Search for resonances in diphoton events at $\sqrt{s}$=13 TeV with the ATLAS detector - Université Clermont Auvergne Accéder directement au contenu
Article Dans Une Revue Journal of High Energy Physics Année : 2016

Search for resonances in diphoton events at $\sqrt{s}$=13 TeV with the ATLAS detector

M. Aaboud , Z. Barnovska (1) , N. Berger (1) , M. Delmastro (1) , L. Di Ciaccio (1) , S. Elles (1) , K. Grevtsov (1) , T. Hryn’ova (1) , S. Jézéquel (1) , I. Koletsou (1) , R. Lafaye (1) , Jérémy Lévêque (1) , P. Mastrandea (1) , G. Sauvage (1) , E. Sauvan (1) , O. Simard (1) , T. Todorov (1) , I. Wingerter-Seez (1) , E. Yatsenko (1) , G. Aad (2) , M. Alstaty (2) , M. Barbero (2) , A. Calandri (2) , T.P. Calvet (2) , Y. Coadou (2) , C. Diaconu (2) , Sara Diglio (2) , F. Djama (2) , V. Ellajosyula (2) , L. Feligioni (2) , A. Hadef (2) , G.D. Hallewell (2) , F. Hubaut (2) , S.J. Kahn (2) , E. B. F. G. Knoops (2) , E. Le Guirriec (2) , J. Liu (2) , K. Liu (2) , D. Madaffari (2) , E. Monnier (2) , S. Muanza (2) , E. Nagy (2) , P. Pralavorio (2) , Y. Rodina (2) , A. Rozanov (2) , M. Talby (2) , T. Theveneaux-Pelzer (2) , R.E. Ticse Torres (2) , S. Tisserant (2) , J. Toth (2) , F. Touchard (2) , L. Vacavant (2) , Chen Wang (2) , D. Boumediene (3) , E. Busato (3) , D. Calvet (3) , S. Calvet (3) , A.R. Chomont (3) , J. Donini (3) , Ph. Gris (3) , R. Madar (3) , D. Pallin (3) , S.M. Romano Saez (3) , C. Santoni (3) , D. Simon (3) , F. Vazeille (3) , M.K. Ayoub (4) , A. Bassalat (4) , S. Binet (4) , C. Becot , C. Bourdarios (4) , J.B. de Vivie De Regie (4) , D. Delgove (4) , L. Duflot (4) , M. Escalier (4) , L. Fayard (4) , D. Fournier (4) , E.L. Gkougkousis (4) , J.-F. Grivaz (4) , T. Guillemin (4) , F. Hariri (4) , S. Henrot-Versille (4) , J. Hrivnac (4) , L. Iconomidou-Fayard (4) , M. Kado (4) , A. Lounis (4) , N. Makovec (4) , N. Morange (4) , C. Nellist (4) , P. Petroff (4) , L. Poggioli (4) , P. Puzo (4) , A. Renaud (4) , G. Rybkin (4) , D. Rousseau (4) , A.C. Schaffer (4) , L. Serin (4) , E. Scifo (4) , S. Simion (4) , R. Tanaka (4) , D. Zerwas (4) , Zhongkai Zhang (4) , Y. Zhao (4) , G. Rahal (5) , S. Albrand (6) , S. Berlendis (6) , C. Camincher (6) , J. Collot (6) , S. Crépé-Renaudin (6) , P.A. Delsart (6) , C. Gabaldon (6) , M.H. Genest (6) , P.O.J. Gradin (6) , J.Y. Hostachy (6) , F. Ledroit-Guillon (6) , A. Lleres (6) , A. Lucotte (6) , F. Malek (6) , T. Meideck , E. Petit (6) , J. Stark (6) , B. Trocmé (6) , M. Wu (6)
M. Aaboud
  • Fonction : Auteur
N. Berger
T. Hryn’ova
G. Aad
Y. Coadou
Chen Wang
  • Fonction : Auteur
  • PersonId : 829307
S. Calvet
C. Becot
  • Fonction : Auteur
D. Rousseau
T. Meideck
  • Fonction : Auteur

Résumé

Searches for new resonances decaying into two photons in the ATLAS experiment at the CERN Large Hadron Collider are described. The analysis is based on proton--proton collision data corresponding to an integrated luminosity of 3.2 fb$^{-1}$ at $\sqrt{s} = 13$ TeV recorded in 2015. Two searches are performed, one targeted at a spin-2 particle of mass larger than 500 GeV, using Randall--Sundrum graviton states as a benchmark model, and one optimized for a spin-0 particle of mass larger than 200 GeV. Varying both the mass and the decay width, the most significant deviation from the background-only hypothesis is observed at a diphoton invariant mass around 750 GeV with local significances of 3.8 and 3.9 standard deviations in the searches optimized for a spin-2 and spin-0 particle, respectively. The global significances are estimated to be 2.1 standard deviations for both analyses. The consistency between the data collected at 13 TeV and 8 TeV is also evaluated. Limits on the production cross section times branching ratio to two photons for the two resonance types are reported.

Dates et versions

in2p3-01331581 , version 1 (14-06-2016)

Identifiants

Citer

M. Aaboud, Z. Barnovska, N. Berger, M. Delmastro, L. Di Ciaccio, et al.. Search for resonances in diphoton events at $\sqrt{s}$=13 TeV with the ATLAS detector. Journal of High Energy Physics, 2016, 09, pp.001. ⟨10.1007/JHEP09(2016)001⟩. ⟨in2p3-01331581⟩
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