Measurement of the top quark pair production charge asymmetry in proton-proton collisions at 7 TeV using the ATLAS detector - IN2P3 - Institut national de physique nucléaire et de physique des particules
Article Dans Une Revue Journal of High Energy Physics Année : 2014

Measurement of the top quark pair production charge asymmetry in proton-proton collisions at 7 TeV using the ATLAS detector

G. Aad , S. Albrand (1) , J. Brown (1) , Q. Buat (1) , B. Clement (1) , J. Collot (1) , S. Crépé-Renaudin (1) , B. Dechenaux (1) , T. Delemontex (1) , P.A. Delsart (1) , C. Gabaldon (1) , M.H. Genest (1) , J.Y. Hostachy (1) , E. Laisne (1) , B.T. Le (1) , F. Ledroit-Guillon (1) , A. Lleres (1) , A. Lucotte (1) , F. Malek (1) , C. Monini (1) , J. Stark (1) , X. Sun (1) , B. Trocmé (1) , G. Rahal (2) , D. Boumediene (3) , Emmanuel Busato (3) , D. Calvet (3) , S. Calvet (3) , J. Donini (3) , E. Dubreuil (3) , N. Ghodbane (3) , Ph. Gris (3) , C. Guicheney (3) , H. Liao (3) , D. Pallin (3) , Daniela Paredes Hernández (3) , F. Podlyski (3) , C. Santoni (3) , Timothée Theveneaux-Pelzer (3) , Loïc Valery (3) , F. Vazeille (3) , L. Alio (4) , M. Barbero (4) , C. P. Bee (4) , C. Bertella (4) , N. Bousson (4) , J. C. Clémens (4) , Y. Coadou (4) , F. Djama (4) , F. Etienne (4) , L. Feligioni (4) , D. Hoffmann (4) , F. Hubaut (4) , E. B. F. G. Knoops (4) , E. Le Guirriec (4) , B. Li (4) , J. Maurer (4) , E. Monnier (4) , Y. Nagai (4) , P. Pralavorio (4) , A. Rozanov (4) , T. Serre (4) , M. Talby (4) , N. Tannoury (4) , E. Tiouchichine (4) , S. Tisserant (4) , J. Toth (4) , F. Touchard (4) , M. Ughetto (4) , L. Vacavant (4) , S. Abdel Khalek (5) , E. Augé (5) , A. Bassalat (5) , S. Binet (5) , C. Bourdarios (5) , C. de La Taille (5) , J.B. de Vivie de Regie (5) , L. Duflot (5) , M. Escalier (5) , L. Fayard (5) , D. Fournier (5) , J.-F. Grivaz (5) , T. Guillemin (5) , S. Henrot-Versillé (5) , J. Hrivnac (5) , L. Iconomidou-Fayard (5) , J. Idarraga (5) , M. Kado (5) , N. Lorenzo Martinez (5) , A. Lounis (5) , N. Makovec (5) , L. Poggioli (5) , P. Puzo (5) , A. Renaud (5) , D. Rousseau (5) , G. Rybkin (5) , J.B. Sauvan (5) , J. Schaarschmidt (5) , A.C. Schaffer (5) , E. Scifo (5) , L. Serin (5) , S. Simion (5) , R. Tanaka (5) , H.L. Tran (5) , D. Zerwas (5) , Zhiqing Zhang (5) , N. Berger (6) , J. Colas (6) , M. Delmastro (6) , L. Di Ciaccio (6) , T.K.O. Doan (6) , S. Elles (6) , C. Goy (6) , T. Hryn'Ova (6) , S. Jézéquel (6) , H. Keoshkerian (6) , R. Lafaye (6) , J. Leveque (6) , V.P. Lombardo (6) , N. Massol (6) , P. Perrodo (6) , E. Petit (6) , H. Przysiezniak (6) , G. Sauvage (6) , E. Sauvan (6) , M. Schwoerer (6) , T. Todorov (6) , I. Wingerter-Seez (6) , R. Zitoun (6) , I. Koletsou (6) , O. Simard (6)
G. Aad
Y. Coadou
E. Monnier
E. Augé
D. Rousseau
D. Zerwas
  • Fonction : Auteur
  • PersonId : 842996
Zhiqing Zhang
  • Fonction : Auteur
  • PersonId : 829631
N. Berger
C. Goy
T. Hryn'Ova

Résumé

This letter presents a measurement of the top quark pair (tt) production charge asymmetry Ac using 4.7 fb-1 of proton-proton collisions at a centre-of-mass energy of 7 TeV collected by the ATLAS detector at the LHC. A tt-enriched sample of events with a single lepton (electron or muon), missing transverse momentum and at least four high transverse momentum jets, of which at least one is tagged as coming from a b-quark, is selected. A likelihood fit is used to reconstruct the tt event kinematics. A Bayesian unfolding procedure is employed to estimate Ac at the parton-level. The measured value of the tt production charge asymmetry is 0.006 +/- 0.010, where the uncertainty includes both the statistical and the systematic components. Differential Ac measurements as a function of the invariant mass, the rapidity and the transverse momentum of the tt-system are also presented. In addition, Ac is measured for a subset of events with large tt velocity, where physics beyond the Standard Model could contribute. All measurements are consistent with the Standard Model predictions.
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in2p3-00909853 , version 1 (07-06-2021)

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G. Aad, S. Albrand, J. Brown, Q. Buat, B. Clement, et al.. Measurement of the top quark pair production charge asymmetry in proton-proton collisions at 7 TeV using the ATLAS detector. Journal of High Energy Physics, 2014, 2, pp.107. ⟨10.1007/JHEP02(2014)107⟩. ⟨in2p3-00909853⟩
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