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Search for W′→tb¯ in the lepton plus jets final state in proton-proton collisions at a centre-of-mass energy of √s = 8 TeV with the ATLAS detector

G. Aad 1 S. Albrand 2 J. Brown 2 J. Collot 2 S. Crépé-Renaudin 2 B. Dechenaux 2 P.A. Delsart 2 C. Gabaldon 2 M.H. Genest 2 J.Y. Hostachy 2 F. Ledroit-Guillon 2 A. Lleres 2 A. Lucotte 2 F. Malek 2 C. Monini 2 J. Stark 2 B. Trocmé 2 M. Wu 2 G. Rahal 3 Z. Barnovska 4 N. Berger 4 M. Delmastro 4 L. Di Ciaccio T.K.O. Doan 4 S. Elles 4 C. Goy 4 T. Hryn’ova S. Jézéquel 4 H. Keoshkerian 4 I. Koletsou 4 R. Lafaye 4 J. Leveque V.P. Lombardo 4 N. Massol 4 H. Przysiezniak 4 G. Sauvage 4 E. Sauvan 4 M. Schwoerer 4 O. Simard 4 T. Todorov 4 I. Wingerter-Seez 4 S. Abdel Khalek 5 A. Bassalat 5 C. Becot 5 S. Binet 5 C. Bourdarios 5 D. Charfeddine 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 F. Hariri 5 S. Henrot-Versillé 5 J. Hrivnac 5 L. Iconomidou-Fayard 5 M. Kado 5 A. Lounis 5 N. Makovec 5 L. Poggioli 5 P. Puzo 5 A. Renaud 5 D. Rousseau 5 G. Rybkin 5 A.C. Schaffer 5 E. Scifo 5 L. Serin 5 S. Simion 5 R. Tanaka 5 H.L. Tran 5 D. Zerwas 5 Z. Zhang 5 L. Alio 1 M. Barbero 1 J. C. Clémens 1 Y. Coadou 1 Sara Diglio 1 F. Djama 1 L. Feligioni 1 G.D. Hallewell 1 D. Hoffmann 1 F. Hubaut 1 E. B. F. G. Knoops 1 E. Le Guirriec 1 B. Li D. Madaffari 1 K. Mochizuki 1 E. Monnier 1 S. Muanza 1 Y. Nagai 1 P. Pralavorio 1 A. Rozanov 1 T. Serre 1 M. Talby 1 E. Tiouchichine 1 S. Tisserant 1 J. Toth 1 F. Touchard 1 M. Ughetto 1 L. Vacavant 1
1 CPPM - Centre de Physique des Particules de Marseille
2 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
3 CC-IN2P3 - Centre de Calcul de l'IN2P3
4 LAPP - Laboratoire d'Annecy de Physique des Particules
5 LAL - Laboratoire de l'Accélérateur Linéaire
Abstract : A search for new charged massive gauge bosons, called W′, is performed with the ATLAS detector at the LHC, in proton-proton collisions at a centre-of-mass energy of s√ = 8 TeV, using a dataset corresponding to an integrated luminosity of 20.3 fb−1. This analysis searches for W′ bosons in the W′→tb¯ decay channel in final states with electrons or muons, using a multivariate method based on boosted decision trees. The search covers masses between 0.5 and 3.0 TeV, for right-handed or left-handed W′ bosons. No significant deviation from the Standard Model expectation is observed and limits are set on the W′→tb¯ cross-section times branching ratio and on the W′-boson effective couplings as a function of the W′-boson mass using the CLs procedure. For a left-handed (right-handed) W′ boson, masses below 1.70 (1.92) TeV are excluded at 95%
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Submitted on : Monday, October 20, 2014 - 9:50:34 AM
Last modification on : Tuesday, October 19, 2021 - 10:50:43 PM

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IN2P3 | UNIV-AMU | LPSC | UNIV-SAVOIE | CPPM | LAPP | CNRS | LAL | GEPI | UGA | CC-IN2P3

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G. Aad, S. Albrand, J. Brown, J. Collot, S. Crépé-Renaudin, et al.. Search for W′→tb¯ in the lepton plus jets final state in proton-proton collisions at a centre-of-mass energy of √s = 8 TeV with the ATLAS detector. Physics Letters B, Elsevier, 2015, 743, pp.235-255. ⟨10.1016/j.physletb.2015.02.051⟩. ⟨in2p3-01075729⟩

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