Search for the Standard Model Higgs boson decaying into bb¯ produced in association with top quarks decaying hadronically in pp collisions at s√=8 TeV with the ATLAS detector - IN2P3 - Institut national de physique nucléaire et de physique des particules
Article Dans Une Revue Journal of High Energy Physics Année : 2016

Search for the Standard Model Higgs boson decaying into bb¯ produced in association with top quarks decaying hadronically in pp collisions at s√=8 TeV with the ATLAS detector

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

Résumé

A search for Higgs boson production in association with a pair of top quarks (tt¯H) is performed, where the Higgs boson decays to bb¯, and both top quarks decay hadronically. The data used correspond to an integrated luminosity of 20.3 fb−1 of pp collisions at s√=8 TeV collected with the ATLAS detector at the Large Hadron Collider. The search selects events with at least six energetic jets and uses a boosted decision tree algorithm to discriminate between signal and Standard Model background. The dominant multijet background is estimated using a dedicated data-driven technique. For a Higgs boson mass of 125 GeV, an upper limit of 6.4 (5.4) times the Standard Model cross section is observed (expected) at 95% confidence level. The best-fit value for the signal strength is μ=1.6±2.6 times the Standard Model expectation for mH=125 GeV. Combining all tt¯H searches carried out by ATLAS at s√=8 and 7 TeV, an observed (expected) upper limit of 3.1 (1.4) times the Standard Model expectation is obtained at 95% confidence level, with a signal strength μ=1.7±0.8.

Dates et versions

in2p3-01302317 , version 1 (14-04-2016)

Identifiants

Citer

G. Aad, S. Albrand, S. Berlendis, C. Camincher, J. Collot, et al.. Search for the Standard Model Higgs boson decaying into bb¯ produced in association with top quarks decaying hadronically in pp collisions at s√=8 TeV with the ATLAS detector. Journal of High Energy Physics, 2016, 05, pp.160. ⟨10.1007/JHEP05(2016)160⟩. ⟨in2p3-01302317⟩
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