Search for a Standard Model Higgs boson in the mass range 200-600 GeV in the H->ZZ->llqq decay channel

G. Aad , S. Albrand (1) , Q. Buat (1) , B. Clement (1) , J. Collot (1) , S. Crépé-Renaudin (1) , B. Dechenaux (1) , T. Delemontex (1) , P.A. Delsart (1) , M.H. Genest (1) , J.Y. Hostachy (1) , E. Laisne (1) , F. Ledroit-Guillon (1) , A. Lleres (1) , A. Lucotte (1) , F. Malek (1) , J. Stark (1) , X. Sun (1) , B. Trocmé (1) , J. Wang (1) , C. Weydert (1) , C. Biscarat (2) , E. Cogneras (2) , G. Rahal (2) , F. Vannucci (3) , D. Boumediene (4) , Emmanuel Busato (4) , D. Calvet (4) , S. Calvet (4) , Reina Coromoto Camacho Toro (4) , Diane Cinca (4) , J. Donini (4) , R. Febbraro (4) , N. Ghodbane (4) , C. Guicheney (4) , H. Liao (4) , D. Pallin (4) , Daniela Paredes Hernández (4) , F. Podlyski (4) , C. Santoni (4) , F. Vazeille (4) , L. Aperio Bella (5) , B. Aubert (5) , N. Berger (5) , J. Colas (5) , M. Delmastro (5) , L. Di Ciaccio (5) , T.K.O. Doan (5) , S. Elles (5) , C. Goy (5) , T. Hryn'Ova (5) , A. Jérémie (5) , S. Jézéquel (5) , M. Kataoka (5) , J. Labbe (5) , R. Lafaye (5) , J. Leveque (5) , V.P. Lombardo (5) , N. Massol (5) , P. Perrodo (5) , E. Petit (5) , H. Przysiezniak (5) , E. Richter-Was (5) , G. Sauvage (5) , E. Sauvan (5) , M. Schwoerer (5) , T. Todorov (5) , D. Tsionou (5) , I. Wingerter-Seez (5) , R. Zitoun (5) , S. Abdel Khalek (6) , H. Abreu (6) , N. Andari (6) , C. Arnault (6) , E. Augé (6) , P. Barrillon (6) , M. Benoit (6) , S. Binet (6) , C. Bourdarios (6) , C. de La Taille (6) , J.B. de Vivie de Regie (6) , L. Duflot (6) , M. Escalier (6) , L. Fayard (6) , D. Fournier (6) , J.-F. Grivaz (6) , S. Henrot-Versillé (6) , J. Hrivnac (6) , L. Iconomidou-Fayard (6) , J. Idarraga (6) , M. Kado (6) , N. Lorenzo Martinez (6) , A. Lounis (6) , N. Makovec (6) , P. Matricon (6) , F. Niedercorn (6) , L. Poggioli (6) , P. Puzo (6) , A. Renaud (6) , D. Rousseau (6) , G. Rybkin (6) , J.B. Sauvan (6) , J. Schaarschmidt (6) , A.C. Schaffer (6) , E. Scifo (6) , L. Serin (6) , S. Simion (6) , R. Tanaka (6) , M. Teinturier (6) , J.J. Veillet (6) , I. Vukotic (6) , F. Wicek (6) , D. Zerwas (6) , Zhiqing Zhang (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) , 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) , A. Rozanov (7) , M. Talby (7) , N. Tannoury (7) , S. Tisserant (7) , J. Toth (7) , F. Touchard (7) , L. Vacavant (7)

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

A search for a heavy Standard Model Higgs boson decaying via H->ZZ->llqq, where l=e or mu, is presented. The search uses a data set of pp collisions at sqrt(s) = 7 TeV, corresponding to an integrated luminosity of 4.7 fb^-1 collected in 2011 by the ATLAS detector at the CERN LHC. No significant excess of events above the estimated background is found. Upper limits at 95% confidence level on the production cross section of a Higgs boson with a mass in the range between 200 and 600 GeV are derived. A Standard Model Higgs boson with a mass in the range 300 <= mH <= 322 GeV or 353 <= mH <= 410 GeV is excluded at 95% CL. The corresponding expected exclusion range is 351 <= mH <= 404 GeV at 95% CL.

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

G. Aad, S. Albrand, Q. Buat, B. Clement, J. Collot, et al.. Search for a Standard Model Higgs boson in the mass range 200-600 GeV in the H->ZZ->llqq decay channel. Physics Letters B, 2012, 717, pp.70-88. ⟨10.1016/j.physletb.2012.09.020⟩. ⟨in2p3-00707586⟩