Skip to Main content Skip to Navigation
Journal articles

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
Abstract : 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.
Document type :
Journal articles
Complete list of metadata

http://hal.in2p3.fr/in2p3-00909853
Contributor : Emmanuelle Vernay <>
Submitted on : Monday, June 7, 2021 - 11:50:05 AM
Last modification on : Thursday, June 17, 2021 - 3:46:30 AM

File

Aad2014_Article_MeasurementOfT...
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Citation

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, Springer, 2014, 2, pp.107. ⟨10.1007/JHEP02(2014)107⟩. ⟨in2p3-00909853⟩

Share

Metrics

Record views

704

Files downloads

52