Further studies of isolated photon production with a jet in deep inelastic scattering at HERA

被引:6
作者
Abramowicz, H. [20 ,26 ]
Abt, I. [20 ]
Adamczyk, L. [8 ]
Adamus, M. [33 ]
Aggarwal, R. [3 ,37 ]
Antonelli, S. [1 ]
Aushev, V. [17 ]
Aushev, Y. [17 ]
Behnke, O. [10 ]
Behrens, U. [10 ]
Bertolin, A. [22 ]
Bloch, I. [11 ]
Brock, I. [2 ]
Brook, N. H. [31 ,49 ]
Brugnera, R. [23 ,24 ]
Bruni, A. [1 ]
Bussey, P. J. [12 ]
Caldwell, A. [20 ]
Capua, M. [4 ,5 ]
Catterall, C. D. [35 ]
Chwastowski, J. [7 ]
Ciborowski, J. [32 ,50 ]
Ciesielski, R. [10 ,40 ]
Cooper-Sarkar, A. M. [21 ]
Corradi, M. [1 ,36 ]
Dementiev, R. K. [19 ]
Devenish, R. C. E. [21 ]
Dusini, S. [22 ]
Foster, B. [10 ,13 ,44 ]
Gach, G. [8 ]
Gallo, E. [10 ,13 ]
Garfagnini, A. [23 ,24 ]
Geiser, A. [10 ]
Gizhko, A. [10 ]
Gladilin, L. K. [19 ]
Golubkov, Yu. A. [19 ]
Grzelak, G. [32 ]
Guzik, M. [8 ]
Gwenlan, C. [21 ]
Hlushchenko, O. [17 ,47 ]
Hochman, D. [34 ]
Hori, R. [14 ]
Ibrahim, Z. A. [6 ]
Iga, Y. [25 ]
Ishitsuka, M. [26 ,27 ]
Jomhari, N. Z. [6 ]
Kadenko, I. [17 ]
Kananov, S. [26 ]
Karshon, U. [34 ]
Kaur, P. [3 ,38 ]
机构
[1] Ist Nazl Fis Nucl, Bologna, Italy
[2] Univ Bonn, Phys Inst, Bonn, Germany
[3] Panjab Univ, Dept Phys, Chandigarh, India
[4] Univ Calabria, Phys Dept, Calabria, Italy
[5] Ist Nazl Fis Nucl, Calabria, Italy
[6] Univ Malaya, Natl Ctr Particle Phys, Kuala Lumpur 50603, Malaysia
[7] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow, Poland
[8] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Krakow, Poland
[9] Jagiellonian Univ, Dept Phys, Krakow, Poland
[10] DESY, Hamburg, Germany
[11] DESY, Zeuthen, Germany
[12] Univ Glasgow, Sch Phys & Astron, Glasgow, Lanark, Scotland
[13] Hamburg Univ, Inst Expt Phys, Hamburg, Germany
[14] KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki, Japan
[15] Minist Educ & Sci Kazakhstan, Inst Phys & Technol, Alma Ata, Kazakhstan
[16] Natl Acad Sci, Inst Nucl Res, Kiev, Ukraine
[17] Natl Taras Shevchenko Univ Kyiv, Dept Nucl Phys, Kiev, Ukraine
[18] Meiji Gakuin Univ, Fac Gen Educ, Yokohama, Kanagawa, Japan
[19] Lomonosov Moscow State Univ, Skobeltsyn Inst Nucl Phys, Moscow, Russia
[20] Max Planck Inst Phys & Astrophys, Munich, Germany
[21] Univ Oxford, Dept Phys, Oxford, England
[22] Ist Nazl Fis Nucl, Padua, Italy
[23] Univ Padua, Dipartimento Fis & Astron, Padua, Italy
[24] Ist Nazl Fis Nucl, Padua, Italy
[25] Polytech Univ, Tokyo, Japan
[26] Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys, Tel Aviv, Israel
[27] Tokyo Inst Technol, Dept Phys, Tokyo, Japan
[28] Univ Torino, Turin, Italy
[29] Ist Nazl Fis Nucl, Turin, Italy
[30] Univ Piemonte Orientale, Novara, Italy
[31] UCL, Phys & Astron Dept, London, England
[32] Univ Warsaw, Fac Phys, Warsaw, Poland
[33] Natl Ctr Nucl Res, Warsaw, Poland
[34] Weizmann Inst Sci, Dept Particle Phys & Astrophys, Rehovot, Israel
[35] York Univ, Dept Phys, N York, ON M3J 1P3, Canada
[36] Ist Nazl Fis Nucl, Rome, Italy
[37] Pune Univ, Inspire Fac, DST, Pune, Maharashtra, India
[38] St Longowal Inst Engn & Technol, Longowal, Punjab, India
[39] Agensi Nukl Malaysia, Bangi 43000, Malaysia
[40] Rockefeller Univ, New York, NY 10065 USA
[41] Univ Liverpool, Liverpool, Merseyside, England
[42] Tel Aviv Univ, Tel Aviv, Israel
[43] Heidelberg Univ, Phys Inst, Heidelberg, Germany
[44] Univ Oxford, Oxford, England
[45] European X Ray Free Elect Laser Facil GmbH, Hamburg, Germany
[46] Kobe Univ, Kobe, Hyogo, Japan
[47] Rhein Westfal TH Aachen, Aachen, Germany
[48] Univ Bristol, Bristol, Avon, England
[49] Univ Bath, Bath, Avon, England
[50] Univ Lodz, Lodz, Poland
基金
以色列科学基金会; 英国科学技术设施理事会; 加拿大自然科学与工程研究理事会;
关键词
Lepton-Nucleon Scattering (experiments); Photon production; QCD; E-T PHOTONS; CROSS-SECTION; P(P)OVER-BAR COLLISIONS; PROMPT PHOTONS; TRANSVERSE-MOMENTUM; ZEUS; PHOTOPRODUCTION; DESIGN; FRAGMENTATION; CONSTRUCTION;
D O I
10.1007/JHEP01(2018)032
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
Isolated photons with high transverse energy have been studied in deep in-elastic ep scattering with the ZEUS detector at HERA, using an integrated luminosity of 326 pb(-1) in the range of exchanged-photon virtuality 10-350 GeV2. Outgoing isolated photons with transverse energy 4 < E-T(gamma) < 15 GeV and pseudorapidity -0.7 < eta(gamma) < 0.9 were measured with accompanying jets having transverse energy and pseudorapidity 2 : 5 < E-T(jet) < 35 GeV and -1.5 < eta(jet) < 1.8, respectively. Differential cross sections are presented for the following variables: the fraction of the incoming photon energy and momentum that is transferred to the outgoing photon and the leading jet; the fraction of the incoming proton energy transferred to the photon and leading jet; the differences in azimuthal angle and pseudorapidity between the outgoing photon and the leading jet and between the outgoing photon and the scattered electron. Comparisons are made with theoretical predictions: a leading-logarithm Monte Carlo simulation, a next-to-leading-order QCD prediction, and a prediction using the k(T)-factorisation approach.
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页数:30
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