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

Published version
Peer-reviewed

Type

Article

Change log

Authors

Collaboration, ATLAS 

Abstract

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 protonproton 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 ppHZγ 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.

Description

Keywords

hep-ex, hep-ex

Journal Title

Physics Letters B: Nuclear Physics and Particle Physics

Conference Name

Journal ISSN

0370-2693
1873-2445

Volume Title

809

Publisher

Elsevier
Sponsorship
Science and Technology Facilities Council (ST/N000234/1)