Measurement of top quark polarization in top-antitop events from proton-proton collisions at sqrt(s) = 7 TeV using the ATLAS detector - Université Clermont Auvergne Accéder directement au contenu
Article Dans Une Revue Physical Review Letters Année : 2013

Measurement of top quark polarization in top-antitop events from proton-proton collisions at sqrt(s) = 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) , L. Alio (3) , M. Barbero (3) , C.P. Bee (3) , C. Bertella (3) , N. Bousson (3) , J.C. Clémens (3) , Y. Coadou (3) , F. Djama (3) , F. Etienne (3) , L. Feligioni (3) , D. Hoffmann (3) , F. Hubaut (3) , E. B. F. G. Knoops (3) , E. Le Guirriec (3) , B. Li (3) , J. Maurer (3) , E. Monnier (3) , Y. Nagai (3) , J. Odier (3) , P. Pralavorio (3) , A. Rozanov (3) , T. Serre (3) , M. Talby (3) , N. Tannoury (3) , E. Tiouchichine (3) , S. Tisserant (3) , J. Toth (3) , F. Touchard (3) , M. Ughetto (3) , L. Vacavant (3) , D. Boumediene (4) , Emmanuel Busato (4) , D. Calvet (4) , S. Calvet (4) , J. Donini (4) , E. Dubreuil (4) , N. Ghodbane (4) , Ph. Gris (4) , C. Guicheney (4) , H. Liao (4) , D. Pallin (4) , Daniela Paredes Hernández (4) , F. Podlyski (4) , C. Santoni (4) , Timothée Theveneaux-Pelzer (4) , Loïc Valery (4) , F. Vazeille (4) , S. Abdel Khalek (5) , E. Augé (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) , F. Niedercorn (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) , M. Teinturier (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) , M. Maeno (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)
G. Aad
Y. Coadou
S. Calvet
E. Augé
D. Rousseau
Zhiqing Zhang
  • Fonction : Auteur
  • PersonId : 829631
N. Berger
C. Goy
T. Hryn'Ova

Résumé

This Letter presents measurements of the polarization of the top quark in top-antitop quark pair events, using 4.7 fb^-1 of proton-proton collision data recorded with the ATLAS detector at the Large Hadron Collider at sqrt(s) = 7 TeV. Final states containing one or two isolated leptons (electrons or muons) and jets are considered. Two measurements of alpha_l P, the product of the leptonic spin-analyzing power and the top quark polarization, are performed assuming that the polarization is introduced by either a CP conserving (CPC) or a CP violating (CPV) production process. The measurements obtained, alpha_l P_CPC = -0.035 +/- 0.014 (stat) +/- 0.037 (syst) and alpha_l P_CPV = 0.020 +/- 0.016 (stat) +0.013 -0.017 (syst), are in good agreement with the Standard Model prediction of negligible top quark polarization.
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Dates et versions

in2p3-00847976 , version 1 (25-09-2023)

Identifiants

Citer

G. Aad, S. Albrand, J. Brown, Q. Buat, B. Clement, et al.. Measurement of top quark polarization in top-antitop events from proton-proton collisions at sqrt(s) = 7 TeV using the ATLAS detector. Physical Review Letters, 2013, 111, pp.232002. ⟨10.1103/PhysRevLett.111.232002⟩. ⟨in2p3-00847976⟩
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