Measurement of the $t\bar{t}Z$ and $t\bar{t}W$ production cross sections in multilepton final states using 3.2 fb$^{-1}$ of $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector

M. Aaboud Z. Barnovska-Blenessy 1 N. Berger 1 M. Delmastro 1 L. Di Ciaccio 1 S. Elles 1 K. Grevtsov 1 T. Guillemin 1 T. Hryn’ova 1 S. Jézéquel 1 I. Koletsou 1 R. Lafaye 1 J. Levêque 1 P. Mastrandea 1 G. Sauvage 1 E. Sauvan 1 O. Simard 1 B.H. Smart 1 T. Todorov 1 I. Wingerter-Seez 1 E. Yatsenko 1 M.K. Ayoub 2 A. Bassalat 2 S. Binet C. Becot 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 F. Hariri 2 S. Henrot-Versille 2 J. Hrivnac 2 L. Iconomidou-Fayard 2 M. Kado 2 A. Lounis 2 N. Makovec 2 N. Morange 2 C. Nellist 2 P. Petroff 2 L. Poggioli 2 P. Puzo 2 A. Renaud 2 G. Rybkin 2 D. Rousseau 2 A.C. Schaffer 2 L. Serin 2 E. Scifo 2 S. Simion 2 R. Tanaka 2 D. Zerwas 2 Zhongkai Zhang 2 Y. Zhao 2 G. Rahal 3 S. Albrand 4 S. Berlendis 4 C. Camincher 4 J. Collot 4 S. Crépé-Renaudin 4 P.A. Delsart 4 C. Gabaldon 4 M.H. Genest 4 P.O.J. Gradin 4 J.Y. Hostachy 4 F. Ledroit-Guillon 4 A. Lleres 4 A. Lucotte 4 F. Malek 4 E. Petit 4 J. Stark 4 B. Trocmé 4 M. Wu 4 G. Aad 5 M. Alstaty 5 M. Barbero 5 A. Calandri 5 T.P. Calvet 5 Y. Coadou 5 C. Diaconu 5 S. Diglio 5 F. Djama 5 V. Ellajosyula 5 L. Feligioni 5 A. Hadef 5 G.D. Hallewell 5 F. Hubaut 5 S.J. Kahn 5 E. B. F. G. Knoops 5 E. Le Guirriec 5 J. Liu 5 K. Liu 5 D. Madaffari 5 E. Monnier 5 S. Muanza 5 E. Nagy 5 P. Pralavorio 5 Y. Rodina 5 A. Rozanov 5 M. Talby 5 T. Theveneaux-Pelzer 5 R.E. Ticse Torres 5 S. Tisserant 5 J. Toth 5 F. Touchard 5 L. Vacavant 5 C. Wang 5 D. Boumediene 6 E. Busato 6 D. Calvet 6 S. Calvet 6 A.R. Chomont 6 J. Donini 6 Ph. Gris 6 R. Madar 6 D. Pallin 6 S.M. Romano Saez 6 C. Santoni 6 D. Simon 6 F. Vazeille 6
Abstract : A measurement of the $t\bar{t}Z$ and $t\bar{t}W$ production cross sections in final states with either two same-charge muons, or three or four leptons (electrons or muons) is presented. The analysis uses a data sample of proton-proton collisions at $\sqrt{s} = 13$ TeV recorded with the ATLAS detector at the Large Hadron Collider in 2015, corresponding to a total integrated luminosity of 3.2 fb$^{-1}$. The inclusive cross sections are extracted using likelihood fits to signal and control regions, resulting in $\sigma_{t\bar{t}Z} = 0.9 \pm 0.3$ pb and $\sigma_{t\bar{t}W} = 1.5 \pm 0.8$ pb, in agreement with the Standard Model predictions.
Type de document :
Article dans une revue
European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2017, 77, pp.40. 〈10.1140/epjc/s10052-016-4574-y〉
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Soumis le : mercredi 7 septembre 2016 - 15:40:17
Dernière modification le : mardi 5 juin 2018 - 16:40:03

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M. Aaboud, Z. Barnovska-Blenessy, N. Berger, M. Delmastro, L. Di Ciaccio, et al.. Measurement of the $t\bar{t}Z$ and $t\bar{t}W$ production cross sections in multilepton final states using 3.2 fb$^{-1}$ of $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2017, 77, pp.40. 〈10.1140/epjc/s10052-016-4574-y〉. 〈in2p3-01361813〉

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