2017/08/11 by ATLAS Collaboration, M. Aaboud, G. Aad +98
Physics and Astronomy · #Boson #Bottom quark #Electron #Higgs boson #High-Energy Particle Collisions Research #Large Hadron Collider #Lepton #Luminosity #Muon #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Quark #Standard Model (mathematical formulation) #Top quark #Yukawa potential #hep-ex
paper · pdf · doi:10.1007/jhep12(2017)024
published as JHEP 12 (2017) 024 · 68 pages in total, author list starting page 52, 13 figures, 15 tables, submitted to JHEP, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2016-29/. This version matches submission to JHEP
arxiv created 2017/08/11 · openalex publication_date 2017/12/01 · arxiv updated 2017/12/15 · openalex created_date 2018/01/26 · openalex updated_date 2026/08/06
A search for the decay of the Standard Model Higgs boson into a b b 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 , W and Z . 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.) +0.21 -0.19 (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.