Measurement of beauty photoproduction near threshold using di-electron events with the H1 detector at HERA

被引:11
作者
Aaron, F. D. [1 ,47 ]
Alexa, C. [1 ]
Andreev, V. [26 ]
Backovic, S. [31 ]
Baghdasaryan, A. [40 ]
Baghdasaryan, S. [40 ]
Barrelet, E. [30 ]
Bartel, W. [12 ]
Begzsuren, K. [37 ]
Belousov, A. [26 ]
Belov, P. [12 ]
Bizot, J. C. [28 ]
Boudry, V. [29 ]
Bozovic-Jelisavcic, I. [3 ]
Bracinik, J. [4 ]
Brandt, G. [12 ]
Brinkmann, M. [12 ]
Brisson, V. [28 ]
Britzger, D. [12 ]
Bruncko, D. [17 ]
Bunyatyan, A. [14 ,40 ]
Bylinkin, A. [25 ]
Bystritskaya, L. [25 ]
Campbell, A. J. [12 ]
Cantun Avila, K. B. [23 ]
Ceccopieri, F. [5 ,6 ]
Cerny, K. [33 ]
Cerny, V. [17 ]
Chekelian, V. [27 ]
Contreras, J. G. [23 ]
Coughlan, J. A. [7 ]
Cvach, J. [32 ]
Dainton, J. B. [19 ]
Daum, K. [39 ,44 ]
Delcourt, B. [28 ]
Delvax, J. [5 ,6 ]
DeWolf, E. A. [5 ,6 ]
Diaconu, C. [22 ]
Dobre, M. [13 ]
Dodonov, V. [14 ]
Dossanov, A. [13 ,27 ]
Dubak, A. [31 ]
Eckerlin, G. [12 ]
Egli, S. [38 ]
Eliseev, A. [26 ]
Elsen, E. [12 ]
Favart, L. [5 ,6 ]
Fedotov, A. [25 ]
Felst, R. [12 ]
Feltesse, J. [11 ]
机构
[1] NIPNE, Bucharest, Romania
[2] Rhein Westfal TH Aachen, Inst Phys 1, Aachen, Germany
[3] Univ Belgrade, Vinca Inst Nucl Sci, Belgrade 1100, Serbia
[4] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England
[5] Interuniv Inst High Energies ULB VUB, Brussels, Belgium
[6] Univ Antwerp, B-2020 Antwerp, Belgium
[7] STFC, Rutherford Appleton Lab, Didcot, 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, DSM Irfu, CEA, 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] Univ London, Sch Phys & Astron, London, England
[21] Lund Univ, Dept Phys, Lund, Sweden
[22] Aix Marseille Univ, CPPM, CNRS, IN2P3, F-13288 Marseille, France
[23] CINVESTAV, Dept Fis Aplicada, Merida, Yucatan, Mexico
[24] IPN, CINVESTAV, Dept Fis, Mexico City 07738, 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, IN2P3, LAL, F-91405 Orsay, France
[29] Ecole Polytech, CNRS, IN2P3, LLR, Palaiseau, France
[30] Univ Paris 07, CNRS, Univ Paris 06, IN2P3,LPNHE, Paris, France
[31] Univ Montenegro, Fac Sci, Podgorica, Montenegro
[32] Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic
[33] Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic
[34] Univ Roma Tre, Dipartimento Fis, Rome, Italy
[35] INFN Roma 3, Rome, Italy
[36] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria
[37] Mongolian Acad Sci, Inst Phys & Technol, Ulaanbaatar, Mongolia
[38] Paul Scherrer Inst, Villigen, Switzerland
[39] Univ Wuppertal, Fachbereich C, Wuppertal, Germany
[40] Yerevan Phys Inst, Yerevan 375036, Armenia
[41] DESY, Zeuthen, Germany
[42] ETH, Inst Teilchenphys, Zurich, Switzerland
[43] Univ Zurich, Inst Phys, Zurich, Switzerland
[44] Univ Wuppertal, Rechenzentrum, Wuppertal, Germany
[45] Univ Lyon 1, CNRS, IN2P3, IPNL, F-69622 Villeurbanne, France
[46] CERN, Geneva, Switzerland
[47] Univ Bucharest, Fac Phys, Bucharest, Romania
[48] Ulaanbaatar Univ, Ulaanbaatar, Mongolia
[49] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada
[50] Univ Savoie, CNRS, IN2P3, LAPP, Annecy Le Vieux, France
来源
EUROPEAN PHYSICAL JOURNAL C | 2012年 / 72卷 / 10期
基金
俄罗斯基础研究基金会; 英国科学技术设施理事会; 瑞士国家科学基金会;
关键词
DEEP-INELASTIC SCATTERING; LIQUID ARGON CALORIMETER; HEAVY FLAVOR PRODUCTION; FAST-TRACK TRIGGER; MONTE-CARLO; D-ASTERISK; CROSS-SECTIONS; PARTON DISTRIBUTIONS; VERTEX DETECTOR; QCD COHERENCE;
D O I
10.1140/epjc/s10052-012-2148-1
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 cross section for ep -> eb (b) over barX in photoproduction is measured with the H1 detector at the ep-collider HERA. The decay channel b (b) over bar -> eeX' is selected by identifying the semi-electronic decays of the b-quarks. The total production cross section is measured in the kinematic range given by the photon virtuality Q(2) <= 1 GeV2, the inelasticity 0.05 <= y <= 0.65 and the pseudorapidity of the b-quarks vertical bar eta(b)vertical bar, vertical bar eta((b) over bar)vertical bar <= 2. The differential production cross section is measured as a function of the average transverse momentum of the beauty quarks < P-T(b)> down to the threshold. The results are compared to next-to-leading-order QCD predictions.
引用
收藏
页码:1 / 19
页数:19
相关论文
共 79 条
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