Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/57609

TitleObservation of H→bb¯ decays and VH production with the ATLAS detector
Author(s)Onofre, A.
Castro, Nuno Filipe Silva Fernandes
ATLAS Collaboration
Issue date2018
PublisherElsevier B.V.
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
CitationAaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., Abhayasinghe, D. K., . . . Zwalinski, L. (2018). Observation of H→bb¯ decays and VH production with the ATLAS detector. [Article]. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 786, 59-86. doi: 10.1016/j.physletb.2018.09.013
Abstract(s)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 data, corresponding to an integrated luminosity of 79.8 fb(-1) were collected in proton-proton collisions during Run 2 of the Large Hadron Collider at a centre-of-mass energy of 13 TeV. 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 (expected) significance of 4.9 (4.3) standard deviations. A combination with the results from other searches in Run 1 and in Run 2 for the Higgs boson in the bb decay mode is performed, which yields an observed (expected) significance of 5.4 (5.5) standard deviations, thus providing direct observation of the Higgs boson decay into b-quarks. The ratio of the measured event yield for a Higgs boson decaying into b (b) over bar to the Standard Model expectation is 1.01 +/- 0.12(stat.) (-0.15) (+0.16)(syst.). Additionally, a combination of Run 2 results searching for the Higgs boson produced in association with a vector boson yields an observed (expected) significance of 5.3 (4.8) standard deviations. (C) 2018 The Author(s). Published by Elsevier B.V.
TypeArticle
URIhttp://hdl.handle.net/1822/57609
DOI10.1016/j.physletb.2018.09.013
ISSN0370-2693
e-ISSN1873-2445
Peer-Reviewedyes
AccessOpen access
Appears in Collections:LIP - Artigos/papers

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