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Search for the Standard Model Higgs boson in the diphoton decay channel with 4.9 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 5 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 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. Benchouk 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 search for the Standard Model Higgs boson is performed in the diphoton decay channel. The data used corresponds to an integrated luminosity of 4.9 fb-1 collected with the ATLAS detector at the Large Hadron Collider in proton-proton collisions at a center-of-mass energy of sqrt(s) = 7 TeV. In the diphoton mass range 110-150 GeV, the largest excess with respect to the background-only hypothesis is observed at 126.5 GeV, with a local significance of 2.8 standard deviations. Taking the look-elsewhere effect into account in the range 110-150 GeV, this significance becomes 1.5 standard deviations. The Standard Model Higgs boson is excluded at 95% confidence level in the mass ranges of 113-115 GeV and 134.5-136 GeV.
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Submitted on : Thursday, February 9, 2012 - 5:01:22 PM
Last modification on : Thursday, November 26, 2020 - 3:39:06 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 diphoton decay channel with 4.9 fb-1 of pp collisions at sqrt(s)=7 TeV with ATLAS. Physical Review Letters, American Physical Society, 2012, 108, pp.111803. ⟨10.1103/PhysRevLett.108.111803⟩. ⟨in2p3-00668402⟩

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