel, D. Notz, K. Ohrenberg, M. Roco, M. Rohde, J. Roldán, U. Schneekloth, W. Schulz, F. Selonke, E. Stiliaris, T. Voß, D. Westphal, G. Wolf, C. Youngman, H.J. Grabosch, A. Leich, A. Meyer, C. Rethfeldt, S. Schlenstedt, G. Barbagli, P. Pelfer, G. Anzivino, G. Maccarrone, S. De Pasquale, S. Qian, L. Votano, A. Bamberger, A. Freidhof, T. Poser, S. Söldner-Rembold, J. Schroeder, G. Theisen, T. Trefzger, N.H. Brook, P.J. Bussey, A.T. Doyle, I. Fleck, V.A. Jamieson, D.H. Saxon, M.L. Utley, A.S. Wilson, A. Dannemann, U. Holm, D. Horstmann, H. Kammerlocher, B. Krebs, T. Neumann, R. Sinkus, K. Wick, E. Badura, B.D. Burow, A. Fürtjes, L. Hagge, E. Lohrmann, J. Mainusch, J. Milewski, M. Nakahata, N. Pavel, G. Poelz, W. Schott, J. Terron, F. Zetsche, T.C. Bacon, R. Beuselinck, I. Butterworth, E. Gallo, V.L. Harris, B.H. Hung, K.R. Long, D.B. Miller, P.P.O. Morawitz, A. Prinias, J.K. Sedgbeer, A.F. Whitfield, U. Mallik, E. McCliment, M.Z. Wang, S.M. Wang, J.T. Wu, Y. Zhang, P. Cloth, D. Filges, S.H. An, S.M. Hong, S.W. Nam, S.K. Park, M.H. Suh, S.H. Yon, R. Imlay, S. Kartik, H.-J. Kim, R.R. McNeil, W. Metcalf, V.K. Nadendla, F. Barreiro, G. Cases, R. Graciani, J.M. Hernández, L. Hervás, L. Labarga, J. del Peso, J. Puga, J.F. de Trocóniz, G.R. Smith, F. Corriveau, D.S. Hanna, J. Hartmann, L.W. Hung, J.N. Lim, C.G. Matthews, P.M. Patel, L.E. Sinclair, D.G. Stairs, M.St. Laurent, R. Ullmann, G. Zacek, V. Bashkirov, B.A. Dolgoshein, A. Stifutkin, G.L. Bashindzhagyan, P.F. Ermolov, L.K. Gladilin, Y.A. Golubkov, V.D. Kobrin, V.A. Kuzmin, A.S. Proskuryakov, A.A. Savin, L.M. Shcheglova, A.N. Solomin, N.P. Zotov, S. Bentvelsen, M. Botje, F. Chlebana, A. Dake, J. Engelen, P. de Jong, M. de Kamps, P. Kooijman, A. Kruse, V. O'Dell, A. Tenner, H. Tiecke, W. Verkerke, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg, D. Acosta, B. Bylsma, L.S. Durkin, K. Honscheid, C. Li, T.Y. Ling, K.W. McLean, W.N. Murray, I.H. Park, T.A. Romanowski, R. Seidlein, D.S. Bailey, G.A. Blair, A. Byrne, R.J. Cashmore, A.M. Cooper-Sarkar, D. Daniels, R.C.E. Devenish, N. Harnew, M. Lancaster, P.E. Luffman, L. Lindemann, J. McFall, C. Nath, A. Quadt, H. Uijterwaal, R. Walczak, F.F. Wilson, T. Yip, G. Abbiendi, 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, J. Bulmahn, J.M. Butterworth, R.G. Feild, B.Y. Oh, J.J. Whitmore, G. D'Agostini, M. Iori, G. Marini, M. Mattioli, A. Nigro, E. Tassi, J.C. Hart, N.A. McCubbin, K. Prytz, T.P. Shah, T.L. Short, E. Barberis, N. Cartiglia, T. Dubbs, C. Heusch, M. Van Hook, B. Hubbard, W. Lockman, J.T. Rahn, H.F.-W. Sadrozinski, A. Seiden, J. Biltzinger, R.J. Seifert, A.H. Walenta, G. Zech, H. Abramowicz, G. Briskin, S. Dagan, A. Levy, T. Hasegawa, M. Hazumi, T. Ishii, M. Kuze, S. Mine, Y. Nagasawa, T. Nagira, M. Nakao, I. Suzuki, K. Tokushuku, S. Yamada, Y. Yamazaki, M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura, S. Nagayama, Y. Nakamitsu, R. Cirio, M. Costa, M.I. Ferrero, L. Lamberti, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano, M. Dardo, D.C. Bailey, D. Bandyopadhyay, F. Benard, M. Brkic, M.B. Crombie, D.M. Gingrich, G.F. Hartner, K.K. Joo, G.M. Levman, J.F. Martin, R.S. Orr, C.R. Sampson, R.J. Teuscher, C.D. Catterall, T.W. Jones, P.B. Kaziewicz, J.B. Lane, R.L. Saunders, J. Shulman, K. Blankenship, J. Kochocki, B. Lu, L.W. Mo, W. Bogusz, K. Charchuła, J. Ciborowski, J. Gajewski, G. Grzelak, M. Kasprzak, M. Krzyżanowski, K. Muchorowski, R.J. Nowak, J.M. Pawlak, T. Tymieniecka, A.K. Wróblewski, J.A. Zakrzewski, A.F. Żarnecki, M. Adamus, Y. Eisenberg, C. Glasman, U. Karshon, D. Revel, A. Shapira, I. Ali, B. Behrens, S. Dasu, C. Fordham, C. Foudas, A. Goussiou, R.J. Loveless, D.D. Reeder, S. Silverstein, W.H. Smith, T. Tsurugai, S. Bhadra, W.R. Frisken, K.M. Furutani, and Zeus (IHEF, IoP, FNWI)

Subjects
Nuclear and High Energy Physics, Particle physics, Photon, Proton, Astrophysics::High Energy Astrophysical Phenomena, Hadron, FOS: Physical sciences, Astronomy & Astrophysics, DIFFRACTION, 01 natural sciences, High Energy Physics - Experiment, Physics, Particles & Fields, law.invention, COLLIDER, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics, DESIGN, law, 0103 physical sciences, Rapidity, CALORIMETER, Nuclear Experiment, 010306 general physics, Collider, DETECTOR, Physics, Research Groups and Centres\Physics\Low Temperature Physics, Science & Technology, ZEUS (particle detector), Faculty of Science\Physics, hep-ex, 010308 nuclear & particles physics, Scattering, ZEUS, diffractive scattering, HERA, photoproduction, Nuclear & Particles Physics, POMERON STRUCTURE, Physics, Nuclear, PHOTON, Physical Sciences, JETS, High Energy Physics::Experiment
Abstract

Events with a large rapidity gap and total transverse energy greater than 5 GeV have been observed in quasi-real photoproduction at HERA with the ZEUS detector. The distribution of these events as a function of the $\gamma p$ centre of mass energy is consistent with diffractive scattering. For total transverse energies above 12 GeV, the hadronic final states show predominantly a two-jet structure with each jet having a transverse energy greater than 4 GeV. For the two-jet events, little energy flow is found outside the jets. This observation is consistent with the hard scattering of a quasi-real photon with a colourless object in the proton., Comment: 19 pages, latex, 4 figures appended as uuencoded file

Published
1995
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3. A measurement of σtot(γp) at

