Dark matter and neutrino masses from a scale-invariant multi-Higgs portal

2015/08/31 by Alexandros Karam, Kyriakos Tamvakis · 2 citations
Physics and Astronomy · #hep-ph

paper · pdf · doi:10.1103/physrevd.92.075010

published as Phys. Rev. D 92, 075010 (2015) · 28 pages, 9 figures. References added, typos fixed; matches version published in PRD

arxiv created 2016/02/02 · arxiv updated 2016/02/03

Abstract

We consider a classically scale invariant version of the Standard Model, extended by an extra dark SU(2)_X gauge group. Apart from the dark gauge bosons and a dark scalar doublet which is coupled to the Standard Model Higgs through a portal coupling, we incorporate right-handed neutrinos and an additional real singlet scalar field. After symmetry breaking à la Coleman-Weinberg, we examine the multi-Higgs sector and impose theoretical and experimental constraints. In addition, by computing the dark matter relic abundance and the spin-independent scattering cross section off a nucleon we determine the viable dark matter mass range in accordance with present limits. The model can be tested in the near future by collider experiments and direct detection searches such as XENON 1T.

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• A scale invariant extension of the Georgi Machacek model
• Dark matter and neutrino masses from a classically scale-invariant multi-Higgs portal

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