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Oxana Smirnova

Oxana Smirnova

Senior Lecturer, Deputy Head of division

Oxana Smirnova

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

Author

  • Aad G.
  • T. Åkesson
  • S. Bocchetta
  • E. Corrigan
  • C. Doglioni
  • J. Geisen
  • K. Gregersen
  • E. Hansen
  • V. Hedberg
  • G. Jarlskog
  • E. Kellermann
  • B. Konya
  • E. Lytken
  • K. Mankinen
  • C. Marcon
  • J. Mjörnmark
  • G. Mullier
  • R. Poettgen
  • T. Poulsen
  • E. Skorda
  • O. Smirnova
  • Zwalinski L.

Summary, in English

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. © 2020 The Author

Department/s

  • Particle and nuclear physics
  • eSSENCE: The e-Science Collaboration

Publishing year

2020-10-10

Language

English

Publication/Series

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

Volume

809

Document type

Journal article

Publisher

Elsevier

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0370-2693