Author

Ada Solano, S. Limentani, M. Z. Wang, G.A. Blair, A. Seidman, Stan Bentvelsen, D. Haun, Giuseppe Iacobucci, S. Kartik, Francois Corriveau, A. Kotański, P. Morawitz, S. Kasai, A. Cassidy, M. Nakahata, Marco Schioppa, P. G. Pelfer, S.J.P. Smith, K. U. Pösnecker, J. Nash, U. Schneekloth, T. Neumann, T. Barillari, Y. Eisenberg, M. M. Mobayyen, R. Seidlein, A. Mass, Roberto Casalbuoni, S. Kitamura, P.F. Ermolov, H. F.W. Sadrozinski, A. Shapira, Fernando Barreiro, D. Monaldi, K. Heinloth, R. Casaccia, H. Müsch, P. Cloth, J. Kochocki, Mauro Morandin, Z. Jakubowski, Giuseppe Levi, I. Gialas, R. Imlay, Rosario Nania, S. De Jong, S. Magill, A. Prinias, K. Jelen, Ulf Behrens, Federico Cindolo, H. Kowalski, F. Ciralli, W. Koch, F. J. Sciulli, A. Hofmann, Tadeusz Kowalski, C.J.S. Morgado, A. Freidhof, Michele Arneodo, N.C. Roocroft, S. Kramarczyk, L. W. Hung, J. Engelen, G. Poelz, James Crittenden, A. Dannemann, G. Sartorelli, A Furtjes, F. Gasparini, A. A. Savin, J. F. Labs, L. Suszycki, A. Bargende, W. Dorth, F. Dal Corso, J. Straver, L. Hagge, N. Dyce, Tobias M. Haas, T. Hasegawa, A. Leich, A. Margotti, Roberto Carlin, Shoichi Yamada, R.C.E. Devenish, Debades Bandyopadhyay, D. Revel, A. A. Voronin, T. Ishii, B. Lisowski, T. J. Llewellyn, A. Stopczyński, C. Voci, Silvia Maselli, M. Momayezi, G. Laurenti, G. Barbagli, G. Cara Romeo, E. Tscheslog, S. Nagayama, R. Ayed, R. L. Talaga, S. Bhadra, F. Ikraiam, G. Cases, R. Yoshida, B.D. Burow, I. Butterworth, T. Kȩdzierski, Y. Iga, J. M. Pawlak, A. Vorvolakos, D. McQuillan, A. Zichichi, Matthias Kasemann, R. Timellini, A. Dake, D. Notz, C. Nemoz, K. Muchorowski, N. H. Brook, T.L. Short, R. R. McNeil, Ta Romanowski, Daniele Dominici, R. Wedemeyer, J.D. Prentice, E. Barberis, Samuel Silverstein, K. Charchuła, P. Erhard, Jens Hartmann, T. W. Jones, Anna Goussiou, M. Löwe, R. Loveless, U. Mallik, T. Khatri, J.W. Mitchell, Greg P Heath, L. Chen, Eduardo Ros, R. J. Cashmore, G. L. Bashindzhagyan, R. J. Teuscher, M. Geerts, K. Blankenship, Luis Labarga, J. J. Whitmore, M. Derrick, T. Tymieniecka, Danuta Kisielewska, C.R. Sampson, R. J. Seifert, P.M. Hallam-Baker, H. Dabbous, M. de Kamps, N. Pavel, G. Grzelak, J. F. Martin, P. Kooijman, F. F. Wilson, M. Chiarini, U. Kötz, Vivian O'Dell, H. J. Kim, T. C. Bacon, M. Lomperski, Stefano Maria Mari, R. Gläser, Guenter Wolf, A. Bernstein, Y. Zamora Garcia, A. Francescato, C. Youngman, Hideki Okuno, W. Burkot, R. J. Nowak, S. De Pasquale, J.K. Mayer, S. Schlenstedt, I. Laakso, M. Brkic, J. K. Bienlein, R. Szwed, D. Shaw, P. J. Bussey, S. Qian, G. D'Agostini, Ben Bylsma, B. Lu, J. Milewski, J. Krüger, J. F. de Trocóniz, M. Nuti, J. Schroeder, H. Chaves, Masashi Hazumi, L. Zawiejski, T. Y. Ling, P. de Jong, Q. Lin, Inkyu Park, F. Benard, G. Zech, S. De Curtis, H. Hartmann, Y. Nakamitsu, Katsuo Tokushuku, Giovanni Abbiendi, M.I. Ferrero, R. J. Tapper, Robert Klanner, M. Rohde, N. A. McCubbin, T. S. Yoon, K. Wick, B. Musgrave, I. Fleck, Thomas Trefzger, A.G. Tenner, H.-P. Jakob, H. van der Lugt, Umberto Dosselli, J.B. Lane, E. Paul, David Cussans, Janusz Chwastowski, K. Sugano, Rr Rau, R. Brugnera, L. S. Durkin, J. N. Lim, A. Contin, W. Weihs, D. J. Gilkinson, V. A. Kuzmin, D. C. Bailey, E. A. De Wolf, G. Jahnen, Claudia Glasman, Sridhara Dasu, M. De Giorgi, Halina Abramowicz, K. Stojda, W. Metcalf, F. Turkot, R. Stanek, U. Holm, S. Mengel, J. Mainusch, Gm Levman, B. Gutjahr, Luca Stanco, C. Markou, M. Adamus, G. Marini, B. Löhr, E. Badura, M. Kückes, Np Zotov, A.K. Wróblewski, A. Bamberger, C. Rethfeldt, W. Schott, F. Selonke, E. Hilger, T. Bienz, G. Bruni, S. D'Auria, P. Joos, Cd Catterall, R. Heifetz, F. Arzarello, M. Rost, A. Meyer, B. Foster, F. W. Bullock, Mariusz Flasiński, Luisa Cifarelli, M. Krzyżanowski, A. Byrne, Neville Harnew, J. Roldán, B. Schneider, M. Lancaster, D.D. Reeder, A. Montag, B. Diekmann, B.Y. Oh, E. Rulikowska-Zarȩbska, Krzysztof Piotrzkowski, J.A. Zakrzewski, C. A. Heusch, C. Raine, P. Nylander, J. Leslie, J. Del Peso, T. Watanabe, C. Li, Lucia Votano, E. Lohrmann, Kr Long, C. Fordham, G. Castellini, M. Zachara, H. Kreutzmann, L.E. Sinclair, J. C. Vermeulen, M. Mattioli, R. van Woudenberg, G. Theisen, U. Karshon, Lothar At Bauerdick, T. Woeniger, L. Lamberti, F.S. Chlebana, K.M. Furutani, M.B. Crombie, H. Uijterwaal, P.M. Patel, A.F. Żarnecki, W. Schulz, Luis Hervas, D. Boscherini, W.N. Murray, G. Anzivino, G. Susinno, M. Nakao, P. Borzemski, R. S. Orr, P. B. Straub, E.E. Ronat, B. Behrens, Nicolo Cartiglia, J. Ciborowski, R. Ullmann, S. Yang, V.A. Jamieson, M. Dardo, C. Coldewey, R.S. Gilmore, H.J. Grabosch, B. Krebs, F. Zetsche, J. L. Thron, D. Lüke, T. Poser, M. Bonori, Maurizio Basile, S. Nickel, L. Bellagamba, D. B. Miller, J. Gajewski, T. Massam, J. Biltzinger, A.H. Walenta, H. Hultschig, H. Kammerlocher, B. H. Wiik, John Hart, I. Ali, Wr Frisken, S. Ritz, D. S. Hanna, L.W. Wiggers, Masami Chiba, G. Maccarrone, Klaus Kurt Desch, C. Del Papa, I. McArthur, P. Bruni, Costas Foudas, L.W. Mo, Michele Guida, Jose Repond, W. H. Smith, A. Caldwell, G.G. Stairs, G. Gloth, Mário Costa, U. Contino, T. Tsurugai, E. McCliment, J.C. Giddings, D.M. Gingrich, A. Seiden, F. Frasconi, M. Przybycień, F. Palmonari, S.S. Wilson, D. Zer-Zion, A. T. Doyle, A.M. Khan, R. Schattevoy, G. Bari, J.-L. Schneider, W. Vogel, P. Luffman, K. Eskreys, T.P. Shah, D. H. Saxon, J.S.T. Ng, P. Göttlicher, B. Hubbard, M. Ptacek, Aharon Levy, J.R. Forbes, K.W. McLean, D. Krakauer, A. Ladage, S. Söldner-Rembold, M. Iori, A. Nigro, Y. Nagasawa, A. Dwuraźny, J. Mollen, H.F. Fawcett, E.N. Kuznetsov, O. Mańczak, G. F. Hartner, U. Camerini, A. M. Cooper-Sarkar, S. Dagan, R. Walczak, Yu. A. Golubkov, H. Tiecke, M. Posocco, Geoffrey Smith, Detlef Filges, D. K. Hasell, K. O'Shaughnessy, A. Kruse, J. Shulman, R. Salomon, Juan Terron, M. Kasprzak, P. Giusti, G. Drews, J. A. Parsons, W. Hain, K. Dierks, J. M. Butterworth, J. Zaja̧c, B. Nizioł, A. Eskreys, S. K. Park, Amedeo Staiano, Tachishige Hirose, M. Kuze, R. Hamatsu, J. Kulka, L. Wai, P.L. Makkar, R. Stroili, C. Peroni, M. Roco, G. Geitz, W. Kröger, Dg Stairs, J. Malos, and C. Fanin

