Measurement of isolated photon production in deep-inelastic scattering at HERA

被引：21

作者：

Aaron, F. D. ^{[44
]}

Aktas, A. ^{[5
,11
]}

Alexa, C. ^{[5
]}

Andreev, V. ^{[24
]}

Antunovic, B. ^{[25
]}

Aplin, S. ^{[11
]}

Asmone, A. ^{[33
,34
]}

Astvatsatourov, A. ^{[4
]}

Backovic, S. ^{[30
]}

Baghdasaryan, A. ^{[39
]}

Baranov, P. ^{[24
]}

Barreletl, E. ^{[28
,29
]}

Barte, W. ^{[11
]}

Baudrand, S. ^{[26
]}

Beckingham, M. ^{[11
]}

Begzsuren, K. ^{[36
]}

Behnke, O. ^{[13
]}

Behrendt, O. ^{[8
]}

Belousov, A. ^{[24
]}

Berger, N. ^{[41
]}

Bizot, J. C. ^{[26
]}

Boenig, M. -O. ^{[8
]}

Boudry, V. ^{[27
]}

Bozovic-Jelisavcic, I. ^{[2
]}

Bracinik, J.

Brandt, G. ^{[13
]}

Brinkmann, M. ^{[11
]}

Brisson, V. ^{[26
]}

Bruncko, D. ^{[15
]}

Buesser, F. W. ^{[12
,27
]}

Bunyatyan, A. ^{[39
,43
]}

Buschhorn, G. ^{[25
]}

Bystritskaya, L. ^{[23
]}

Campbell, A. J. ^{[11
]}

Avila, K. B. Cantun ^{[21
]}

Cassol-Brunner, F. ^{[20
]}

Cerny, K. ^{[32
]}

Cerny, V. ^{[15
,45
]}

Chekelian, V. ^{[25
]}

Cholewa, A. ^{[11
]}

Contreras, J. G. ^{[21
]}

Coughlan, J. A. ^{[6
]}

Cozzikao, G. ^{[10
]}

Cvach, J. ^{[31
]}

Dainton, J. B. ^{[17
]}

Daum, K. ^{[38
,46
]}

Deak, M. ^{[11
]}

de Boer, Y. ^{[23
]}

Delcourt, B. ^{[26
]}

Del Degan, M. ^{[41
]}

机构：

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

[2] Vinca Inst Nnucl Sci, Belgrade, Serbia

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

[4] Univ Antwerp, Inter Univ Inst High Energies, ULB VUB Brussels, Antwerp, Belgium

[5] NIPNE, Bucharest, Romania

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

[7] Inst Nucl Phys, Krakow, Poland

[8] Univ Dortmund, Inst Phys, D-4600 Dortmund, Germany

[9] Joint Inst Nucl Res, Dubna, Russia

[10] CE Saclay, CEA, DSM DAPNIA, Gif Sur Yvette, France

[11] DESY, D-2000 Hamburg, Germany

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

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

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

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

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

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

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

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

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

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

[22] CINVESTAV, Dept Fis, Mexico City, DF, Mexico

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

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

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

[26] Univ Paris Sud, LAL, CNRS, IN2P3, Orsay, France

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

[28] Univ Paris 06, LPNHE, Paris, France

[29] Univ Paris 07, CNRS, IN2P3, Paris, France

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

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

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

[33] Univ Roma Tre, Dept Fis, Rome, Italy

[34] Ist Nazl Fis Nucl, Rome, Italy

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

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

[37] Paul Scherrer Inst, Villigen, Switzerland

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

[39] Yerevan Phys Inst, Yerevan 375036, Armenia

[40] DESY, Zeuthen, Germany

[41] ETH, Inst Teilchenphys, Zurich, Switzerland

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

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

[44] Univ Bucharest, Fac Phys, Bucharest, Romania

[45] Comenius Univ, Bratislava, Slovakia

[46] Univ Wuppertal, Rechenzentrum, Wuppertal, Germany

[47] CERN, Geneva, Switzerland

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

[49] Univ Hamburg, Helmholtz Humboldt Res Award, Hamburg, Germany

[50] Safarik Univ, Kosice, Slovakia

来源：

EUROPEAN PHYSICAL JOURNAL C | 2008年 / 54卷 / 03期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1140/epjc/s10052-008-0541-6

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 isolated photons in deep-inelastic scattering ep -> e gamma X is measured with the H1 detector at HERA. The measurement is performed in the kinematic range of negative four-momentum transfer squared 4 < Q(2)< 150 GeV2 and a mass of the hadronic system W-X > 50 GeV. The analysis is based on a total integrated luminosity of 227 pb(-1). The production cross section of isolated photons with a transverse energy in the range 3 < E-T(gamma)< 10 GeV and pseudorapidity range -1.2 <eta(gamma)< 1.8 is measured as a function of E-T(gamma), eta(gamma) and Q(2). Isolated photon cross sections are also measured for events with no jets or at least one hadronic jet. The measurements are compared with predictions from Monte Carlo generators modelling the photon radiation from the quark and the electron lines, as well as with calculations at leading and next to leading order in the strong coupling. The predictions significantly underestimate the measured cross sections.

引用

页码：371 / 387

页数：17

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