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Search for the Standard Model Higgs boson in the decay channel H->ZZ(*)->4l with 4.8 fb-1 of pp collisions at sqrt(s)=7 TeV with ATLAS

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 L. Helary 1 T. Hryn'Ova 1 A. Jérémie 1 S. Jézéquel 1 M. Kataoka 1 J. Labbe 1 R. Lafaye 1 J. Leveque 1 V.P. Lombardo 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 Y. Zolnierowski 1 C. Biscarat 2 E. Cogneras 2 G. Rahal 2 D. Boumediene 3 Emmanuel Busato 3 D. Calvet 3 S. Calvet 3 Reina Coromoto Camacho Toro 3 Diane Cinca 4 J. Donini 3 R. Febbraro 3 N. Ghodbane 3 C. Guicheney 3 H. Liao 3 D. Pallin 3 F. Podlyski 3 C. Santoni 3 L. P. Says 3 F. Vazeille 3 S. Abdel Khalek 5 H. Abreu 5 N. Andari 5 C. Arnault 5 E. Augé 5 P. Barrillon 5 M. Benoit 5 S. Binet 5 C. Bourdarios 5 C. Collard 6 C. de la Taille 5 J.B. de Vivie de Regie 5 L. Duflot 5 M. Escalier 5 L. Fayard 5 D. Fournier 5 J.-F. Grivaz 5 S. Henrot-Versillé 5 J. Hrivnac 5 L. Iconomidou-Fayard 5 J. Idarraga 5 M. Kado 5 N. Lorenzo Martinez 5 A. Lounis 5 N. Makovec 5 P. Matricon 5 F. Niedercorn 5 L. Poggioli 5 P. Puzo 5 A. Renaud 5 D. Rousseau 5 G. Rybkin 5 J.B. Sauvan 5 J. Schaarschmidt 5 A.C. Schaffer 5 E. Scifo 5 L. Serin 5 S. Simion 5 R. Tanaka 5 M. Teinturier 5 J.J. Veillet 5 I. Vukotic 5 F. Wicek 5 D. Zerwas 5 Zhiqing Zhang 5 S. Albrand 7 M.L. Andrieux 7 Q. Buat 7 B. Clement 7 J. Collot 7 S. Crépé-Renaudin 7 T. Delemontex 7 P.A. Delsart 7 M.H. Genest 7 J.Y. Hostachy 7 E. Laisne 7 F. Ledroit-Guillon 7 A. Lleres 7 A. Lucotte 7 F. Malek 7 P. Martin 7 F. Polci 7 J. Stark 7 X. Sun 7 B. Trocmé 7 J. Wang 7 C. Weydert 7 S. Aoun 8 C. P. Bee 8 C. Benchouk 8 C. Bertella 8 N. Bousson 8 J. C. Clémens 8 Y. Coadou 8 F. Djama 8 F. Etienne 8 L. Feligioni 8 F. Henry-Couannier 8 D. Hoffmann 8 F. Hubaut 8 E. B. F. G. Knoops 8 E. Le Guirriec 8 B. Li 8 J. Maurer 8 E. Monnier 8 J. Odier 8 P. Pralavorio 8 Z. Qian 8 A. Rozanov 8 M. Talby 8 N. Tannoury 8 S. Tisserant 8 J. Toth 8 F. Touchard 8 L. Vacavant 8
Abstract : This Letter presents a search for the Standard Model Higgs boson in the decay channel H->ZZ(*)->l+l-l'+l'-, where l,l'=e or mu, using proton-proton collisions at sqrt(s)=7 TeV recorded with the ATLAS detector and corresponding to an integrated luminosity of 4.8 fb^-1. The four-lepton mass distribution is compared with Standard Model background expectations to derive upper limits on the cross section of a Standard Model Higgs boson with a mass between 110 GeV and 600 GeV which exclude the mass ranges 134-156 GeV, 182-233 GeV, 256-265 GeV and 266-415 GeV at the 95% confidence level. The largest upward deviations from the background-only hypothesis are observed for Higgs boson masses of 125, 244 and 500 GeV with local significances of 2.1, 2.2 and 2.1 standard deviations, respectively. Once the look-elsewhere effect is considered, none of these excesses are significant.
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Submitted on : Thursday, February 9, 2012 - 5:05:08 PM
Last modification on : Wednesday, September 16, 2020 - 4:24:26 PM

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G. Aad, L. Aperio Bella, B. Aubert, N. Berger, J. Colas, et al.. Search for the Standard Model Higgs boson in the decay channel H->ZZ(*)->4l with 4.8 fb-1 of pp collisions at sqrt(s)=7 TeV with ATLAS. Physics Letters B, Elsevier, 2012, 710, pp.383-402. ⟨10.1016/j.physletb.2012.03.005⟩. ⟨in2p3-00668406⟩

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