Subjects
Physics, Nuclear and High Energy Physics, ZEUS (particle detector), Photon, High Energy Physics::Phenomenology, Nuclear Theory, Detector, Virtual particle, HERA, Particle detector, Particle scattering, Nuclear physics, Cross section (physics), High Energy Physics::Experiment, Nuclear Experiment
Abstract

The total photoproduction cross section is determined from a measurement of electroproduction with the ZEUS detector at HERA. The Q2 values of the virtual photons are in the range 10−7

Published
1992
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4. Measurement of Multiplicity and Momentum Spectra In the Current Fragmentation Region of the Breit Frame At Hera

Author

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

Subjects
Quark, Particle physics, E+E ANNIHILATION, Physics and Astronomy (miscellaneous), LUND MONTE-CARLO, FOS: Physical sciences, Elementary particle, ZEUS, SIMULTANEOUS PATTERN-RECOGNITION, CENTRAL TRACKING DETECTOR, KALMAN FILTERING METHOD, JET FRAGMENTATION, HADRON DISTRIBUTIONS, QUARK FRAGMENTATION, PETRA ENERGIES, QCD JETS, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), deep inelastic scattering, 0103 physical sciences, Quantum field theory, Multiplicity (chemistry), 010306 general physics, Engineering (miscellaneous), Physics, Quantum chromodynamics, 010308 nuclear & particles physics, HERA, Deep inelastic scattering, Charged particle, High Energy Physics::Experiment
Abstract

Charged particle production has been measured in Deep Inelastic Scattering (DIS) events using the ZEUS detector over a large range of $Q^2$ from 10 to $1280 {\rm\ GeV}^2$. The evolution with $Q$ of the charged multiplicity and scaled momentum has been investigated in the current fragmentation region of the Breit frame. The data are used to study QCD \linebreak coherence effects in DIS and are compared with corresponding \ee~data in order to test the universality of quark fragmentation., 33 pages, latex, 8 figures appended as uuencoded file

