Scalar sector phenomenology of three-loop radiative neutrino mass models

Amine Ahriche, Kristian L. McDonald, and Salah Nasri
Phys. Rev. D 92, 095020 – Published 20 November 2015

Abstract

We perform a phenomenological study of the scalar sector of two models that generate neutrino mass at the three-loop level and contain viable dark matter candidates. Both models contain a charged singlet scalar and a larger scalar multiplet (triplet or quintuplet). We investigate the effect of the extra scalars on the Higgs mass and analyze the modifications to the triple Higgs coupling. The new scalars can give observable changes to the Higgs decay channel hγγ and, furthermore, we find that the electroweak phase transition becomes strongly first order in large regions of parameter space.

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  • Received 2 September 2015

DOI:https://doi.org/10.1103/PhysRevD.92.095020

© 2015 American Physical Society

Authors & Affiliations

Amine Ahriche1,2,*, Kristian L. McDonald3,†, and Salah Nasri4,‡

  • 1Department of Physics, University of Jijel, PB 98 Ouled Aissa, DZ-18000 Jijel, Algeria
  • 2The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, I-34014 Trieste, Italy
  • 3ARC Centre of Excellence for Particle Physics at the Terascale, School of Physics, The University of Sydney, New South Wales 2006, Australia
  • 4Physics Department, UAE University, P.O. Box 17551, Al Ain, United Arab Emirates

  • *aahriche@ictp.it
  • kristian.mcdonald@sydney.edu.au
  • snasri@uaeu.ac.ae

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Vol. 92, Iss. 9 — 1 November 2015

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