Measurement of the top pair production cross-section in 8 TeV proton-proton collisions using kinematic information in the lepton+jets final state with ATLAS

G. Aad 1 M.K. Ayoub 2 A. Bassalat 2 C. Becot 2 S. Binet 2 C. Bourdarios 2 J.B. de Vivie De Regie 2 D. Delgove 2 L. Duflot 2 M. Escalier 2 L. Fayard 2 D. Fournier 2 E.L. Gkougkousis 2 J.-F. Grivaz 2 T. Guillemin 2 F. Hariri 2 S. Henrot-Versillé 2 J. Hrivnac 2 L. Iconomidou-Fayard 2 M. Kado 2 A. Lounis 2 N. Makovec 2 N. Morange 2 C. Nellist 2 L. Poggioli 2 P. Puzo 2 A. Renaud 2 D. Rousseau 2 G. Rybkin 2 A.C. Schaffer 2 E. Scifo 2 L. Serin 2 S. Simion 2 R. Tanaka 2 H.L. Tran 2 D. Zerwas 2 Zhongkai Zhang 2 Y. Zhao 2 G. Rahal 3 Z. Barnovska 4 N. Berger 4 M. Delmastro 4 L. Di Ciaccio 4 S. Elles 4 T. Hryn’ova 4 S. Jézéquel 4 I. Koletsou 4 R. Lafaye 4 J. Leveque 4 N. Massol 4 G. Sauvage 4 E. Sauvan 4 M. Schwoerer 4 O. Simard 4 T. Todorov 4 I. Wingerter-Seez 4 L. Alio 1 M. Barbero 1 Y. Coadou 1 C. Diaconu 1 S. Diglio 1 F. Djama 1 L. Feligioni 1 J. Gao 1, 5 G.D. Hallewell 1 F. Hubaut 1 S.J. Kahn 1 E. B. F. G. Knoops 1 E. Le Guirriec 1 B. Li 1 J. Liu 6 K. Liu 1 D. Madaffari 1 K. Mochizuki 1 E. Monnier 1 S. Muanza 1 Y. Nagai 1 E. Nagy 1 P. Pralavorio 1 A. Rozanov 1 T. Serre 1 M. Talby 1 R.E. Ticse Torres 1 E. Tiouchichine 1 S. Tisserant 1 J. Toth 1 F. Touchard 1 M. Ughetto 1 L. Vacavant 1 S. Albrand 7 J. Brown 7 J. Collot 7 S. Crépé-Renaudin 7 P.A. Delsart 7 C. Gabaldon 7 M.H. Genest 7 J.Y. Hostachy 7 F. Ledroit-Guillon 7 A. Lleres 7 A. Lucotte 7 F. Malek 7 C. Monini 7 J. Stark 7 B. Trocmé 7 M. Wu 7 D. Boumediene 8 Emmanuel Busato 8 D. Calvet 8 S. Calvet 8 J. Donini 8 E. Dubreuil 8 N. Ghodbane 8 G. Gilles 8 Ph. Gris 8 H. Liao 8 R. Madar 8 D. Pallin 8 S.M. Romano Saez 8 C. Santoni 8 D. Simon 8 Timothée Theveneaux-Pelzer 8 F. Vazeille 8
Abstract : A measurement is presented of the tt¯ inclusive production cross-section in pp collisions at a center-of-mass energy of s√=8 TeV using data collected by the ATLAS detector at the CERN Large Hadron Collider. The measurement was performed in the lepton+jets final state using a data set corresponding to an integrated luminosity of 20.3 fb−1. The cross-section was obtained using a likelihood discriminant fit and b-jet identification was used to improve the signal-to-background ratio. The inclusive tt¯ production cross-section was measured to be 260±1(stat.)+20−21(syst.)±8(lumi.)±4(beam) pb assuming a top-quark mass of 172.5 GeV, in good agreement with the theoretical prediction of 253+13−15 pb. The tt¯→(e,μ)+jets production cross-section in the fiducial region determined by the detector acceptance is also reported.
Type de document :
Article dans une revue
Physical Review D, American Physical Society, 2015, 91 (11), pp.112013. 〈10.1103/PhysRevD.91.112013〉
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Soumis le : vendredi 17 avril 2015 - 15:30:28
Dernière modification le : jeudi 11 octobre 2018 - 15:40:03

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G. Aad, M.K. Ayoub, A. Bassalat, C. Becot, S. Binet, et al.. Measurement of the top pair production cross-section in 8 TeV proton-proton collisions using kinematic information in the lepton+jets final state with ATLAS. Physical Review D, American Physical Society, 2015, 91 (11), pp.112013. 〈10.1103/PhysRevD.91.112013〉. 〈in2p3-01143445〉

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