## arXiv Analytics

### arXiv:1708.03299 [hep-ex]AbstractReferencesReviewsResources

#### Evidence for the $H \to b\bar{b}$ decay with the ATLAS detector

Published 2017-08-10Version 1

A search for the decay of the Standard Model Higgs boson into a $b\bar{b}$ 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 $Z\to\nu\nu$, $W\to\ell\nu$ and $Z\to\ell\ell$. 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 $0.90 \pm 0.18 \rm{(stat.)} ^{+0.21}_{-0.19} \rm{(syst.)}$. 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.

Comments: 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/
Categories: hep-ex
Related articles: Most relevant | Search more
arXiv:1207.7214 [hep-ex] (Published 2012-07-31, updated 2012-08-31)
Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
arXiv:0910.0193 [hep-ex] (Published 2009-10-01)
Discovery Potential of the Standard Model Higgs Boson Through H -> WW Decay Mode with the ATLAS Detector at LHC
arXiv:1207.0319 [hep-ex] (Published 2012-07-02, updated 2012-07-13)
Combined search for the Standard Model Higgs boson in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector