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Search for a light charged Higgs boson in the decay channel $H^+ \to c\bar{s}$ in $t\bar{t}$ events using pp collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector

G. Aad L. Aperio Bella 1 B. Aubert 1 N. Berger 1 J. Colas 1 M. Delmastro 1 L. Di Ciaccio 1 T.K.O. Doan 1 S. Elles 1 C. Goy 1 T. Hryn'Ova 1 S. Jézéquel 1 H. Keoshkerian 1 R. Lafaye 1 J. Leveque 1 V.P. Lombardo 1 M. Maeno 1 N. Massol 1 P. Perrodo 1 E. Petit 1 H. Przysiezniak 1 E. Richter-Was 1 G. Sauvage 1 E. Sauvan 1 M. Schwoerer 1 T. Todorov 1 D. Tsionou 1 I. Wingerter-Seez 1 R. Zitoun 1 C. Biscarat 2 G. Rahal 2 D. Boumediene 3 Emmanuel Busato 3 D. Calvet 3 S. Calvet 3 Reina Coromoto Camacho Toro 3 Diane Cinca 3 J. Donini 3 E. Dubreuil 3 Ph. Gris 3 N. Ghodbane 3 C. Guicheney 3 H. Liao 3 D. Pallin 3 Daniela Paredes Hernández 3 F. Podlyski 3 C. Santoni 3 Loïc Valery 3 F. Vazeille 3 S. Abdel Khalek 4 N. Andari 4 E. Augé 4 M. Benoit 4 S. Binet 4 C. Bourdarios 4 C. de la Taille 4 J.B. de Vivie de Regie 4 L. Duflot 4 M. Escalier 4 L. Fayard 4 D. Fournier 4 J.-F. Grivaz 4 S. Henrot-Versillé 4 J. Hrivnac 4 L. Iconomidou-Fayard 4 J. Idarraga 4 M. Kado 4 N. Lorenzo Martinez 4 A. Lounis 4 N. Makovec 4 F. Niedercorn 4 L. Poggioli 4 P. Puzo 4 A. Renaud 4 D. Rousseau 4 G. Rybkin 4 J.B. Sauvan 4 J. Schaarschmidt 4 A.C. Schaffer 4 L. Serin 4 S. Simion 4 R. Tanaka 4 M. Teinturier 4 J.J. Veillet 4 D. Zerwas 4 Zhiqing Zhang 4 S. Albrand 5 M.L. Andrieux 5 Q. Buat 5 B. Clement 5 J. Collot 5 S. Crépé-Renaudin 5 B. Dechenaux 5 T. Delemontex 5 P.A. Delsart 5 M.H. Genest 5 J.Y. Hostachy 5 E. Laisne 5 F. Ledroit-Guillon 5 A. Lleres 5 A. Lucotte 5 F. Malek 5 J. Stark 5 X. Sun 5 B. Trocmé 5 C. Weydert 5 S. Aoun 6 C. P. Bee 6 C. Bertella 6 N. Bousson 6 J. C. Clémens 6 Y. Coadou 6 F. Djama 6 F. Etienne 6 L. Feligioni 6 D. Hoffmann 6 F. Hubaut 6 E. B. F. G. Knoops 6 E. Le Guirriec 6 B. Li 6 J. Maurer 6 E. Monnier 6 J. Odier 6 P. Pralavorio 6 A. Rozanov 6 M. Talby 6 N. Tannoury 6 E. Tiouchichine 6 S. Tisserant 6 J. Toth 6 F. Touchard 6 M. Ughetto 6 L. Vacavant 6
Abstract : A search for a charged Higgs boson (H+) in ttbar decays is presented, where one of the top quarks decays via t->H+b, followed by H+->two jets (csbar). The other top quark decays to Wb, where the W boson then decays into a lepton (e/mu) and a neutrino. The data were recorded in pp collisions at sqrt(s) = 7TeV by the ATLAS detector at the LHC in 2011, and correspond to an integrated luminosity of 4.7 fb-1. With no observation of a signal, 95% confidence level (CL) upper limits are set on the decay branching ratio of top quarks to charged Higgs bosons varying between 5% and 1% for H+ masses between 90 GeV and 150 GeV, assuming Br(H+->csbar)=100%.
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G. Aad, L. Aperio Bella, B. Aubert, N. Berger, J. Colas, et al.. Search for a light charged Higgs boson in the decay channel $H^+ \to c\bar{s}$ in $t\bar{t}$ events using pp collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2013, 73, pp.2465. ⟨10.1140/epjc/s10052-013-2465-z⟩. ⟨in2p3-00789723⟩

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