Measurement of the production of a W boson in association with a charm quark in pp collisions at sqrt(s)=7 TeV with the ATLAS detector - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Journal of High Energy Physics Year : 2014

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

G. Aad (1) , S. Albrand (2) , J. Brown (2) , B. Clement (2) , J. Collot (2) , S. Crépé-Renaudin (2) , B. Dechenaux (2) , P.A. Delsart (2) , C. Gabaldon (2) , M.H. Genest (2) , J.Y. Hostachy (2) , B.T. Le (2) , F. Ledroit-Guillon (2) , A. Lleres (2) , A. Lucotte (2) , F. Malek (2) , C. Monini (2) , J. Stark (2) , B. Trocmé (2) , G. Rahal (3) , S. Abdel Khalek (4) , E. Augé (4) , A. Bassalat (4) , S. Binet (4) , C. Bourdarios (4) , C. de La Taille (4) , J.B. de Vivie de Regie (4) , L. Duflot (4) , M. Escalier (4) , L. Fayard (4) , D. Fournier (4) , J.-F. Grivaz (4) , T. Guillemin (4) , S. Henrot-Versillé (4) , J. Hrivnac (4) , L. Iconomidou-Fayard (4) , J. Idarraga (4) , M. Kado (4) , N. Lorenzo Martinez (4) , A. Lounis (4) , N. Makovec (4) , L. Poggioli (4) , P. Puzo (4) , A. Renaud (4) , D. Rousseau (4) , G. Rybkin (4) , J.B. Sauvan (5) , J. Schaarschmidt (4) , A.C. Schaffer (4) , E. Scifo (4) , L. Serin (4) , S. Simion (4) , R. Tanaka (4) , H.L. Tran (4) , D. Zerwas (4) , Zhiqing Zhang (4) , D. Boumediene (6) , Emmanuel Busato (6) , D. Calvet (6) , S. Calvet (6) , J. Donini (6) , E. Dubreuil (6) , N. Ghodbane (6) , Ph. Gris (6) , C. Guicheney (6) , H. Liao (6) , D. Pallin (6) , Daniela Paredes Hernández (6) , F. Podlyski (6) , C. Santoni (6) , Timothée Theveneaux-Pelzer (6) , Loïc Valery (6) , F. Vazeille (6) , L. Alio (1) , M. Barbero (1) , C. Bertella (1) , J. C. Clémens (1) , Y. Coadou (1) , F. Djama (1) , L. Feligioni (1) , D. Hoffmann (1) , F. Hubaut (1) , E. B. F. G. Knoops (1) , E. Le Guirriec (1) , B. Li (1) , D. Madaffari (1) , K. Mochizuki (1) , E. Monnier (1) , Y. Nagai (1) , J. Odier (1) , P. Pralavorio (1) , A. Rozanov (1) , T. Serre (1) , M. Talby (1) , N. Tannoury (1) , E. Tiouchichine (1) , S. Tisserant (1) , J. Toth (1) , F. Touchard (1) , M. Ughetto (1) , L. Vacavant (1) , Z. Barnovska (7) , N. Berger (7) , M. Delmastro (7) , L. Di Ciaccio (7) , T.K.O. Doan (7) , S. Elles (7) , C. Goy (7) , T. Hryn'Ova (7) , S. Jézéquel (7) , H. Keoshkerian (7) , R. Lafaye (7) , J. Leveque (7) , V.P. Lombardo (7) , N. Massol (7) , H. Przysiezniak (7) , G. Sauvage (7) , E. Sauvan (7) , M. Schwoerer (7) , T. Todorov (7) , I. Wingerter-Seez (7) , I. Koletsou (7) , O. Simard (7)
G. Aad
E. Augé
D. Rousseau
Zhiqing Zhang
  • Function : Author
  • PersonId : 829631
S. Calvet
Y. Coadou
N. Berger
C. Goy
T. Hryn'Ova

Abstract

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 sqrt(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 +0.26 -0.30 at Q^2=1.9 GeV^2, which supports the hypothesis of an SU(3)-symmetric composition of the light-quark sea. Additionally, the cross-section ratio sigma(W^+ + bar{c})/sigma(W^- + c) is compared to the predictions obtained using parton distribution function parameterisations with different assumptions about the s-bar{s} quark asymmetry.

Dates and versions

in2p3-00951983 , version 1 (26-02-2014)

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Cite

G. Aad, S. Albrand, J. Brown, B. Clement, J. Collot, et al.. Measurement of the production of a W boson in association with a charm quark in pp collisions at sqrt(s)=7 TeV with the ATLAS detector. Journal of High Energy Physics, 2014, 5, pp.068. ⟨10.1007/JHEP05(2014)068⟩. ⟨in2p3-00951983⟩
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