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Higgs phenomenology as a probe of sterile neutrinos

Jonathan M. Butterworth1,*, Mikael Chala2,3,†, Christoph Englert4,‡, Michael Spannowsky2,§, and Arsenii Titov2,∥

  • 1Department of Physics & Astronomy, University College London, London WC1E 6BT, United Kingdom
  • 2Institute for Particle Physics Phenomenology, Durham University, Durham DH1 3LE, United Kingdom
  • 3Centro Andaluz de Física de Partículas and Departamento de Física Teórica y del Cosmos, Universidad de Granada, E–18071 Granada, Spain
  • 4Scottish Universities Physics Alliance, School of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom

  • *J.Butterworth@ucl.ac.uk
  • †mikael.chala@durham.ac.uk
  • ‡christoph.englert@glasgow.ac.uk
  • §michael.spannowsky@durham.ac.uk
  • ∥arsenii.titov@durham.ac.uk
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Phys. Rev. D 100, 115019 – Published 9 December, 2019

DOI: https://doi.org/10.1103/PhysRevD.100.115019

Abstract

Physics beyond the Standard Model can manifest itself as both new light states and heavy degrees of freedom. In this paper, we assume that the former comprise only a sterile neutrino, N. Therefore, the most agnostic description of the new physics is given by an effective field theory built upon the Standard Model fields as well as N. We show that Higgs phenomenology provides a sensitive and potentially crucial tool to constrain effective gauge interactions of sterile neutrinos, not yet probed by current experiments. In parallel, this motivates a range of new Higgs decay channels with clean signatures as candidates for the next LHC runs, including h→γ+pTmiss and h→γγ+pTmiss.

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Phys. Rev. D 100, 115019– Published 9 December, 2019
  • Received 20 September 2019
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