Published
1995

5. Inclusive Jet Differential Cross Sections in Photoproduction at HERA

Author

Giuseppe Iacobucci, Y Zhang, S. Nickel, Antonino Zichichi, D. B. Miller, J. Gajewski, Douglas Gingrich, M. Basile, V. D. Kobrin, T. Dubbs, J. Biltzinger, P. Göttlicher, D. Haun, Giuseppe Levi, K. Jelen, W. Kröger, D. Acosta, Dg Stairs, G. Cases, J. Mollen, I. Butterworth, Y. Iga, Christian Nemoz, Cristiana Peroni, Y. Nakamitsu, Katsuo Tokushuku, R. J. Cashmore, N. Dyce, Fernando Barreiro, J.K. Mayer, A. Bertolin, K. Prytz, Luis Labarga, J. F. de Trocóniz, Umberto Dosselli, R. Ayad, C. Voci, S. Bhadra, M. Roco, D. J. Gilkinson, M. Derrick, W. Metcalf, Martin Utley, U. Holm, G.P. Heath, Krzysztof Piotrzkowski, Mauro Morandin, L. Zawiejski, Roberto Cirio, G. Cara Romeo, M. Brkic, Jose Repond, P. de Jong, T. Tymieniecka, K. Ohrenberg, Janusz Chwastowski, Jens Hartmann, G. D'Agostini, Thomas Trefzger, T. Doeker, L. W. Hung, Hartmut Sadrozinski, G. Geitz, Meng Wang, P. Giusti, G. Zacek, G. Drews, J. A. Parsons, T. Y. Ling, L. Lindemann, G. Zech, J.D. McFall, P.F. Ermolov, K. K. Joo, Giovanni Abbiendi, W. H. Smith, Mário Costa, W. Hain, B. Y. H. Hung, H.G.J.M. Tiecke, A. Bargende, A.H. Walenta, Robert Klanner, R. R. McNeil, E. A. De Wolf, U. Kötz, E. Tassi, U. F. Katz, J. Schlereth, F.S. Chlebana, P. Bruni, A. Cassidy, Costas Foudas, Ta Romanowski, K. Wick, Simon George, F. Benard, M. Rohde, Claudia Glasman, Marco Schioppa, K. Charchuła, A. Bruni, J. F. Martin, M. Löwe, Tachishige Hirose, C.J.S. Morgado, Michele Arneodo, A. Eskreys, P. G. Pelfer, L.W. Mo, Djp Norman, M.A.J. Botje, M. Iori, D. Revel, R. Stanek, E. Badura, S. Nagayama, B. Musgrave, Luca Stanco, F. F. Wilson, A. Meyer, T. Yip, M. Chiarini, M. Kuze, V. O'Dell, O. Mańczak, G. F. Hartner, J. J. Whitmore, R. Seidlein, J. K. Bienlein, B.D. Burrow, P. Cloth, R. Imlay, M. Nakahata, M. St.Laurent, Guenter Wolf, A. Bernstein, Y. Zamora Garcia, T. Voß, P. Morawitz, A. Caldwell, F. Palmonari, F. Ikraiam, A. Mass, J. K. Sedgbeer, J. Kochocki, F. Frasconi, V. K. Nadendla, Jonathan Butterworth, Lucia Votano, C. Nath, I. Gialas, H. Heßling, A. A. Savin, L. Wai, Amedeo Staiano, S. Magill, J. Schroeder, L. Suszycki, Marcel Vreeswijk, Andrea Contin, G. Bruni, A. Kruse, R. Loveless, R. Stroili, R. J. Nowak, D. Schramm, C. A. Heusch, Cg Matthews, E. Paul, C. Fordham, Ulf Behrens, Federico Cindolo, W. Bogusz, H. Kowalski, K.W. McLean, A. Ladage, M. Zachara, F. Ciralli, Leszek Adamczyk, J. Del Peso, A. Shapira, F. J. Sciulli, S. Söldner-Rembold, E. Lohrmann, Y. Eisenberg, L.E. Sinclair, F. Dal Corso, K. Homma, T. Hasegawa, M.I. Ferrero, A. Freidhof, R. Graciani, Matthias Kasemann, T. Poser, A. Stifutkin, M. Lancaster, R. G. Feild, A. Leich, B. Lu, J.T. Wu, M.B. Crombie, K.M. Furutani, I. Ali, D. Notz, Vladimir Bashkirov, R. Walczak, B. Ladage, W.N. Murray, G. Anzivino, L. Bellagamba, S. H. Yon, James Crittenden, Aleksander Filip Żarnecki, Silvia Maselli, K. Heinloth, D. S. Bailey, J. Zaja̧c, T. W. Jones, Anna Goussiou, W. Schulz, Debades Bandyopadhyay, A. Nigro, L. S. Durkin, G. Grzelak, Giuseppe Barbagli, D. Daniels, G. L. Bashindzhagyan, N. P. Zotov, R. J. Teuscher, T. C. Bacon, M. Nakao, P. Borzemski, A.S. Wilson, E. Barberis, Helen F Heath, Wr Frisken, T.L. Short, Efstathios Stiliaris, A. N. Solomin, M. Geerts, K. Blankenship, G. Briskin, A Furtjes, M. Grothe, R.J. Tapper, D. Horstmann, R. Timellini, A. Dake, N. H. Brook, U. Mallik, E. Rulikowska-Zarȩbska, A.F. Whitfield, S.M. Mari, L. Hagge, R. S. Orr, M. de Kamps, S. Qian, H. J. Kim, S. Mine, P. B. Straub, I. H. Park, Ben Bylsma, J. Milewski, Giovanni Maccarrone, V. L. Harris, I. Fleck, S. Schlenstedt, P. J. Bussey, Kenneth Long, R. Hamatsu, B. Behrens, J. Puga, H. Hartmann, Yasunori Yamazaki, D. Krakauer, Danuta Kisielewska, G. Bari, T. Massam, S. M. Hong, C.R. Sampson, Jose M Hernandez, H. Hultschig, Stan Bentvelsen, C. Youngman, M. Van Hook, V.A. Jamieson, B. Bednarek, M. Mattioli, R. Beuselinck, Jeffrey T. Rahn, Sridhara Dasu, Lothar At Bauerdick, R. L. Talaga, S Campbell-Robson, Halina Abramowicz, T. Ishii, J. F. Labs, B. Löhr, H. Kammerlocher, G. Sartorelli, John Hart, F. Zetsche, J. L. Thron, P. Joos, J. Stamm, B. Foster, Roberto Carlin, Luisa Cifarelli, L. K. Gladilin, Neville Harnew, P. M. Patel, Samuel Silverstein, S. Böttcher, A. Prinias, J. Ciborowski, R. Ullmann, S.H. An, M. Dardo, C. Coldewey, B. Krebs, D. Lüke, A. Polini, M. H. Suh, B. Gutjahr, Y. Nagasawa, U. Schneekloth, W. Koch, J. A. Zakrzewski, Amanda Cooper-Sarkar, Nicolo Cartiglia, M. Adamus, J.B. Lane, T. Neumann, G. Marini, T. Tsurugai, S. Yang, Masashi Hazumi, F. Arzarello, R. J. Seifert, Rr Rau, A. Quadt, R.S. Gilmore, C. Rembser, N. A. McCubbin, A.K. Wróblewski, A. Bamberger, L. Köpke, J.A. O'Mara, H.J. Grabosch, Mariusz Flasiński, S. Dagan, S. Kitamura, Tadeusz Kowalski, S.S. Wilson, F. Selonke, E. Hilger, A. Byrne, K. Honscheid, Yu. A. Golubkov, M. Krzyżanowski, S. Kartik, D.D. Reeder, G. Poelz, Lutz Feld, J. Roldán, A.S. Proskuryakov, B.Y. Oh, R. van Woudenberg, M Eckart, B. Diekmann, Francois Corriveau, C. Li, Detlef Filges, M. Posocco, Geoffrey Smith, A. Kotański, P.M. Kooijman, D. K. Hasell, E. Gallo, J. Shulman, Tobias M. Haas, Juan Terron, M. Kasprzak, Ada Solano, Shoichi Yamada, R.C.E. Devenish, S. Limentani, P. B. Kaziewicz, L. Lamberti, H. Uijterwaal, G.A. Blair, G. Laurenti, S. Mengel, J. Mainusch, C. Rethfeldt, W. Schott, Cd Catterall, L. Iannotti, H.-P. Jakob, R. L. Saunders, R. Brugnera, V. A. Kuzmin, D. C. Bailey, M. De Giorgi, Gm Levman, S. De Paspuale, E. McCliment, N. Pavel, I. Suzuki, Rosario Nania, Sung Keun Park, William S. Lockman, A. Seiden, A. Dannemann, M. Przybycień, A. T. Doyle, J. Bulmahn, A.G. Tenner, Wouter Verkerke, R. Schattevoy, R. Yoshida, B. A. Dolgoshein, T. Kȩdzierski, T. Nagira, Roberto Sacchi, B. Hubbard, J. M. Pawlak, Aharon Levy, T.J. Llewellyn, J. N. Lim, R. Sinkus, J.-L. Schneider, K. Muchorowski, P. Luffman, A. Frey, R. Wedemeyer, K. Eskreys, T.P. Shah, S. M. Wang, D. H. Saxon, Masami Chiba, Klaus Kurt Desch, S. W. Nam, J.J. Engelen, S. Ritz, D. S. Hanna, Anselmo Margotti, L.W. Wiggers, D. Westphal, G. Theisen, U. Karshon, Luis Hervas, D. Boscherini, G. Susinno, Saverio D'Auria, G. Castellini, J.S.T. Ng, L. M. Shcheglova, and Zeus (IHEF, IoP, FNWI)

Subjects
Nuclear and High Energy Physics, Particle physics, Photon, Logarithm, LUND MONTE-CARLO, Monte Carlo method, Hadron, Parton, 01 natural sciences, 7. Clean energy, EVENTS, COLLIDER, Nuclear physics, 0103 physical sciences, photoproduction, differential cross section, CALORIMETER, 010306 general physics, Parton shower, Nuclear Experiment, Physics, E+E-PHYSICS, 010308 nuclear & particles physics, ZEUS, LEADING-ORDER QCD, HERA, PHOTON, DIFFRACTIVE HARD SCATTERING, PARTON DISTRIBUTIONS, FRAGMENTATION, High Energy Physics::Experiment
Abstract

Inclusive jet differential cross sections for the reaction ep → jet + X at Q2 below 4 GeV2 have been measured with the ZEUS detector at HERA using an integrated luminosity of 0.55 pb-1. These cross sections are given in the kinematic region 0.2 < y < 0.85, for jet pseudorapidities in the ep-laboratory range -1 < ηjet < 2 and refer to jets at the hadron level with a cone radius of one unit in the η - φ plane. These results correspond to quasi-real photoproduction at centre-of-mass energies in the range 130-270 GeV and, approximately, for jet pseudorapidities in the interval -3 < ηjet(γρ CMS) < 0. These measurements cover a new kinematic regime of the partonic structure of the photon, at typical scales up to ∼300 GeV2 and photon fractional momenta down to xγ ∼ 10-2. Leading logarithm parton shower Monte Carlo calculations, which include both resolved and direct processes and use the predictions of currently available parametrisations of the photon parton distributions, describe in general the shape and magnitude of the measured ηjet and ETjet distributions.

