Prompt photons in photoproduction at HERA

被引：24

作者：

Aaron, F. D. ^{[1
,51
]}

Martin, M. Aldaya ^{[12
]}

Alexa, C. ^{[1
]}

Andreev, V. ^{[26
]}

Antunovic, B. ^{[12
]}

Backovic, S. ^{[32
]}

Baghdasaryan, A. ^{[41
]}

Barrelet, E. ^{[30
,31
]}

Bartel, W. ^{[12
]}

Begzsuren, K. ^{[38
]}

Belousov, A. ^{[26
]}

Bizot, J. C. ^{[28
]}

Boudry, V. ^{[29
]}

Bozovic-Jelisavcic, I. ^{[3
]}

Bracinik, J. ^{[4
]}

Brandt, G. ^{[12
]}

Brinkmann, M. ^{[13
]}

Brisson, V. ^{[28
]}

Bruncko, D. ^{[17
]}

Bunyatyan, A. ^{[14
,41
]}

Buschhorn, G. ^{[27
]}

Bystritskaya, L. ^{[25
]}

Campbell, A. J. ^{[12
]}

Cantun Avila, K. B. ^{[23
]}

Cerny, K. ^{[34
]}

Cerny, V. ^{[17
,49
]}

Chekelian, V. ^{[27
]}

Cholewa, A. ^{[12
]}

Contreras, J. G. ^{[23
]}

Coughlan, J. A. ^{[7
]}

Cozzika, G. ^{[11
]}

Cvach, J. ^{[33
]}

Dainton, J. B. ^{[19
]}

Daum, K. ^{[40
,46
]}

Deak, M. ^{[12
]}

de Boer, Y. ^{[12
]}

Delcourt, B. ^{[28
]}

Del Degan, M. ^{[43
]}

Delvax, J. ^{[5
,6
]}

De Wolf, E. A. ^{[5
,6
]}

Diaconu, C. ^{[22
]}

Dodonov, V. ^{[14
]}

Dossanov, A. ^{[27
]}

Dubak, A. ^{[27
,32
]}

Eckerlin, G. ^{[12
]}

Efremenko, V. ^{[25
]}

Egli, S. ^{[39
]}

Eliseev, A. ^{[26
]}

Elsen, E. ^{[12
]}

Falkiewicz, A. ^{[8
]}

机构：

[1] NIPNE, Bucharest, Romania

[2] Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany

[3] Vinca Inst Nucl Sci, Belgrade, Serbia

[4] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England

[5] ULB VUB, Interuniv Inst High Energies, Brussels, Belgium

[6] Univ Antwerp, B-2020 Antwerp, Belgium

[7] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[8] Inst Nucl Phys, Krakow, Poland

[9] TU Dortmund, Inst Phys, Dortmund, Germany

[10] Joint Inst Nucl Res, Dubna, Russia

[11] CE Saclay, CEA, DSM Irfu, Gif Sur Yvette, France

[12] DESY, D-2000 Hamburg, Germany

[13] Univ Hamburg, Inst Expt Phys, Hamburg, Germany

[14] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[15] Heidelberg Univ, Inst Phys, D-6900 Heidelberg, Germany

[16] Heidelberg Univ, Kirchhoff Inst Phys, Heidelberg, Germany

[17] Slovak Acad Sci, Inst Expt Phys, Kosice 04353, Slovakia

[18] Univ Lancaster, Dept Phys, Lancaster, England

[19] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England

[20] Queen Mary Univ London, London E1 4NS, England

[21] Lund Univ, Dept Phys, Lund, Sweden

[22] Univ Mediterranee, CPPM, CNRS, IN2P3, Marseille, France

[23] CINVESTAV, Dept Fis Aplicada, Merida, Yucatan, Mexico

[24] CINVESTAV, Dept Fis, Mexico City 14000, DF, Mexico

[25] Inst Theoret & Expt Phys, Moscow 117259, Russia

[26] PN Lebedev Phys Inst, Moscow 117924, Russia

[27] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[28] Univ Paris 11, CNRS, LAL, IN2P3, F-91405 Orsay, France

[29] Ecole Polytech, CNRS, LLR, IN2P3, F-91128 Palaiseau, France

[30] Univ Paris 06, CNRS, LPNHE, IN2P3, Paris, France

[31] Univ Paris 07, CNRS, LPNHE, IN2P3, Paris, France

[32] Univ Montenegro, Fac Sci, Podgorica, Montenegro

[33] Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic

[34] Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic

[35] Univ Roma Tre, Dipartimento Fis, Rome, Italy

[36] INFN Roma 3, Rome, Italy

[37] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria

[38] Mongolian Acad Sci, Inst Phys & Technol, Ulaanbaatar, Mongolia

[39] Paul Scherrer Inst, Villigen, Switzerland

[40] Univ Wuppertal, Fachbereich C, Wuppertal, Germany

[41] Yerevan Phys Inst, Yerevan 375036, Armenia

[42] DESY, Zeuthen, Germany

[43] ETH, Inst Teilchenphys, Zurich, Switzerland

[44] Univ Zurich, Inst Phys, Zurich, Switzerland

[45] Natl Tech Univ Athens, Dept Phys, GR-15773 Athens, Greece

[46] Univ Wuppertal, Rechenzentrum, Wuppertal, Germany

[47] Safarik Univ, Kosice, Slovakia

[48] CERN, Geneva, Switzerland

[49] Comenius Univ, Bratislava, Slovakia

[50] DESY, Hamburg, Germany

来源：

EUROPEAN PHYSICAL JOURNAL C | 2010年 / 66卷 / 1-2期

关键词：

LIQUID ARGON CALORIMETER; PLUS JET PHOTOPRODUCTION; PARTON DISTRIBUTIONS; CROSS-SECTIONS; QCD ANALYSIS; PROTON; CALIBRATION;

D O I：

10.1140/epjc/s10052-010-1240-7

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 production of prompt photons is measured in the photoproduction regime of electron-proton scattering at HERA. The analysis is based on a data sample corresponding to a total integrated luminosity of 340 pb(-1) collected by the H1 experiment. Cross sections are measured for photons with transverse momentum and pseudorapidity in the range 6< E-T(gamma) < 15 GeV and -1.0< eta(gamma) < 2.4, respectively. Cross sections for events with an additional jet are measured as a function of the transverse energy and pseudorapidity of the jet, and as a function of the fractional momenta x(gamma) and x(p) carried by the partons entering the hard scattering process. The correlation between the photon and the jet is also studied. The results are compared with QCD predictions based on the collinear and on the k(T) factorization approaches.

引用

页码：17 / 33

页数：17

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