Measurement of the differential γ+2b-jet cross section and the ration σ(γ+2b-jets)/σ(γ plus b-jet) in p(p)over-bar collisions at √s=1.96 TeV

被引:6
作者
Abazov, V. M. [33 ]
Abbott, B. [70 ]
Acharya, B. S. [27 ]
Adams, M. [47 ,49 ]
Adams, T.
Agnew, J. P. [44 ]
Alexeev, G. D. [33 ]
Alkhazov, G. [37 ]
Alton, A. [59 ]
Askew, A. [47 ]
Atkins, S. [57 ]
Augsten, K. [7 ]
Avila, C. [5 ]
Badaud, F. [10 ]
Bagby, L. [48 ]
Baldin, B. [48 ]
Bandurin, D. V. [76 ]
Banerjee, S. [27 ]
Barberis, E. [58 ]
Baringer, P. [56 ]
Bartlett, J. F. [48 ]
Bassler, U. [16 ]
Bazterra, V. [49 ]
Bean, A. [56 ]
Begalli, M. [2 ]
Bellantoni, L. [48 ]
Beri, S. B. [25 ]
Bernardi, G. [14 ,15 ]
Bernhard, R. [21 ]
Bertram, I. [42 ]
Besancon, M. [16 ]
Beuselinck, R. [43 ]
Bhat, P. C. [48 ]
Bhatia, S. [61 ]
Bhatnagar, V. [25 ]
Blazey, G. [50 ]
Blessing, S. [47 ]
Bloom, K. [62 ]
Boehnlein, A. [48 ]
Boline, D. [67 ]
Boos, E. E. [35 ]
Borissov, G. [42 ]
Borysova, M. [41 ]
Brandt, A. [73 ]
Brandt, O. [22 ]
Brock, R. [60 ]
Bross, A. [48 ]
Brown, D. [14 ,15 ]
Bu, X. B. [48 ]
Buehler, M. [48 ]
机构
[1] Ctr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, Brazil
[2] Univ Estado Rio de Janeiro, BR-20550011 Rio De Janeiro, Brazil
[3] Univ Fed ABC, Santo Andre, Brazil
[4] Univ Sci & Technol China, Hefei 230026, Peoples R China
[5] Univ Los Andes, Bogota, Colombia
[6] Charles Univ Prague, Fac Math & Phys, Ctr Particle Phys, Prague, Czech Republic
[7] Czech Tech Univ, CR-16635 Prague, Czech Republic
[8] Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic
[9] Univ San Francisco, Quito, Ecuador
[10] Univ Blaise Pascal, CNRS, IN2P3, LPC, Clermont, France
[11] Univ Grenoble 1, CNRS, IN2P3, Inst Natl Polytech Grenoble,LPSC, Grenoble, France
[12] Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France
[13] Univ Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, France
[14] Univ Paris 06, LPNHE, Paris, France
[15] Univ Paris 07, CNRS, IN2P3, Paris, France
[16] CEA Saclay, Irfu, Saclay, France
[17] Univ Strasbourg, IPHC, CNRS, IN2P3, Strasbourg, France
[18] Univ Lyon 1, IPNL, CNRS, IN2P3, Villeurbanne, France
[19] Univ Lyon, Lyon, France
[20] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany
[21] Univ Freiburg, Inst Phys, Freiburg, Germany
[22] Univ Gottingen, Inst Phys 2, D-37073 Gottingen, Germany
[23] Johannes Gutenberg Univ Mainz, Inst Phys, D-55122 Mainz, Germany
[24] Univ Munich, Munich, Germany
[25] Punjab Univ, Chandigarh 160014, India
[26] Univ Delhi, Delhi 110007, India
[27] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India
[28] Univ Coll Dublin, Dublin 2, Ireland
[29] Korea Univ, Korea Detector Lab, Seoul, South Korea
[30] CINVESTAV, Mexico City 14000, DF, Mexico
[31] Nikhef, Amsterdam, Netherlands
[32] Radboud Univ Nijmegen, NL-6525 ED Nijmegen, Netherlands
[33] Joint Inst Nucl Res Dubna, Dubna, Russia
[34] Inst Theoret & Expt Phys, Moscow 117259, Russia
[35] Moscow MV Lomonosov State Univ, Moscow, Russia
[36] Inst High Energy Phys, Protvino, Russia
[37] Petersburg Nucl Phys Inst, St Petersburg, Russia
[38] Inst Catalana Recerca & Estudis Avancats, Barcelona, Spain
[39] Inst Fis Altes Energies, Barcelona, Spain
[40] Uppsala Univ, Uppsala, Sweden
[41] Taras Shevchenko Natl Univ Kyiv, Kiev, Ukraine
[42] Univ Lancaster, Lancaster LA1 4YB, England
[43] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England
[44] Univ Manchester, Manchester M13 9PL, Lancs, England
[45] Univ Arizona, Tucson, AZ 85721 USA
[46] Univ Calif Riverside, Riverside, CA 92521 USA
[47] Florida State Univ, Tallahassee, FL 32306 USA
[48] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA
[49] Univ Illinois, Chicago, IL 60607 USA
[50] Univ Illinois, De Kalb, IL 60115 USA
基金
美国国家科学基金会; 瑞典研究理事会; 巴西圣保罗研究基金会;
关键词
PARTON DISTRIBUTIONS; IDENTIFICATION; PHOTONS;
D O I
10.1016/j.physletb.2014.09.007
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present the first measurements of the differential cross section d sigma/dp(T)(gamma) for the production of an isolated photon in association with at least two b-quark jets. The measurements consider photons with rapidities vertical bar y(gamma)vertical bar < 1.0 and transverse momenta 30 < p(T)(gamma) < 200 GeV. The b-quark jets are required to have p(T)(jet) > 15 GeVand vertical bar y(jet)vertical bar < 1.5. The ratio of differential production cross sections for gamma + 2 b-jets to gamma + b-jet as a function of p(T)(gamma) is also presented. The results are based on the proton-antiproton collision data at root s = 1.96 TeV collected with the D0 detector at the Fermilab Tevatron Collider. The measured cross sections and their ratios are compared to the next- to- leading order perturbative QCD calculations as well as predictions based on the k(T)- factorization approach and those from the sherpa and pythia Monte Carlo event generators. (C) 2014 Published by Elsevier B.V.
引用
收藏
页码:357 / 365
页数:9
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