Published
1995

6. MEASUREMENT OF TOTAL AND PARTIAL PHOTON PROTON CROSS-SECTIONS AT 180 GEV CENTER-OF-MASS ENERGY

Author

S.H. An, B. Gutjahr, Danuta Kisielewska, Cg Matthews, D. Schramm, C. A. Heusch, F. Benard, Lorenzo Bellagamba, D. Westphal, C. Youngman, T. Tsurugai, E. McCliment, John Parsons, Y. Nakamitsu, E. Lohrmann, J.C. Giddings, H. Kreutzmann, D. Krakauer, K. Prytz, T. Poser, G. Theisen, U. Karshon, Luis Hervas, G. Susinno, K.M. Furutani, T. Y. Kim, S. Mine, C. Raine, Katsuo Tokushuku, R. J. Tapper, C. Peroni, M. Roco, F. Selonke, G. Cara Romeo, M. Przybycień, Masashi Hazumi, G. Geitz, Yuji Yamazaki, W. Schulz, R. Yoshida, N. A. McCubbin, F. Arzarello, Saverio D'Auria, A. Nigro, Umberto Dosselli, E. Hilger, C. Rembser, S. Böttcher, Ada Solano, Y. Nagasawa, J.B. Lane, Mariusz Flasiński, A. Byrne, Graziano Bruni, Wouter Verkerke, A.M. Khan, J.S.T. Ng, M. Mattioli, Simon George, Vladimir Bashkirov, Tobias M. Haas, F. J. Sciulli, Tachishige Hirose, M. Krzyżanowski, Antonino Zichichi, David Cussans, Janusz Chwastowski, Lothar At Bauerdick, S. Limentani, Rr Rau, A. Contin, R. Schattevoy, B. A. Dolgoshein, T. Nagira, L. Köpke, M. Kuze, A.F. Whitfield, B.Y. Oh, J. F. Martin, Ivor Fleck, J. A. Zakrzewski, A. Freidhof, L. Wai, N. Pavel, I. Suzuki, Ta Romanowski, W. Kröger, D. Acosta, Dg Stairs, P.L. Makkar, R. Stroili, I. H. Park, Ben Bylsma, G. Grzelak, S. Bentyelsen, T. C. Bacon, Shoichi Yamada, Richard Teuscher, M. Iori, T. Yip, J. Mollen, J. Milewski, J. Krüger, E. A. De Wolf, Claudia Glasman, B. Löhr, G.A. Blair, Michele Guida, J. M. Pawlak, E. Rulikowska-Zarebska, Jose Repond, K. Ohrenberg, F. F. Wilson, M. Chiarini, J.-L. Schneider, C. Li, S. Nickel, D. B. Miller, Abraham Seiden, T. Kedzierski, Meng Wang, W. Vogel, Guenter Wolf, A. Bernstein, Y. Zamora Garcia, M. Lancaster, D.D. Reeder, James Crittenden, H. Hartmann, J. Gajewski, J. Roldán, E. Badura, P. Joos, M. Basile, Jonathan Butterworth, Masami Chiba, Jose M Hernandez, K. Jeleń, R. van Woudenberg, W. H. Smith, S. De Pasquale, G. Laurenti, B. Foster, T. Massam, V. D. Kobrin, P. Göttlicher, E.N. Kuznetsov, Lucia Votano, Giuseppe Iacobucci, S. Kartik, B. Diekmann, H. Heßling, Robin Devenish, J. Biltzinger, L. Adamczyk, Luca Stanco, P. Bruni, Costas Foudas, L.W. Mo, Klaus Kurt Desch, K. Muchorowski, Mário Costa, C. Del Papa, Samuel Silverstein, S. Qian, P. Luffman, A. Frey, Giuseppe Levi, V. O'Dell, O. Mańczak, G. F. Hartner, Nicolo Cartiglia, D. Haun, Francois Corriveau, J. K. Sedgbeer, Detlef Filges, A.H. Walenta, F.S. Chlebana, G. Cases, J. Engelen, Sridhara Dasu, D. J. Gilkinson, K. Eskreys, Luisa Cifarelli, Neville Harnew, A Furtjes, F. Gasparini, S. Yang, D. K. Hasell, P. Giusti, G. Drews, Halina Abramowicz, E. Gallo, T. Bienz, A. Kotański, A. Caldwell, L. S. Durkin, A.G. Tenner, R. Wedemeyer, W. Metcalf, Silvia Maselli, U. Holm, Thomas Trefzger, Y. Eisenberg, A. Meyer, W. Hain, J. Shulman, R.S. Gilmore, H.J. Grabosch, H.-P. Jakob, W. S. Lockman, R. Hamatsu, J. Puga, Robert Orr, F. Frasconi, Rosario Nania, D. Horstmann, R. Timellini, A. Dake, I. Butterworth, T.P. Shah, R. Graciani, R. R. McNeil, N. H. Brook, V. L. Harris, Y. Iga, L. Lamberti, H. Uijterwaal, Matthias Kasemann, R. Walczak, K. Heinloth, A. Eskreys, Juan Terron, M. Kasprzak, Giuseppe Barbagli, R. Brugnera, Krzysztof Piotrzkowski, D. Notz, B. Lu, K. Charchuła, A. T. Doyle, J. Schlereth, K. Wick, S. H. Yon, M.A.J. Botje, Jens Hartmann, A. Kruse, S.S. Wilson, Douglas Gingrich, A. Cassidy, M. Nakahata, M. Adamus, J.R. Forbes, K.W. McLean, V. A. Kuzmin, D. C. Bailey, M. De Giorgi, A. Dannemann, T. W. Jones, Anna Goussiou, S. W. Nam, M. Löwe, J. Kochocki, S. Dagan, G. L. Bashindzhagyan, N. P. Zotov, Amanda Cooper-Sarkar, Marcel Vreeswijk, S. K. Park, P. Kooijman, F. Palmonari, G. Marini, Marco Schioppa, S. Kramarczyk, P. G. Pelfer, A. Ladage, S. Söldner-Rembold, A.K. Wróblewski, A. Bamberger, Roberto Sacchi, B. Hubbard, K. Honscheid, Yu. A. Golubkov, G. Sartorelli, J. J. Whitmore, R. J. Seifert, Ulf Behrens, Federico Cindolo, H. Kowalski, Amedeo Staiano, M. Stavrianakou, F. Ciralli, R. Seidlein, S. Ritz, D. S. Hanna, S. Mengel, J. Mainusch, Gm Levman, J. Bulmahn, H. Tiecke, Aharon Levy, T.J. Llewellyn, A. Vorvolakos, P.F. Ermolov, R. Loveless, R. Ayad, J. Del Peso, U. Schneekloth, T. Neumann, A. Mass, Anselmo Margotti, L.W. Wiggers, I. Gialas, Hartmut Sadrozinski, M. Nuti, J. Schroeder, M. Posocco, Geoffrey Smith, J. N. Lim, A. Prinias, J. A. Nash, R. Sinkus, Stefano Maria Mari, T.L. Short, Efstathios Stiliaris, L. Hagge, J. K. Bienlein, S. Kitamura, M. Geerts, K. Blankenship, C. Rethfeldt, W. Schott, Cd Catterall, R. J. Cashmore, Luis Labarga, W. Koch, Christian Nemoz, T. Ishii, C. Fordham, I. Ali, C.R. Sampson, A. Shapira, F. W. Bullock, G. Castellini, M. Derrick, M. de Kamps, N. Dyce, T. Tymieniecka, L.E. Sinclair, P. Cloth, Tadeusz Kowalski, R. Imlay, C. Voci, K. Homma, M. Zachara, Helen F Heath, Wr Frisken, M. Brkic, J. A. O'Mara, U. Kötz, H. J. Kim, S. Bhadra, Alessia Bruni, M.I. Ferrero, S. Magill, G. Poelz, Giovanni Maccarrone, Lutz Feld, Robert Stanek, G. D'Agostini, S. Schlenstedt, P. J. Bussey, P.M. Patel, R. G. Feild, C. O. Kim, V. K. Nadendla, H. Hultschig, T. Y. Ling, T. Doeker, S. Nagayama, B. D. Burow, H. Kammerlocher, John Hart, G. Zech, W.N. Murray, R. J. Nowak, Giovanni Abbiendi, F. Ikraiam, M.B. Crombie, C.J.S. Morgado, Michele Arneodo, G. Anzivino, N.C. Roocroft, Robert Klanner, M. Nakao, P. Borzemski, Fernando Barreiro, A.S. Wilson, A. A. Savin, L. Suszycki, F. Dal Corso, D. H. Saxon, T. Hasegawa, A. Leich, Af Zarnecki, Debades Bandyopadhyay, S. M. Hong, R. L. Talaga, Mauro Morandin, L. W. Hung, P. B. Straub, Kenneth Long, A. Bargende, U. F. Katz, B. Behrens, G. Bari, M. Van Hook, V.A. Jamieson, B. Bednarek, R. Beuselinck, D. Revel, A. A. Voronin, F. Zetsche, J. L. Thron, E. Barberis, A. N. Solomin, U. Mallik, T. Khatri, J.W. Mitchell, Greg P Heath, J. Ciborowski, R. Ullmann, M. Dardo, C. Coldewey, B. Krebs, Leonid Gladilin, D. Lüke, Davide Boscherini, D. Zer-Zion, P. de Jong, M. H. Suh, J.K. Mayer, A. Bertolin, D. Shaw, J. Zajc, J. F. de Trocóniz, L. Zawiejski, Roberto Cirio, M. Rohde, B. Musgrave, M. St.Laurent, E. Paul, A. Stifutkin, J. F. Labs, and Roberto Carlin

