Search for Higgs boson pair production in the $b\bar{b} b\bar{b}$ final state from $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector - Université Clermont Auvergne Accéder directement au contenu
Article Dans Une Revue European Physical Journal C: Particles and Fields Année : 2015

Search for Higgs boson pair production in the $b\bar{b} b\bar{b}$ final state from $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector

G. Aad (1) , M.K. Ayoub (2) , A. Bassalat (2) , C. Becot (2) , S. Binet (2) , C. Bourdarios (2) , J.B. de Vivie De Regie (2) , D. Delgove (2) , L. Duflot (2) , M. Escalier (2) , L. Fayard (2) , D. Fournier (2) , E.L. Gkougkousis (2) , J.-F. Grivaz (2) , T. Guillemin (2) , F. Hariri (2) , S. Henrot-Versillé (2) , J. Hrivnac (2) , L. Iconomidou-Fayard (2) , M. Kado (2) , A. Lounis (2) , N. Makovec (2) , N. Morange (2) , C. Nellist (2) , L. Poggioli (2) , P. Puzo (2) , A. Renaud (2) , D. Rousseau (2) , G. Rybkin (2) , A.C. Schaffer (2) , E. Scifo (2) , L. Serin (2) , S. Simion (2) , R. Tanaka (2) , H.L. Tran (2) , D. Zerwas (2) , Zhongkai Zhang (2) , Y. Zhao (2) , G. Rahal (3) , Z. Barnovska (4) , N. Berger (4) , M. Delmastro (4) , L. Di Ciaccio (4) , S. Elles (4) , T. Hryn’ova (4) , S. Jézéquel (4) , I. Koletsou (4) , R. Lafaye (4) , J. Leveque (4) , N. Massol (4) , G. Sauvage (4) , E. Sauvan (4) , M. Schwoerer (4) , O. Simard (4) , T. Todorov (4) , I. Wingerter-Seez (4) , E. Yatsenko (4) , D. Boumediene (5) , Emmanuel Busato (5) , D. Calvet (5) , S. Calvet (5) , J. Donini (5) , E. Dubreuil (5) , G. Gilles (5) , Ph. Gris (5) , H. Liao (5) , R. Madar (5) , D. Pallin (5) , S.M. Romano Saez (5) , C. Santoni (5) , D. Simon (5) , Timothée Theveneaux-Pelzer (5) , F. Vazeille (5) , S. Albrand (6) , J. Brown (6) , J. Collot (6) , S. Crépé-Renaudin (6) , P.A. Delsart (6) , C. Gabaldon (6) , M.H. Genest (6) , J.Y. Hostachy (6) , F. Ledroit-Guillon (6) , A. Lleres (6) , A. Lucotte (6) , F. Malek (6) , C. Monini (6) , J. Stark (6) , B. Trocmé (6) , M. Wu (6) , L. Alio (1) , M. Barbero (1) , Y. Coadou (1) , C. Diaconu (1) , Sara Diglio (1) , F. Djama (1) , O. Duccu (1) , L. Feligioni (1) , J. Gao (1) , G.D. Hallewell (1) , F. Hubaut (1) , S.J. Kahn (1) , E. B. F. G. Knoops (1) , E. Le Guirriec (1) , J. Liu (1) , K. Liu (1) , D. Madaffari (1) , K. Mochizuki (1) , E. Monnier (1) , S. Muanza (1) , Y. Nagai (1) , E. Nagy (1) , P. Pralavorio (1) , A. Rozanov (1) , T. Serre (1) , M. Talby (1) , R.E. Ticse Torres (1) , E. Tiouchichine (1) , S. Tisserant (1) , J. Toth (1) , F. Touchard (1) , L. Vacavant (1)
G. Aad
D. Rousseau
N. Berger
T. Hryn’ova
S. Calvet
Y. Coadou

Résumé

A search for Higgs boson pair production $pp \to hh$ is performed with 19.5 fb$^{-1}$ of proton--proton collision data at $\sqrt{s}=$ 8 TeV, which were recorded by the ATLAS detector at the Large Hadron Collider in 2012. The decay products of each Higgs boson are reconstructed as a high-momentum $b\bar{b}$ system with either a pair of small-radius jets or a single large-radius jet, the latter exploiting jet substructure techniques and associated $b$-tagged track-jets. No evidence for resonant or non-resonant Higgs boson pair production is observed. The data are interpreted in the context of the Randall--Sundrum model with a warped extra dimension as well as the two-Higgs-doublet model. An upper limit on the cross-section for $pp \to G^{*}_{\mathrm{KK}} \to hh \to b\bar{b} b\bar{b}$ of 3.2 (2.3) fb is set for a Kaluza--Klein graviton $G^{*}_{\mathrm{KK}}$ mass of 1.0 (1.5) TeV, at the 95\% confidence level. The search for non-resonant Standard Model $hh$ production sets an observed 95\% confidence level upper limit on the production cross-section $\sigma(pp \to hh \to b\bar{b}b\bar{b})$ of 202 fb, compared to a SM prediction of $\sigma(pp \to hh \to b\bar{b}b\bar{b}) = 3.6 \pm 0.5$ fb.

Dates et versions

in2p3-01158913 , version 1 (02-06-2015)

Identifiants

Citer

G. Aad, M.K. Ayoub, A. Bassalat, C. Becot, S. Binet, et al.. Search for Higgs boson pair production in the $b\bar{b} b\bar{b}$ final state from $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector. European Physical Journal C: Particles and Fields, 2015, 75, pp.412. ⟨10.1140/epjc/s10052-015-3628-x⟩. ⟨in2p3-01158913⟩
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