Search for the Higgs boson produced in association with a $W$ boson and decaying to four $b$-quarks via two spin-zero particles in $pp$ collisions at 13 TeV with the ATLAS detector - INSPIRE

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Search for the Higgs boson produced in association with a $W$ boson and decaying to four $b$ -quarks via two spin-zero particles in $pp$ collisions at 13 TeV with the ATLAS detector

ATLAS

Collaboration

Jun 27, 2016

41 pages

Published in:

Eur.Phys.J.C 76 (2016) 11, 605

Published: Nov 5, 2016

e-Print:

1606.08391 [hep-ex]

DOI:

10.1140/epjc/s10052-016-4418-9

PDG: Other Mass Limits

Report number:

CERN-EP-2016-135

Experiments:

CERN-LHC-ATLAS

View in:

reference search48 citations

Citations per year

Abstract: (Springer)

This paper presents a dedicated search for exotic decays of the Higgs boson to a pair of new spin-zero particles,

H \rightarrow aa

, where the particle a decays to b-quarks and has a mass in the range of 20–60 GeV. The search is performed in events where the Higgs boson is produced in association with a

W

boson, giving rise to a signature of a lepton (electron or muon), missing transverse momentum, and multiple jets from b-quark decays. The analysis is based on the full dataset of pp collisions at

\sqrt{s} = 13\,\mathrm{{TeV}}

recorded in 2015 by the ATLAS detector at the CERN Large Hadron Collider, corresponding to an integrated luminosity of 3.2

\text{ fb }^{-1}

. No significant excess of events above the Standard Model prediction is observed, and a

95\,\%

confidence-level upper limit is derived for the product of the production cross section for

pp \rightarrow WH

times the branching ratio for the decay

H \rightarrow aa \rightarrow 4b

. The upper limit ranges from 6.2 pb for an a-boson mass

m_a = 20\,\mathrm{{GeV}}

to 1.5 pb for

m_a = 60\,\mathrm{{GeV}}

.

Note:

26 pages plus author list (43 pages total), 7 figures, 3 tables, final version published in EPJC, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2016-01/

p p: scattering
p p: colliding beams
Higgs particle: hadroproduction
W: associated production
Higgs particle: decay
scalar particle: new particle
decay: exotic
W: leptonic decay
new particle: hadronic decay
jet: bottom

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Figures(14)

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