Subjects
Particle physics, Photon, Physics and Astronomy (miscellaneous), Proton, ZEUS, CENTRAL TRACKING DETECTOR, ZEUS BARREL CALORIMETER, DIFFRACTION DISSOCIATION, MONTE-CARLO, HADRONIC PROPERTIES, COLLIDER ENERGIES, EVENT GENERATOR, HERA ENERGIES, PHOTOPRODUCTION, inelastic cross section, Nuclear physics, Vector meson, cross section measurement, Engineering (miscellaneous), Physics, ZEUS (particle detector), Detector, HERA, diffractive production, Cross section (geometry), High Energy Physics::Experiment, Center of mass
Abstract

Photon proton cross sections for elastic light vector meson production, σel νp, inelastic diffractive production, σnd νp, non-diffractive production, σd νp, as well as the total cross section, σtot νp, have been measured at an average υp center of mass energy of 180 GeV with the ZEUS detector at HERA. The resulting values are σel νp = 18 ± 7 μb, σd νp = 33 ± 8 μb, σnd νp = 91 ± 11 μb, and σtot νp 143 ± 17 μb, where the errors include statistical and systematic errors added in quadrature. © 1994 Springer-Verlag.

Published
1994

7. Measurement of the Proton Structure-function F2 In ep Scattering At Hera

Author

E. Barberis, Fernando Barreiro, U. Mallik, T. Khatri, J.W. Mitchell, Greg P Heath, Mauro Morandin, Z. Jakubowski, R. Gläser, L. W. Hung, A. Bargende, D. Revel, A. A. Voronin, A. Meyer, A. Montag, Marcel Vreeswijk, J. Del Peso, L.E. Sinclair, K. Homma, M.B. Crombie, Marco Schioppa, P. G. Pelfer, S.J.P. Smith, I. McArthur, P. Bruni, Costas Foudas, L.W. Mo, K. U. Pösnecker, R. Seidlein, J. F. Martin, A. Mass, Guenter Wolf, A. Bernstein, Y. Zamora Garcia, A. Caldwell, F. Frasconi, M. Lancaster, D.D. Reeder, Masashi Hazumi, H. F.W. Sadrozinski, A. Shapira, B. Diekmann, R. Yoshida, B.D. Burow, F. Bernard, N. A. McCubbin, D. Haun, C. Del Papa, J.R. Forbes, K.W. McLean, F. J. Sciulli, A. Ladage, T. Kȩdzierski, A. Vorvolakos, G. Cases, M. Krzyanowski, A. Freidhof, B. Lu, T. Nagira, S. Söldner-Rembold, C.J.S. Morgado, Michele Arneodo, N.C. Roocroft, S.H. An, B. Gutjahr, J. M. Pawlak, R. Meijer Drees, P. Giusti, R. Brugnera, C. Fordham, V. A. Kuzmin, D. C. Bailey, M. De Giorgi, P.M. Hallam-Baker, T.L. Short, Efstathios Stiliaris, G. Castellini, M. Zachara, M. Iori, G. Drews, A. Nigro, Michele Guida, Jose Repond, James Crittenden, J. A. Parsons, J. Roldán, M. de Kamps, J. Nash, M. Kückes, R. van Woudenberg, L. Lamberti, G. Grzelak, D. Schramm, C. A. Heusch, T. C. Bacon, S. Böttcher, W. Hain, A. Eskreys, Gm Levman, S. Kramaczyk, A. Dwuraźny, A.F. Whitfield, A. A. Savin, Detlef Filges, H. Uijterwaal, H. J. Kim, M.A.J. Botje, F. Arzarello, K. Muchorowski, D. K. Hasell, E. Gallo, P.M. Patel, K. O'Shaughnessy, Mariusz Flasiński, L. Suszycki, Giovanni Maccarrone, K. Prytz, A. Byrne, S. De Pasquale, W.N. Murray, G. Anzivino, A Furtjes, F. Gasparini, A. Kruse, S. Schlenstedt, P. J. Bussey, J. Shulman, A. Zichini, W. H. Smith, G. Gloth, H. Müsch, R. Wedemeyer, Rosario Nania, Sung Keun Park, Ulf Behrens, Federico Cindolo, H. Kowalski, S. Qian, E. Lohrmann, F. Ciralli, H. Kreutzmann, I. Gialas, O. Lin, Silvia Maselli, M. Momayezi, M. Nuti, Juan Terron, M. Kasprzak, M. Nakao, P. Borzemski, E. Badura, Mário Costa, U. Contino, Samuel Silverstein, L. Hagge, J. Schroeder, F.S. Chlebana, Amedeo Staiano, Cg Matthews, S. W. Nam, A. Dannemann, T. Ishii, K.M. Furutani, I. Fleck, Leszek Adamczyk, M.I. Ferrero, J.D. Prentice, R. Timellini, A. Dake, N. H. Brook, V. L. Harris, G. Feild, J. Bulmahn, N. Pavel, P. Erhard, Jens Hartmann, W. Schulz, R. Loveless, I. Suzuki, P. Kooijman, T. S. Yoon, Giuseppe Iacobucci, T. Poser, S. Ritz, D. S. Hanna, R. J. Seifert, J.B. Lane, William S. Lockman, Anselmo Margotti, L.W. Wiggers, H. van der Lugt, Rr Rau, M. Geerts, K. Blankenship, R. R. McNeil, Danuta Kisielewska, A. Stopczyński, C. Youngman, C.R. Sampson, A. Contin, L. Köpke, Stefano Maria Mari, L. Bellagamba, A. Francescato, A. M. Cooper-Sarkar, S. Dagan, K. Charchuła, A. Bruni, J. K. Bienlein, J. Ciborowski, R. Ullmann, D. J. Gilkinson, W. Metcalf, Ta Romanowski, F. Dal Corso, M. Löwe, M. Dardo, Masami Chiba, K. Honscheid, Yu. A. Golubkov, S. Nagayama, P. Göttlicher, T. Hasegawa, J. Zaja̧c, Klaus Kurt Desch, A. Leich, S. Mengel, J. Mainusch, J. J. Whitmore, A.G. Tenner, H. Tiecke, F. Ikraiam, S. Nickel, D. B. Miller, U. Holm, Debades Bandyopadhyay, J. Gajewski, C. Coldewey, M. Posocco, B. Nizioł, B. Krebs, M. Basile, F. F. Wilson, T. Massam, J. Biltzinger, M. Chiarini, C. Peroni, M. Roco, Geoffrey Smith, K. Wick, C. Rethfeldt, W. Schott, Cd Catterall, H.