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 (3) , 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 (4) , H. Abreu (4) , N. Andari (4) , C. Arnault (4) , E. Augé (4) , P. Barrillon (4) , M. Benoit (4) , S. Binet (4) , C. Bourdarios (4) , C. Collard (5) , 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) , P. Matricon (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) , E. Scifo (4) , L. Serin (4) , S. Simion (4) , R. Tanaka (4) , M. Teinturier (4) , J.J. Veillet (4) , I. Vukotic (4) , F. Wicek (4) , D. Zerwas (4) , Zhiqing Zhang (4) , S. Albrand (6) , M.L. Andrieux (6) , Q. Buat (6) , B. Clement (6) , J. Collot (6) , S. Crépé-Renaudin (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)

1 LAPP - Laboratoire d'Annecy de Physique des Particules
2 CC-IN2P3 - Centre de Calcul de l'IN2P3
3 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
4 LAL - Laboratoire de l'Accélérateur Linéaire
5 IPHC - Institut Pluridisciplinaire Hubert Curien
6 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
7 CPPM - Centre de Physique des Particules de Marseille

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.

Domaines: Physique des Hautes Energies - Expérience [hep-ex]

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, 2012, 710, pp.383-402. ⟨10.1016/j.physletb.2012.03.005⟩. ⟨in2p3-00668406⟩