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Combined search for the Standard Model Higgs boson using up to 4.9 fb-1 of pp collision data at sqrt(s) = 7 TeV with the ATLAS detector at the LHC

G. Aad C. Biscarat 1 E. Cogneras 1 G. Rahal 1 H. Abreu 2 N. Andari 2 C. Arnault 2 E. Augé 2 P. Barrillon 2 M. Benoit 2 S. Binet 2 J.-B. Blanchard 2 C. Bourdarios 2 D. Breton 2 C. Collard 2 C. de la Taille 2 J.B. de Vivie de Regie 2 S. Diglio 2 L. Duflot 2 M. Escalier 2 A.C. Falou 2 L. Fayard 2 D. Fournier 2 J.-F. Grivaz 2 M. Heller 2 S. Henrot-Versillé 2 J. Hrivnac 2 L. Iconomidou-Fayard 2 J. Idarraga 2 M. Kado 2 A. Lounis 2 N. Makovec 2 P. Matricon 2 F. Niedercorn 2 L. Poggioli 2 P. Puzo 2 A. Renaud 2 D. Rousseau 2 X. Ruan 2 G. Rybkin 2 J.B. Sauvan 2 J. Schaarschmidt 2 A.C. Schaffer 2 L. Serin 2 S. Simion 2 R. Tanaka 2 J.J. Veillet 2 I. Vukotic 2 F. Wicek 2 D. Zerwas 2 Zhiqing Zhang 2 L. Aperio Bella 3 B. Aubert 3 N. Berger 3 J. Colas 3 M. Delmastro 3 L. Di Ciaccio 3 T.K.O. Doan 3 S. Elles 3 C. Goy 3 L. Helary 3 T. Hryn'Ova 3 A. Jérémie 3 S. Jézéquel 3 M. Kataoka 3 J. Labbe 3 R. Lafaye 3 J. Leveque 3 V.P. Lombardo 3 N. Massol 3 P. Perrodo 3 E. Petit 3 H. Przysiezniak 3 E. Richter-Was 3 G. Sauvage 3 E. Sauvan 3 M. Schwoerer 3 T. Todorov 3 D. Tsionou 3 I. Wingerter-Seez 3 R. Zitoun 3 Y. Zolnierowski 3 D. Boumediene 4 Emmanuel Busato 4 D. Calvet 4 S. Calvet 4 Reina Coromoto Camacho Toro 4 Diane Cinca 5 J. Donini 6 R. Febbraro 4 N. Ghodbane 4 C. Guicheney 4 H. Liao 4 D. Pallin 4 F. Podlyski 4 C. Santoni 4 L. P. Says 4 F. Vazeille 4 S. Albrand 6 M.L. Andrieux 6 Q. Buat 6 B. Clement 6 J. Collot 6 S. Crépé-Renaudin 6 B. Dechenaux 6 T. Delemontex 6 P.A. Delsart 6 M.H. Genest 6 J.Y. Hostachy 6 E. Laisne 6 F. Ledroit-Guillon 6 A. Lleres 6 A. Lucotte 6 F. Malek 6 P. Martin 6 F. Polci 6 J. Stark 6 X. Sun 6 B. Trocmé 6 J. Wang 6 C. Weydert 6 S. Aoun 7 C. P. Bee 7 C. Bertella 7 N. Bousson 7 J. C. Clémens 7 Y. Coadou 7 F. Djama 7 F. Etienne 7 L. Feligioni 7 F. Henry-Couannier 7 D. Hoffmann 7 F. Hubaut 7 E. B. F. G. Knoops 7 E. Le Guirriec 7 B. Li 7 J. Maurer 7 E. Monnier 7 J. Odier 7 P. Pralavorio 7 Z. Qian 7 A. Rozanov 7 M. Talby 7 N. Tannoury 7 S. Tisserant 7 J. Toth 7 F. Touchard 7 L. Vacavant 7
Abstract : A combined search for the Standard Model Higgs boson with the ATLAS experiment at the LHC using datasets corresponding to integrated luminosities from 1.04 fb-1 to 4.9 fb-1 of pp collisions collected at sqrt(s) = 7 TeV is presented. The Higgs boson mass ranges 112.9-115.5 GeV, 131-238 GeV and 251-466 GeV are excluded at the 95% confidence level (CL), while the range 124-519 GeV is expected to be excluded in the absence of a signal. An excess of events is observed around mH ~ 126 GeV with a local significance of 3.5 standard deviations (sigma). The local significance of H -> gamma gamma, H -> ZZ(*) -> lll'l' and H -> WW(*) -> lvl'v, the three most sensitive channels in this mass range, are 2.8 sigma, 2.1 sigma and 1.4 sigma, respectively. The global probability for the background to produce such a fluctuation anywhere in the explored Higgs boson mass range 110-600 GeV is estimated to be ~1.4% or, equivalently 2.2 sigma.
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http://hal.in2p3.fr/in2p3-00668181
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Submitted on : Thursday, February 9, 2012 - 11:52:25 AM
Last modification on : Thursday, November 26, 2020 - 3:39:06 PM

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G. Aad, C. Biscarat, E. Cogneras, G. Rahal, H. Abreu, et al.. Combined search for the Standard Model Higgs boson using up to 4.9 fb-1 of pp collision data at sqrt(s) = 7 TeV with the ATLAS detector at the LHC. Physics Letters B, Elsevier, 2012, 710, pp.49-66. ⟨10.1016/j.physletb.2012.02.044⟩. ⟨in2p3-00668181⟩

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