-P. Jacob, F. Palmonari, E. Tscheslog, D. Westphal, G. Theisen, U. Karshon, A.F. arnecki, Krzysztof Piotrzkowski, Jonathan Butterworth, F. W. Bullock, G. Geitz, Luis Hervas, S. M. Hong, R. L. Talaga, D. Boscherini, G. Susinno, A.H. Walenta, Saverio D'Auria, D. Krakauer, Kr Long, D. Lüke, D. Zer-Zion, M. H. Suh, J.S.T. Ng, J. Kochocki, Simon George, Tachishige Hirose, Roberto Sacchi, Y. Nagasawa, A. Prinias, W. Koch, B. Hubbard, Giuseppe Levi, M. Kuze, R. Hamatsu, Tadeusz Kowalski, L. Wai, K. Jelen, J. Engelen, P.L. Makkar, R. Stroili, J. Mollen, G. Poelz, J.K. Mayer, Aharon Levy, D. Shaw, Tobias M. Haas, W. Kröger, J. N. Lim, E.N. Kuznetsov, O. Mańczak, Dg Stairs, Shoichi Yamada, R.C.E. Devenish, G. F. Hartner, G. Laurenti, J. F. de Trocóniz, I. Butterworth, Y. Iga, L. Zawiejski, Roberto Cirio, P. de Jong, J.-L. Schneider, W. Vogel, H. Brückmann, P. Luffman, A. Frey, M. Rohde, B. Musgrave, M. St.Laurent, K. Eskreys, T.P. Shah, D. H. Saxon, E. Paul, G. Cara Romero, G.G. Stairs, T. Tsurugai, E. McCliment, J.C. Giddings, D.M. Gingrich, A. Seiden, R. Casaccia, M. Przybycień, S.S. Wilson, S. Repond, A. T. Doyle, A.M. Khan, R. Schattevoy, G. Bari, J. F. Labs, Roberto Carlin, L. S. Durkin, Ada Solano, R. Walczak, M. Adamus, S. Limentani, G. Marini, A.K. Wróblewski, A. Bamberger, F. Selonke, E. Hilger, M. Z. Wang, G.A. Blair, B.Y. Oh, C. Li, Stan Bentvelsen, S. Kartik, Eduardo Ros, R. J. Cashmore, Luis Labarga, M. Derrick, T. Tymieniecka, J. A. O'Mara, U. Kötz, Vivian O'Dell, C. O. Kim, V. K. Nadendla, R. J. Nowak, Francois Corriveau, A. Kotański, P. Morawitz, S. Kasai, A. Cassidy, M. Nakahata, U. Schneekloth, T. Neumann, S. Kitamura, Christian Nemoz, N. Dyce, C. Voci, S. Bhadra, T. Doeker, G. Jahnen, Claudia Glasman, R. Stanek, Luca Stanco, J. K. Sedgbeer, T. Bienz, G. Bruni, J.A. Zakrzewski, J. Leslie, Lucia Votano, Y. Eisenberg, B. Losowski, K. Heinloth, Giuseppe Barbagli, G. Sartorelli, R. S. Orr, P. B. Straub, M. Brkic, B. Behrens, G. D'Agostini, T. Y. Ling, G. Zech, Giovanni Abbiendi, Robert Klanner, V.A. Jamieson, B. Bednarek, R. Beuselinck, F. Zetsche, J. L. Thron, Y. Nakamitsu, Katsuo Tokushuku, R. J. Tapper, Umberto Dosselli, David Cussans, Janusz Chwastowski, E. A. De Wolf, I. H. Park, Ben Bylsma, J. Milewski, J. Krüger, H. Hartmann, Sridhara Dasu, Halina Abramowicz, Matthias Kasemann, D. Notz, S. H. Yon, T. W. Jones, Anna Goussiou, G. L. Bashindzhagyan, N. P. Zotov, R. J. Teuscher, Hideki Okuno, P.F. Ermolov, D. Monaldi, P. Cloth, R. Imlay, S. Magill, T.J. Llwellyn, E. Rulikowska-Zarȩbska, T. Y. Kim, S. Mine, C. Raine, M. Mattioli, Lothar At Bauerdick, Thomas Trefzger, B. Löhr, P. Joos, B. Foster, Yasunori Yamazaki, H. Hultschig, H. Kammerlocher, John Hart, Luisa Cifarelli, L. K. Gladilin, Neville Harnew, Nicolo Cartiglia, S. Yang, R.S. Gilmore, H.J. Grabosch, R. Ayad, I. 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Schulz, W, Selonke, F, Stiliaris, E, Tscheslog, E, Tsurugai, T, Vogel, W, Westphal, D, Wolf, G, Youngman, C, Grabosch, Hj, Leich, A, Meyer, A, Rethfeldt, C, Schlenstedt, S, Barbagli, G, Francescato, A, Nuti, M, Pelfer, P, Anzivino, G, Casaccia, R, Depasquale, S, Qian, S, Votano, L, Bamberger, A, Freidhof, A, Poser, T, Soldnerrembold, S, Theisen, G, Trefzger, T, Brook, Nh, Bussey, Pj, Doyle, At, Forbes, Jr, Jamieson, Va, Raine, C, Saxon, Dh, Bruckmann, H, Gloth, G, Holm, U, Kammerlocher, H, Krebs, B, Neumann, T, Wick, K, Furtjes, A, Lohrmann, E, Milewski, J, Nakahata, M, Pavel, N, Poelz, G, Schott, W, Terron, J, Zetsche, F, Bacon, Tc, Beuselinck, R, Butterworth, I, Gallo, E, Harris, Vl, Miller, Db, Prinias, A, Sedgbeer, Jk, Vorvolakos, A, Whitfield, A, Bienz, T, Kreutzmann, H, Mallik, U, Mccliment, E, Roco, M, Wang, Mz, Cloth, P, Filges, D, An, Sh, Hong, S, Kim, Co, Kim, Ty, Nam, Sw, Park, Sk, Suh, Mh, Yon, Sh, Imlay, R, Kartik, S, Kim, Hj, Mcneil, Rr, Metcalf, W, Nadendla, Vk, 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Subjects
structure functions, deep inelastic scattering, Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), ZEUS (particle detector), Proton, E+E-PHYSICS, Scattering, LUND MONTE-CARLO, DESY, Elementary particle, ZEUS, HERA, Deep inelastic scattering, QCD, lcsh:QC1-999, JET FRAGMENTATION, Nuclear physics, MODEL, INELASTIC MUON SCATTERING, lcsh:Physics
Abstract

