Dijet photoproduction at HERA and the structure of the photon

被引：70
|
作者：
Chekanov, S
Derrick, M
Krakauer, D
Magill, S
Musgrave, B
Pellegrino, A
Repond, J
Yoshida, R
Mattingly, MCK
Antonioli, P
Bari, G
Basile, M
Bellagamba, L
Boscherini, D
Bruni, A
Bruni, G
Romeo, GC
Cifarelli, L
Cindolo, F
Contin, A
Corradi, M
De Pasquale, S
Giusti, P
Iacobucci, G
Levi, G
Margotti, A
Massam, T
Nania, R
Palmonari, F
Pesci, A
Sartorelli, G
Zichichi, A
Aghuzumtsyan, G
Bartsch, D
Brock, I
Crittenden, J
Goers, S
Hartmann, H
Hilger, E
Irrgang, P
Jakob, HP
Kappes, A
Katz, UF
Kerger, R
Kind, O
Paul, E
Rautenberg, J
Renner, R
Schnurbusch, H
Stifutkin, A
机构：
[1] Argonne Natl Lab, Argonne, IL 60439 USA
[2] Andrews Univ, Berrien Springs, MI 49104 USA
[3] Univ Bologna, Bologna, Italy
[4] Ist Nazl Fis Nucl, I-40126 Bologna, Italy
[5] Univ Bonn, Inst Phys, D-5300 Bonn, Germany
[6] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England
[7] Univ Calabria, Dept Phys, I-87036 Cosenza, Italy
[8] Ist Nazl Fis Nucl, Cosenza, Italy
[9] Chonnam Natl Univ, Kwangju, South Korea
[10] Columbia Univ, Nevis Labs, Irvington, NY 10027 USA
[11] Inst Nucl Phys, Krakow, Poland
[12] Univ Min & Met Krakow, Fac Phys & Nucl Techniques, Krakow, Poland
[13] Jagiellonian Univ, Dept Phys, Krakow, Poland
[14] DESY, D-2000 Hamburg, Germany
[15] DESY Zeuthen, Zeuthen, Germany
[16] Univ Florence, Florence, Italy
[17] Ist Nazl Fis Nucl, I-50125 Florence, Italy
[18] Univ Freiburg, Fak Phys, D-7800 Freiburg, Germany
[19] Univ Glasgow, Dept Phys & Astron, Glasgow, Lanark, Scotland
[20] Univ Hamburg, Inst Expt Phys 1, Hamburg, Germany
[21] Univ Hamburg, Inst Expt Phys 2, Hamburg, Germany
[22] Univ London Imperial Coll Sci Technol & Med, High Energy Nucl Phys Grp, London, England
[23] Forschungszentrum Julich, Inst Kernphys, D-5170 Julich, Germany
[24] KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki, Japan
[25] Minist Educ & Sci Kazakhstan, Inst Phys & Technol, Alma Ata, Kazakhstan
[26] Korea Univ, Seoul 136701, South Korea
[27] Kyungpook Natl Univ, Taegu 702701, South Korea
[28] Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain
[29] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada
[30] Meiji Gakuin Univ, Fac Gen Educ, Yokohama, Kanagawa, Japan
[31] Moscow MV Lomonosov State Univ, Inst Phys Nucl, Moscow, Russia
[32] NIKHEF H, NL-1009 DB Amsterdam, Netherlands
[33] Univ Amsterdam, Amsterdam, Netherlands
[34] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA
[35] Univ Oxford, Dept Phys, Oxford, England
[36] Univ Padua, Dipartimento Fis, Padua, Italy
[37] Ist Nazl Fis Nucl, Padua, Italy
[38] Penn State Univ, Dept Phys, University Pk, PA 16802 USA
[39] Polytech Univ, Sagamihara, Kanagawa, Japan
[40] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[41] Ist Nazl Fis Nucl, Rome, Italy
[42] Rutherford Appleton Lab, Didcot, Oxon, England
[43] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA
[44] Seoul Natl Univ, Seoul, South Korea
[45] Univ Siegen, Fachbereich Phys, D-5900 Siegen, Germany
[46] Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys, IL-69978 Tel Aviv, Israel
[47] Tokyo Metropolitan Univ, Dept Phys, Tokyo, Japan
[48] Univ Tokyo, Dept Phys, Tokyo 113, Japan
[49] Univ Turin, Dipartimento Fis Sperimentale, Turin, Italy
[50] Ist Nazl Fis Nucl, I-10125 Turin, Italy
来源：
EUROPEAN PHYSICAL JOURNAL C | 2002年 / 23卷 / 04期
关键词：
D O I：
10.1007/s100520200936
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
The dijet cross section in photoproduction ha's been measured with the ZEUS detector at HERA using an integrated luminosity of 38.6 pb(-1). The events were required to have a virtuality of the incoming photon, Q(2), of less than 1 GeV2 and a photon-proton centre-of-mass energy in the range 131 < W-yp < 277 GeV. Each event contains at least two jets satisfying transverse-energy requirements of E-T(jet1) > 14 GeV and E-T(jet2) > 11 GeV and pseudorapidity requirements of -1 < eta(jet1,2) < 2.4. The measurements arc compared to next-to-loading-order QCD predictions. The data show particular sensitivity to the density of partons in the photon, allowing the validity of the current parameterisations to be tested.
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收藏
页码：615 / 631
页数：17
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