A search for the $Z\gamma$ decay mode of the Higgs boson in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector - INSPIRE

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A search for the $Z\gamma$ decay mode of the Higgs boson in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector

ATLAS

Collaboration

May 11, 2020

37 pages

Published in:

Phys.Lett.B 809 (2020) 135754

Published: Oct 10, 2020

e-Print:

2005.05382 [hep-ex]

DOI:

10.1016/j.physletb.2020.135754 (publication)

PDG:

{{\mathit Z}}{{\mathit \gamma}}

Report number:

CERN-EP-2020-052

Experiments:

CERN-LHC-ATLAS

View in:

reference search136 citations

Citations per year

Abstract: (Elsevier)

A search for the Zγ decay of the Higgs boson, with Z boson decays into pairs of electrons or muons is presented. The analysis uses proton–proton collision data at s = 13 TeV corresponding to an integrated luminosity of 139 fb −1 recorded by the ATLAS detector at the Large Hadron Collider. The observed data are consistent with the expected background with a p -value of 1.3%. An upper limit at 95% confidence level on the production cross-section times the branching ratio for pp→H→Zγ is set at 3.6 times the Standard Model prediction while 2.6 times is expected in the presence of the Standard Model Higgs boson. The best-fit value for the signal yield normalised to the Standard Model prediction is 2.0−0.9+1.0 where the statistical component of the uncertainty is dominant.

Note:

37 pages in total, author list starting page 21, 2 figures, 3 tables, submitted to PLB. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2018-42

electron positron: annihilation
electron positron: colliding beams
p p: colliding beams
upsilon mesons: hadroproduction
upsilon mesons: electroproduction
bottomonium: production
heavy ion: scattering
p nucleus: interaction
lead
quark gluon: plasma

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