Article Dans Une Revue Physical Review D Année : 2016

Measurements of the charge asymmetry in top-quark pair production in the dilepton final state at s√=8 TeV with the ATLAS detector

G. Aad (1) , Z. Barnovska (2) , N. Berger (2) , M. Delmastro (2) , L. Di Ciaccio (2) , S. Elles (2) , K. Grevtsov (2) , T. Guillemin (2) , T. Hryn’ova (2) , S. Jézéquel (2) , I. Koletsou (2) , R. Lafaye (2) , Jérémy Lévêque (2) , P. Mastrandea (2) , G. Sauvage (2) , E. Sauvan (2) , O. Simard (2) , B.H. Smart (2) , T. Todorov (2) , I. Wingerter-Seez (2) , E. Yatsenko (2) , M. Barbero (1) , A. Calandri (1) , T.P. Calvet (1) , Y. Coadou (1) , C. Diaconu (1) , Sara Diglio (1) , F. Djama (1) , V. Ellajosyula (1) , L. Feligioni (1) , J. Gao (1) , A. Hadef (1) , G.D. Hallewell (1) , F. Hubaut (1) , S.J. Kahn (1) , E. B. F. G. Knoops (1) , E. Le Guirriec (1) , J. Liu (1) , K. Liu , D. Madaffari (1) , K. Mochizuki (1) , E. Monnier (1) , S. Muanza (1) , E. Nagy (1) , P. Pralavorio (1) , Y. Rodina (1) , A. Rozanov (1) , M. Talby (1) , T. Theveneaux-Pelzer (1) , R.E. Ticse Torres (1) , S. Tisserant (1) , J. Toth (1) , F. Touchard (1) , L. Vacavant (1) , Chen Wang (1) , S. Albrand (3) , S. Berlendis (3) , C. Camincher (3) , J. Collot (3) , S. Crépé-Renaudin (3) , P.A. Delsart (3) , C. Gabaldon (3) , M.H. Genest (3) , J. Gradin (3) , J.Y. Hostachy (3) , F. Ledroit-Guillon (3) , A. Lleres (3) , A. Lucotte (3) , F. Malek (3) , E. Petit (3) , J. Stark (3) , B. Trocmé (3) , M. Wu (3) , M.K. Ayoub (4) , A. Bassalat (4) , S. Binet (4) , C. Becot (4) , C. Bourdarios (4) , J.B. de Vivie de Regie (4) , D. Delgove (4) , L. Duflot (4) , M. Escalier (4) , L. Fayard (4) , D. Fournier (4) , E.L. Gkougkousis (4) , J.-F. Grivaz (4) , F. Hariri (4) , S. Henrot-Versille (4) , J. Hrivnac (4) , L. Iconomidou-Fayard (4) , M. Kado (4) , A. Lounis (4) , N. Makovec (4) , N. Morange (4) , C. Nellist (4) , P. Petroff (4) , L. Poggioli (4) , P. Puzo (4) , A. Renaud (4) , G. Rybkin (4) , D. Rousseau (4) , A.C. Schaffer (4) , L. Serin (4) , E. Scifo (4) , S. Simion (4) , R. Tanaka (4) , D. Zerwas (4) , Zhongkai Zhang (4) , Y. Zhao (4) , D. Boumediene (5) , E. Busato (5) , D. Calvet (5) , S. Calvet (5) , A.R. Chomont (5) , J. Donini (5) , Ph. Gris (5) , H. Liao (5) , R. Madar (5) , D. Pallin (5) , S.M. Romano Saez (5) , C. Santoni (5) , D. Simon (5) , F. Vazeille (5)
K. Liu
  • Fonction : Auteur

Résumé

Measurements of the top--antitop quark pair production charge asymmetry in the dilepton channel are presented using data corresponding to an integrated luminosity of 20.3 fb−1 from pp collisions at a center-of-mass energy of s√=8 TeV collected with the ATLAS detector at the Large Hadron Collider at CERN. Inclusive and differential measurements as a function of the invariant mass, transverse momentum, and longitudinal boost of the tt¯ system are performed both in the full phase space and in a fiducial phase space closely matching the detector acceptance. Two observables are studied: AℓℓC based on the selected leptons and Att¯C based on the reconstructed tt¯ final state. The inclusive asymmetries are measured in the full phase space to be AℓℓC=0.008±0.006 and Att¯C=0.021±0.016, which are in agreement with the Standard Model predictions of AℓℓC=0.0064±0.0003 and Att¯C=0.0111±0.0004.

Dates et versions

in2p3-01304651 , version 1 (20-04-2016)

Identifiants

Citer

G. Aad, Z. Barnovska, N. Berger, M. Delmastro, L. Di Ciaccio, et al.. Measurements of the charge asymmetry in top-quark pair production in the dilepton final state at s√=8 TeV with the ATLAS detector. Physical Review D, 2016, 94, pp.032006 ⟨10.1103/PhysRevD.94.032006⟩. ⟨in2p3-01304651⟩
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