Measurement of the production of a W boson in association with a charmed hadron in pp collisions at p s=13 TeV with the ATLAS detector 

被引:7
作者
Aad, G. [159 ]
Abbott, B. [190 ]
Abbott, D. C. [160 ]
Abud, A. Abed [60 ]
Abeling, K. [81 ]
Abhayasinghe, D. K. [150 ]
Abidi, S. H. [240 ]
AbouZeid, O. S. [64 ]
Abraham, N. L. [227 ]
Abramowicz, H. [233 ]
Abreu, H. [232 ]
Abulaiti, Y. [8 ]
Acharya, B. S. [105 ,106 ,268 ]
Achkar, B. [81 ]
Adachi, S. [235 ,236 ]
Adam, L. [157 ]
Bourdarios, C. Adam [7 ]
Adamczyk, L. [136 ]
Adamek, L. [240 ]
Adelman, J. [180 ]
Adersberger, M. [171 ]
Adiguzel, A. [16 ]
Adorni, S. [82 ]
Adye, T. [211 ]
Affolder, A. A. [213 ]
Afik, Y. [232 ]
Agapopoulou, C. [103 ]
Agaras, M. N. [62 ]
Aggarwal, A. [177 ]
Agheorghiesei, C. [42 ]
Aguilar-Saavedra, J. A. [201 ,206 ,280 ]
Ahmadov, F. [129 ]
Ahmed, W. S. [161 ]
Ai, X. [26 ,27 ]
Aielli, G. [120 ,121 ]
Akatsuka, S. [139 ]
Akesson, T. P. A. [153 ]
Akilli, E. [82 ]
Akimov, A., V [168 ]
Al Khoury, K. [103 ]
Alberghi, G. L. [34 ,35 ,36 ]
Albert, J. [251 ]
Verzini, M. J. Alconada [233 ]
Alderweireldt, S. [60 ]
Aleksa, M. [60 ]
Aleksandrov, I. N. [129 ]
Alexa, C. [41 ]
Alexopoulos, T. [12 ]
Alfonsi, A. [178 ,179 ]
Alfonsi, F. [34 ,35 ,36 ]
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, Ankara, Turkiye
[5] Istanbul Aydin Univ, Applicat & Res Ctr Adv Studies, Istanbul, Turkiye
[6] TOBB Univ Econ & Technol, Div Phys, Ankara, Turkiye
[7] Univ Grenoble Alpes, Univ Savoie Mt Blanc, CNRS, IN2P3,LAPP, Annecy, France
[8] Argonne Natl Lab, High Energy Phys Div, 9700 S Cass Ave, Argonne, IL 60439 USA
[9] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
[10] Univ Texas Arlington, Dept Phys, POB 19059, Arlington, TX 76019 USA
[11] Natl & Kapodistrian Univ Athens, Phys Dept, Athens, Greece
[12] Natl Tech Univ Athens, Phys Dept, Zografos, Greece
[13] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA
[14] Bahcesehir Univ, Fac Engn & Nat Sci, Istanbul, Turkiye
[15] Istanbul Bilgi Univ, Fac Engn & Nat Sci, Istanbul, Turkiye
[16] Bogazici Univ, Dept Phys, Istanbul, Turkiye
[17] Gaziantep Univ, Dept Phys Engn, Gaziantep, Turkiye
[18] Azerbaijan Acad Sci, Inst Phys, Baku, Azerbaijan
[19] Barcelona Inst Sci & Technol, Inst Fis Altes Energies IFAE, Barcelona, Spain
[20] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China
[21] Tsinghua Univ, Phys Dept, Beijing, Peoples R China
[22] Nanjing Univ, Dept Phys, Nanjing, Peoples R China
[23] Univ Chinese Acad Sci UCAS, Beijing, Peoples R China
[24] Univ Belgrade, Inst Phys, Belgrade, Serbia
[25] Univ Bergen, Dept Phys & Technol, Bergen, Norway
[26] Lawrence Berkeley Natl Lab, Phys Div, Berkeley, CA USA
[27] Univ Calif Berkeley, Berkeley, CA 94720 USA
[28] Humboldt Univ, Inst Phys, Berlin, Germany
[29] Univ Bern, Albert Einstein Ctr Fundamental Phys, Bern, Switzerland
[30] Univ Bern, Lab High Energy Phys, Bern, Switzerland
[31] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England
[32] Univ Antonio Narino, Fac Ciencias, Bogota, Colombia
[33] Univ Antonio Narino, Ctr Invest, Bogota, Colombia
[34] INFN Bologna, Bologna, Italy
