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

页码：1 / 19

页数：19

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