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Evidence for the H -> b(b)over-bar decay with the ATLAS detector

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dc.contributor.author ATLAS Collaboration
dc.contributor.author Aaboud, M.
dc.contributor.author Albert, Justin
dc.contributor.author Chiu, Y. H.
dc.contributor.author Elliot, Alison A.
dc.contributor.author Fincke-Keeler, J.
dc.contributor.author Hamano, Kenji
dc.contributor.author Hill, Ewan Chin
dc.contributor.author Keeler, Richard
dc.contributor.author Kowalewski, Robert
dc.contributor.author Kuwertz, E. S.
dc.contributor.author Kwan, Tony
dc.contributor.author LeBlanc, Matthew Edgar
dc.contributor.author Lefebvre, Michel
dc.contributor.author McPherson, Robert A.
dc.contributor.author Seuster, Rolf
dc.contributor.author Sobie, Randall J.
dc.contributor.author Trovatelli, M.
dc.contributor.author Venturi, M.
dc.contributor.author et al.
dc.date.accessioned 2019-10-07T18:51:25Z
dc.date.available 2019-10-07T18:51:25Z
dc.date.copyright 2017 en_US
dc.date.issued 2017
dc.identifier.citation The ATLAS collaboration; Aaboud, M.; Aad, G.; Abbott, B.; Abdinov, O.; Abeloos, B.; … & Zwalinski, L. (2017). Evidence for the H -> b(b)over-bar decay with the ATLAS detector. Journal of High Energy Physics, 2017(12), article 24. DOI: 10.1007/JHEP12(2017)024 en_US
dc.identifier.uri https://doi.org/10.1007/JHEP12(2017)024
dc.identifier.uri http://hdl.handle.net/1828/11224
dc.description.abstract A search for the decay of the Standard Model Higgs boson into a b (b) over bar pair when produced in association with a W or Z boson is performed with the ATLAS detector. The analysed data, corresponding to an integrated luminosity of 36.1 fb(-1), were collected in proton-proton collisions in Run 2 of the Large Hadron Collider at a centre-of-mass energy of 13 TeV. Final states containing zero, one and two charged leptons (electrons or muons) are considered, targeting the decays Z -> vv, W -> lv and Z -> ll. For a Higgs boson mass of 125 GeV, an excess of events over the expected background from other Standard Model processes is found with an observed significance of 3.5 standard deviations, compared to an expectation of 3.0 standard deviations. This excess provides evidence for the Higgs boson decay into b-quarks and for its production in association with a vector boson. The combination of this result with that of the Run 1 analysis yields a ratio of the measured signal events to the Standard Model expectation equal to 0.90 +/- 0.18(stat.)(-0.19)(+0.21)(syst.). Assuming the Standard Model production cross-section, the results are consistent with the value of the Yukawa coupling to b-quarks in the Standard Model. en_US
dc.description.sponsorship We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS, CEA-DSM/IRFU, France; SRNSF, Georgia; BMBF, HGF, and MPG, Germany; GSRT, Greece; RGC, Hong Kong SAR, China; ISF, I-CORE and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MNiSW and NCN, Poland; FCT, Portugal; MNE/IFA, Romania; MES of Russia and NRC KI, Russian Federation; JINR; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZS, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, the Canada Council, CANARIE, CRC, Compute Canada, FQRNT, and the Ontario Innovation Trust, Canada; EPLANET, ERC, ERDF, FP7, Horizon 2020 and Marie Sklodowska-Curie Actions, European Union; Investissements d'Avenir Labex and Idex, ANR, Region Auvergne and Fondation Partager le Savoir, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF; BSF, GIF and Minerva, Israel; BRF, Norway; CERCA Programme Generalitat de Catalunya, Generalitat Valenciana, Spain; the Royal Society and Leverhulme Trust, United Kingdom. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (U.K.) and BNL (U.S.A.), the Tier-2 facilities worldwide and large non-WLCG resource providers. Major contributors of computing resources are listed in ref. en_US
dc.language.iso en en_US
dc.publisher Journal of High Energy Physics en_US
dc.subject Hadron-Hadron scattering (experiments) en_US
dc.subject Higgs physics en_US
dc.title Evidence for the H -> b(b)over-bar decay with the ATLAS detector en_US
dc.type Article en_US
dc.description.scholarlevel Faculty en_US
dc.description.reviewstatus Reviewed en_US


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