This paper presents our first measurement of the F 2 structure function in neutral-current, deep inelastic scattering using the ZEUS detector at HERA, the ep colliding beam facility at DESY. The data correspond to an integrated luminosity of 24.7 nb −1 . Results are presented for data in range of Q 2 from 10 GeV 2 to 4700 GeV 2 and Bjorken x down to 3.0 × 10 −4 . The F 2 structure function increases rapidly as x decreases.

Published
1993

8. Search for excited electrons using the ZEUS detector

Author

J. F. Martin, Fernando Barreiro, Mauro Morandin, Z. Jakubowski, J. Mollen, M. Iori, Guenter Wolf, A. Bernstein, Y. Zamora Garcia, E.N. Kuznetsov, Marcel Vreeswijk, O. Mańczak, G. F. Hartner, Nicolo Cartiglia, S. Yang, R.S. Gilmore, R. Casaccia, J. F. Labs, J. Kochocki, Rosario Nania, F. J. Sciulli, A. Freidhof, B. Lu, L. W. Hung, A. Bargende, Danuta Kisielewska, James Crittenden, A. Prinias, D. Revel, A. A. Voronin, H.F. Sadronzinski, R.J. Tapper, H.J. Grabosch, E. Rulikowska-Zarȩbska, J.A. Zakrzewski, A Furtjes, F. Gasparini, W. Koch, S.S. Wilson, T. Y. Kim, S. Mengel, C. Raine, A. Stopczyński, C. Youngman, S.H. An, J. Mainusch, J. Leslie, Tadeusz Kowalski, T. Watanabe, A. Meyer, Roberto Carlin, B. Gutjahr, A. Dannemann, D. Monaldi, M. Mattioli, G. Poelz, Eduardo Ros, R. J. Cashmore, D. Schramm, C. A. Heusch, Lothar At Bauerdick, Lucia Votano, C. Rethfeldt, W. Schott, Cd Catterall, S. Nagayama, A. Montag, M. Kückes, J. Bulmahn, Luis Labarga, F. W. Bullock, E. Lohrmann, F. Ikraiam, M. Derrick, F. Arzarello, H. Kreutzmann, J. Del Peso, T. Tymieniecka, Mariusz Flasiński, L.E. Sinclair, Marco Schioppa, P. G. Pelfer, S.J.P. Smith, A. Byrne, F.S. Chlebana, K.M. Furutani, K. U. Pösnecker, U. Kötz, B. Hubbard, M.B. Crombie, R. Seidlein, K. Wick, A. Mass, Q. Lin, S. Kartik, Thomas Trefzger, W. Schulz, A. Shapira, Vivian O'Dell, Aharon Levy, T.J. Llewellyn, J. N. Lim, C. O. Kim, J. Ciborowski, R. Ullmann, R. Yoshida, S. Nickel, B.D. Burow, D. B. Miller, T. Kȩdzierski, R. Gläser, V. K. Nadendla, R. J. Nowak, Francois Corriveau, J. M. Pawlak, M. Dardo, J. Gajewski, C. Coldewey, B. Krebs, H.G.J.M. Tiecke, F. Benard, K. Muchorowski, Giuseppe Iacobucci, K. Prytz, D. Lüke, B. Löhr, Giuseppe Levi, I. Ali, R. Wedemeyer, G. Jahnen, Claudia Glasman, P. Joos, P. Giusti, D. Zer-Zion, M. Basile, B. Foster, J.-L. Schneider, W. Vogel, H. Brückmann, R. Stanek, Helen F Heath, Wr Frisken, M. H. Suh, G. Drews, J. A. Parsons, T. Massam, Luisa Cifarelli, L. K. Gladilin, Neville Harnew, J. Biltzinger, J.K. Mayer, W. Hain, P. Luffman, Luca Stanco, P. Göttlicher, A. Kotański, P. Morawitz, I. Fleck, D. Shaw, H. Hultschig, I. H. Park, J. K. Sedgbeer, K. Eskreys, H. Kammerlocher, E. Barberis, Tobias M. Haas, John Hart, S. Kasai, J. F. de Trocóniz, Ben Bylsma, J. Milewski, J. Krüger, U. Mallik, T. Khatri, J.W. Mitchell, T. Poser, T.P. Shah, D. Haun, T. Bienz, G. Bruni, D. H. Saxon, Greg P Heath, L. Zawiejski, Roberto Cirio, P. de Jong, B. Lisowski, R.C.E. Devenish, J.B. Lane, J. Zaja̧c, G. Laurenti, H. Hartmann, Rr Rau, B. Nizioł, A. Contin, L. Köpke, L. Bellagamba, A. Eskreys, M. Rohde, J. Nash, M.A.J. Botje, K. Jeleń, I. Butterworth, Douglas Gingrich, B. Musgrave, S. K. Park, A.H. Walenta, F. Palmonari, Amedeo Staiano, M. St.Laurent, F. Selonke, E. Hilger, Y. Iga, H. Müsch, E. Paul, Ulf Behrens, Federico Cindolo, M. Krzyżanowski, H. Kowalski, Sridhara Dasu, F. Ciralli, A. Cassidy, B.Y. Oh, M. Nakahata, Halina Abramowicz, L. Hagge, Y. Eisenberg, J. Whitmore, T. Ishii, C. 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Subjects
Nuclear and High Energy Physics, Particle physics, LUND MONTE-CARLO, LEPTON PRODUCTION, Astrophysics::High Energy Astrophysical Phenomena, Electron, excited electrons, electron proton collider, JET FRAGMENTATION, law.invention, MUONS, Nuclear physics, LIMITS, ZEUS, CENTRAL TRACKING DETECTOR, E+E-PHYSICS, Z0 DECAY, GAMMA-GAMMA%22">E+E-->GAMMA-GAMMA, CALORIMETER, law, Collider, Nuclear Experiment, Physics, Muon, ZEUS (particle detector), Luminosity (scattering theory), Compton scattering, HERA, Excited state, High Energy Physics::Experiment
Abstract

This paper reports a search for excited electrons at the HERA electron-proton collider. In a sample corresponding to an integrated luminosity of 26 nb−, no evidence was found for any resonant state decaying into e−γ, νW− or e−Z0. Limits on the coupling strength of an excited electron have been determined for masses between 45 and 225 GeV. This study also reports the observation of the wide-angle eγ Compton scattering process.

Published
1993

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