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Journal Articles Physics Letters B Year : 2014

Search for Higgs boson decays to a photon and a Z boson in pp collisions at sqrt(s)=7 and 8 TeV with the ATLAS detector

G. Aad (1) , L. Alio (1) , M. Barbero (1) , C. Bertella (1) , J.C. Clémens (1) , Y. Coadou (1) , F. Djama (1) , L. Feligioni (1) , D. Hoffmann (1) , F. Hubaut (1) , E. B. F. G. Knoops (1) , E. Le Guirriec (1) , B. Li (1) , D. Madaffari (1) , K. Mochizuki (1) , E. Monnier (1) , Y. Nagai (1) , J. Odier (1) , P. Pralavorio (1) , A. Rozanov (1) , T. Serre (1) , M. Talby (1) , N. Tannoury (1) , E. Tiouchichine (1) , S. Tisserant (1) , J. Toth (1) , F. Touchard (1) , M. Ughetto (1) , L. Vacavant (1) , J. Donini (2) , E. Dubreuil (2) , N. Ghodbane (2) , Ph. Gris (2) , C. Guicheney (2) , H. Liao (2) , D. Pallin (2) , Daniela Paredes Hernández (2) , F. Podlyski (2) , C. Santoni (2) , Timothée Theveneaux-Pelzer (2) , Loïc Valery (2) , F. Vazeille (2) , T. Beau (3) , M. Bomben (3) , G. Calderini (3) , F. Crescioli (3) , O. Davignon (3) , S. de Cecco (3) , A. Demilly (3) , F. Derue (3) , M.W. Krasny (3) , D. Lacour (3) , B. Laforge (3) , S. Laplace (3) , O. Le Dortz (3) , G. Lefebvre (3) , B. Malaescu (3) , G. Marchiori (3) , I. Nikolic-Audit (3) , J. Ocariz (3) , S. Pires (4) , C. Rangel-Smith (3) , M. Ridel (3) , L. Roos (3) , S. Trincaz-Duvoid (3) , F. Vannucci (3) , D. Varouchas (4) , H. Abreu (4) , H. Bachaou (4) , F. Balli (4) , F. Bauer (4) , N. Besson (4) , J.-B. Blanchard (4) , N.M. Bolnet (4) , M. Boonekamp (4) , L. Chevalier (4) , M. Dano Hoffmann (4) , F. Deliot (4) , J. Ernwein (4) , A.I. Etienvre (5) , A. Formica , P.F. Giraud (4) , H.M.X. Grabas (2) , C. Guyot (4) , S. Hassani , W. Kozanecki (4) , E. Lancon (4) , J.F. Laporte (4) , C. Maiani (4) , P. Mal (4) , B. Mansoulie (4) , H. Martinez (2) , N. Meric (4) , J.-P. Meyer (4) , L. Mijovic (4) , R. Nicolaidou (4) , A. Ouraou (4) , E. Protopapadaki (4) , B. Resende (4) , C.R. Royon (4) , L.L. Schoffel (4) , Ph. Schune (4) , Ph. Schwemling (4) , J. Schwindling (4) , D. Tsionou (4) , N. Vranjes (4) , M. Xiao (4) , G. Rahal (5) , S. Albrand (6) , J. Brown (6) , B. Clement (6) , J. Collot (6) , S. Crépé-Renaudin (6) , B. Dechenaux (6) , P.A. Delsart (6) , C. Gabaldon (6) , M.H. Genest (6) , J.Y. Hostachy (6) , B.T. Le (6) , F. Ledroit-Guillon (6) , A. Lleres (6) , A. Lucotte (6) , F. Malek (6) , C. Monini (6) , J. Stark (6) , B. Trocmé (6) , Z. Barnovska (7) , N. Berger (7) , M. Delmastro (7) , L. Di Ciaccio (7) , T.K.O. Doan (7) , S. Elles (7) , C. Goy (7) , T. Hryn'Ova (7) , S. Jézéquel (7) , H. Keoshkerian (7) , R. Lafaye (7) , J. Leveque (7) , V.P. Lombardo (7) , N. Massol (7) , H. Przysiezniak (7) , G. Sauvage (7) , E. Sauvan (7) , M. Schwoerer (7) , T. Todorov (7) , I. Wingerter-Seez (7) , R. Zitoun (7) , S. Abdel Khalek (8) , E. Augé (8) , A. Bassalat (8) , S. Binet (8) , C. Bourdarios (8) , C. de La Taille (8) , J.B. de Vivie de Regie (8) , L. Duflot (8) , M. Escalier (8) , L. Fayard (8) , D. Fournier (8) , J.-F. Grivaz (8) , T. Guillemin (8) , S. Henrot-Versillé (8) , J. Hrivnac (8) , L. Iconomidou-Fayard (8) , J. Idarraga (8) , M. Kado (8) , N. Lorenzo Martinez (8) , A. Lounis (8) , N. Makovec (8) , L. Poggioli (8) , P. Puzo (8) , A. Renaud (8) , D. Rousseau (8) , G. Rybkin (8) , J.B. Sauvan (9) , J. Schaarschmidt (8) , A.C. Schaffer (8) , E. Scifo (8) , L. Serin (8) , S. Simion (8) , R. Tanaka (8) , H.L. Tran (8) , D. Zerwas (8) , Zhiqing Zhang (8) , I. Koletsou (7) , O. Simard (7)
G. Aad
Y. Coadou
A. Formica
  • Function : Author
S. Hassani
  • Function : Author
N. Berger
C. Goy
T. Hryn'Ova
E. Augé
D. Rousseau
Zhiqing Zhang
  • Function : Author
  • PersonId : 829631

Abstract

A search is reported for a neutral Higgs boson in the decay channel H->Z gamma, Z->l+l- (l=e, mu), using 4.5 fb-1 of pp collisions at sqrt(s) = 7 TeV and 20.3 fb-1 of pp collisions at sqrt(s) = 8 TeV, recorded by the ATLAS detector at the CERN Large Hadron Collider. The observed distribution of the invariant mass of the three final-state particles, m(llgamma), is consistent with the Standard Model hypothesis in the investigated mass range of 120-150 GeV. For a Higgs boson with a mass of 125.5 GeV, the observed upper limit at the 95% confidence level is 11 times the Standard Model expectation. Upper limits are set on the cross section times branching ratio of a neutral Higgs boson with mass in the range 120-150 GeV between 0.13 and 0.5 pb for sqrt(s)=8 TeV at 95% confidence level.

Dates and versions

in2p3-00946737 , version 1 (14-02-2014)

Identifiers

Cite

G. Aad, L. Alio, M. Barbero, C. Bertella, J.C. Clémens, et al.. Search for Higgs boson decays to a photon and a Z boson in pp collisions at sqrt(s)=7 and 8 TeV with the ATLAS detector. Physics Letters B, 2014, 732, pp.8-27. ⟨10.1016/j.physletb.2014.03.015⟩. ⟨in2p3-00946737⟩
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