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Journal Articles Physical Review Letters Year : 2014

Search for Invisible Decays of a Higgs Boson Produced in Association with a Z Boson in ATLAS

G. Aad , S. Albrand (1) , J. Brown (1) , Q. Buat (1) , B. Clement (1) , J. Collot (1) , S. Crépé-Renaudin (1) , B. Dechenaux (1) , T. Delemontex (1) , P.A. Delsart (1) , C. Gabaldon (1) , M.H. Genest (1) , J.Y. Hostachy (1) , E. Laisne (1) , B.T. Le (1) , F. Ledroit-Guillon (1) , A. Lleres (1) , A. Lucotte (1) , F. Malek (1) , C. Monini (1) , J. Stark (1) , X. Sun (1) , B. Trocmé (1) , G. Rahal (2) , L. Alio (3) , M. Barbero (3) , C. Bertella (3) , N. Bousson (3) , J. C. Clémens (3) , Y. Coadou (3) , F. Djama (3) , F. Etienne (3) , L. Feligioni (3) , D. Hoffmann (3) , F. Hubaut (3) , E. B. F. G. Knoops (3) , E. Le Guirriec (3) , B. Li (3) , J. Maurer (3) , E. Monnier (3) , Y. Nagai (3) , J. Odier (3) , P. Pralavorio (3) , A. Rozanov (3) , T. Serre (3) , M. Talby (3) , N. Tannoury (3) , E. Tiouchichine (3) , S. Tisserant (3) , J. Toth (3) , F. Touchard (3) , M. Ughetto (3) , L. Vacavant (3) , D. Boumediene (4) , Emmanuel Busato (4) , D. Calvet (4) , S. Calvet (4) , J. Donini (4) , E. Dubreuil (4) , N. Ghodbane (4) , Ph. Gris (4) , C. Guicheney (4) , H. Liao (4) , D. Pallin (4) , Daniela Paredes Hernández (4) , F. Podlyski (4) , C. Santoni (4) , Timothée Theveneaux-Pelzer (4) , Loïc Valery (4) , F. Vazeille (4) , N. Berger (5) , M. Delmastro (5) , L. Di Ciaccio (5) , T.K.O. Doan (5) , S. Elles (5) , C. Goy (5) , T. Hryn'Ova (5) , S. Jézéquel (5) , H. Keoshkerian (5) , R. Lafaye (5) , J. Leveque (5) , V.P. Lombardo (5) , N. Massol (5) , H. Przysiezniak (5) , G. Sauvage (5) , E. Sauvan (5) , M. Schwoerer (5) , T. Todorov (5) , I. Wingerter-Seez (5) , R. Zitoun (5) , S. Abdel Khalek (6) , E. Augé (6) , A. Bassalat (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) , T. Guillemin (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) , L. Poggioli (6) , P. Puzo (6) , A. Renaud (6) , D. Rousseau (6) , G. Rybkin (6) , J.B. Sauvan (7) , J. Schaarschmidt (6) , A.C. Schaffer (6) , E. Scifo (6) , L. Serin (6) , S. Simion (6) , R. Tanaka (6) , H.L. Tran (6) , D. Zerwas (6) , Zhiqing Zhang (6) , I. Koletsou (5) , O. Simard (5)
G. Aad
Y. Coadou
S. Calvet
N. Berger
C. Goy
T. Hryn'Ova
E. Augé
D. Rousseau
Zhiqing Zhang
  • Function : Author
  • PersonId : 829631

Abstract

A search for evidence of invisible-particle decay modes of a Higgs boson produced in association with a Z boson at the Large Hadron Collider is presented. No deviation from the Standard Model expectation is observed in 4.5 fb-1 (20.3 fb-1) of 7 (8) TeV pp collision data collected by the ATLAS experiment. Assuming the Standard Model rate for ZH production, an upper limit of 75%, at the 95% confidence level is set on the branching ratio to invisible-particle decay modes of the Higgs boson at a mass of 125.5 GeV. The limit on the branching ratio is also interpreted in terms of an upper limit on the allowed dark matter--nucleon scattering cross section within a Higgs-portal dark matter scenario. Limits are also set on an additional neutral Higgs boson, in the mass range 110

Dates and versions

in2p3-00946708 , version 1 (14-02-2014)

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Cite

G. Aad, S. Albrand, J. Brown, Q. Buat, B. Clement, et al.. Search for Invisible Decays of a Higgs Boson Produced in Association with a Z Boson in ATLAS. Physical Review Letters, 2014, 112, pp.201802. ⟨10.1103/PhysRevLett.112.201802⟩. ⟨in2p3-00946708⟩
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