Measurement of the production of a W boson in association with a charm quark in pp collisions at √s=7 TeV with the ATLAS detector

被引:0
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作者
Aad, G. [118 ,119 ]
Abajyan, T. [32 ]
Abbott, B. [151 ]
Abdallah, J. [215 ]
Khalek, S. Abdel [155 ,156 ]
Abdinov, O. [15 ]
Aben, R. [144 ,145 ]
Abi, B. [152 ]
Abolins, M. [124 ]
AbouZeid, O. S. [223 ]
Abramowicz, H. [217 ]
Abreu, H. [195 ]
Abulaiti, Y. [208 ,209 ]
Acharya, B. S. [230 ,231 ,251 ]
Adamczyk, L. [61 ]
Adams, D. L. [39 ]
Addy, T. N. [83 ]
Adelman, J. [248 ]
Adomeit, S. [135 ]
Adye, T. [180 ]
Agatonovic-Jovin, T. [19 ]
Aguilar-Saavedra, J. A. [167 ,172 ,173 ]
Agustoni, M. [24 ,25 ]
Ahlen, S. P. [33 ]
Ahmad, A. [211 ,212 ]
Ahmadov, F. [15 ,93 ]
Aielli, G. [185 ,186 ]
Akesson, T. P. A. [114 ]
Akimoto, G. [219 ,220 ]
Akimov, A. V. [131 ]
Albert, J. [241 ]
Albrand, S. [80 ,81 ,82 ]
Alconada Verzini, M. J. [99 ,100 ]
Aleksa, M. [46 ]
Aleksandrov, I. N. [93 ]
Alexa, C. [40 ]
Alexander, G. [217 ]
Alexandre, G. [72 ]
Alexopoulos, T. [14 ]
Alhroob, M. [230 ,232 ]
Alimonti, G. [125 ]
Alio, L. [118 ,119 ]
Alison, J. [47 ]
Allbrooke, B. M. M. [26 ]
Allison, L. J. [101 ]
Allport, P. P. [104 ]
Allwood-Spiers, S. E. [78 ]
Almond, J. [117 ]
Aloisio, A. [140 ,141 ]
Alon, R. [244 ]
机构
[1] Univ Adelaide, Dept Phys, Adelaide, SA, Australia
[2] SUNY Albany, Dept Phys, Albany, NY 12222 USA
[3] Univ Alberta, Dept Phys, Edmonton, AB, Canada
[4] Ankara Univ, Dept Phys, TR-06100 Ankara, Turkey
[5] Gazi Univ, Dept Phys, Ankara, Turkey
[6] TOBB Univ Econ & Technol, Div Phys, Ankara, Turkey
[7] Turkish Atom Energy Commiss, Ankara, Turkey
[8] CNRS, IN2P3, LAPP, Annecy Le Vieux, France
[9] Univ Savoie, Annecy Le Vieux, France
[10] Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA
[11] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
[12] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA
[13] Univ Athens, Dept Phys, Athens, Greece
[14] Natl Tech Univ Athens, Dept Phys, Zografos, Greece
[15] Azerbaijan Acad Sci, Inst Phys, Baku 370143, Azerbaijan
[16] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain
[17] Univ Autonoma Barcelona, Dept Fis, E-08193 Barcelona, Spain
[18] Univ Belgrade, Inst Phys, Belgrade, Serbia
[19] Univ Belgrade, Vinca Inst Nucl Sci, Belgrade, Serbia
[20] Univ Bergen, Dept Phys & Technol, Bergen, Norway
[21] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA
[22] Univ Calif Berkeley, Berkeley, CA 94720 USA
[23] Humboldt Univ, Dept Phys, D-10099 Berlin, Germany
[24] Univ Bern, Albert Einstein Ctr Fundamental Phys, Bern, Switzerland
[25] Univ Bern, High Energy Phys Lab, Bern, Switzerland
[26] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England
[27] Bogazici Univ, Dept Phys, Istanbul, Turkey
[28] Dogus Univ, Dept Phys, Istanbul, Turkey
[29] Gaziantep Univ, Dept Engn Phys, Gaziantep, Turkey
[30] Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy
[31] Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy
[32] Univ Bonn, Inst Phys, Bonn, Germany
[33] Boston Univ, Dept Phys, Boston, MA 02215 USA
[34] Brandeis Univ, Dept Phys, Waltham, MA 02254 USA
[35] Univ Fed Rio de Janeiro, COPPE EE IF, Rio De Janeiro, Brazil
[36] Fed Univ Juiz de Fora UFJF, Juiz De Fora, Brazil
[37] Fed Univ Sao Joao del Rei UFSJ, Sao Joao Del Rei, Brazil
[38] Univ Sao Paulo, Inst Fis, BR-01498 Sao Paulo, Brazil
[39] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA
[40] Natl Inst Phys & Nucl Engn, Bucharest, Romania
[41] Natl Inst Res & Dev Isotop & Mol Technol, Dept Phys, Cluj Napoca, Romania
[42] Univ Politehn Bucuresti, Bucharest, Romania
[43] Univ Buenos Aires, Dept Fis, Buenos Aires, DF, Argentina
[44] Cavendish Lab, Cambridge, England
[45] Carleton Univ, Dept Phys, Ottawa, ON K1S 5B6, Canada
[46] CERN, Geneva, Switzerland
[47] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[48] Pontificia Univ Catolica Chile, Dept Fis, Santiago, Chile
[49] Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso, Chile
[50] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China
来源
基金
美国国家科学基金会;
关键词
Electroweak interaction; Hadron-Hadron Scattering; Charm physics; PARTON DISTRIBUTIONS; MONTE-CARLO; PAIR PRODUCTION; CROSS-SECTION; DECAY; TEVATRON;
D O I
10.1007/JHEP05(2014)068
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 a W boson in association with a single charm quark is studied using 4.6 fb(-1) of pp collision data at root s = 7 TeV collected with the ATLAS detector at the Large Hadron Collider. In events in which a W boson decays to an electron or muon, the charm quark is tagged either by its semileptonic decay to a muon or by the presence of a charmed meson. The integrated and differential cross sections as a function of the pseudorapidity of the lepton from the W-boson decay are measured. Results are compared to the predictions of next-to-leading-order QCD calculations obtained from various parton distribution function parameterisations. The ratio of the strange-to-down sea-quark distributions is determined to be 0.96(-0.30)(+0.26) at Q (2) = 1.9 GeV2, which supports the hypothesis of an SU(3)-symmetric composition of the light-quark sea. Additionally, the cross-section ratio sigma(W (+) +)/sigma(W (-) + c) is compared to the predictions obtained using parton distribution function parameterisations with different assumptions about the s-(s) over bar quark asymmetry.
引用
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页码:1 / 67
页数:67
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