[35] Univ Bologna, Dipartimento Fis, Bologna, Italy
[36] Ist Nazl Fis Nucl, Sez Bologna, Bologna, Italy
[37] Univ Bonn, Phys Inst, Bonn, Germany
[38] Boston Univ, Dept Phys, 590 Commonwealth Ave, Boston, MA 02215 USA
[39] Brandeis Univ, Dept Phys, Waltham, MA 02254 USA
[40] Transilvania Univ Brasov, Brasov, Romania
[41] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania
[42] Alexandru Ioan Cuza Univ, Dept Phys, Iasi, Romania
[43] Natl Inst Res & Dev Isotop & Mol Technol, Phys Dept, Cluj Napoca, Romania
[44] West Univ Timisoara, Timisoara, Romania
[45] Comenius Univ, Fac Math Phys & Informat, Bratislava, Slovakia
[46] Slovak Acad Sci, Dept Subnucl Phys, Inst Expt Phys, Kosice, Slovakia
[47] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA
[48] Univ Buenos Aires, Dept Fis, Buenos Aires, DF, Argentina
[49] Calif State Univ Long Beach, Long Beach, CA 90840 USA
[50] Univ Cambridge, Cavendish Lab, Cambridge, England
基金
巴西圣保罗研究基金会; 英国科学技术设施理事会; 欧盟地平线“2020”; 瑞典研究理事会; 加拿大自然科学与工程研究理事会; 美国国家科学基金会;
关键词
PAIR PRODUCTION; PLUS PLUS; QUARK;
D O I
10.1103/PhysRevD.108.032012
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The production of a W boson in association with a single charm quark is studied using 140 fb(-1) of vS = 13 TeV proton-proton collision data collected with the ATLAS detector at the Large Hadron Collider. ffiffis The charm quark is tagged by the presence of a charmed hadron reconstructed with a secondary-vertex fit. The W boson is reconstructed from the decay to either an electron or a muon and the missing transverse momentum present in the event. The charmed mesons reconstructed are D+ ?K-p+p+ and D*+ ? D0p+ ? (K-p+)p+ and the charge conjugate decays in the fiducial regions where pT(e; mu) > 30 GeV, l?(e; mu)l < 2.5, pT(D(*)) > 8 GeV, and l?(D(*))l < 2.2. The integrated and normalized differential cross sections as a function of the pseudorapidity of the lepton from the W boson decay, and of the transverse momentum of the charmed hadron, are extracted from the data using a profile likelihood fit. The measured total fiducial cross sections are sfidOS-SS(W- + D+) = 50.2 + 0.2(stat)+2.4 -2.3(syst) pb, s(OS-SS) (fid)(W- + D+) = 48.5 + 0.2(stat)+2.3-2.2(syst) pb, sfidOS-SS(W- + D*+) = 51.1 + 0.4(stat)+1.9 -1.8 (syst) pb, and s(OS-SS) (fid)(W+ + D*-) = 50.0 + 0.4(stat)+1.9 -1.8 (syst) pb. Results are compared with the predictions of next-to-leading-order quantum chromodynamics calculations performed using state-of-the-art parton distribution functions. Additionally, the ratio of charm to anticharm production cross sections is studied to probe the s -s- quark asymmetry. The ratio is found to be R+ c = 0.971 + 0.006(stat) + 0.011(syst). The ratio and cross-section measurements are consistent with the predictions obtained with parton distribution function sets that have a symmetric s -s- sea, indicating that any s -s- asymmetry in the Bjorken-x region relevant for this measurement is small.
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页数:54
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