Minimal semi-annihilating ℤ_N scalar dark matter

2014/03/19 by Geneviève Bélanger, Kristjan Kannike, Alexander Pukhov +1 · 1 citation
Physics and Astronomy · #astro-ph.CO #hep-ph

paper · pdf · doi:10.1088/1475-7516/2014/06/021

41 pages, 12 figures

arxiv created 2014/03/19 · arxiv updated 2015/06/19

Abstract

We study the dark matter from an inert doublet and a complex scalar singlet stabilized by ℤ_N symmetries. This field content is the minimal one that allows dimensionless semi-annihilation couplings for N > 2. We consider explicitly the ℤ₃ and ℤ₄ cases and take into account constraints from perturbativity, unitarity, vacuum stability, necessity for the electroweak ℤ_N preserving vacuum to be the global minimum, electroweak precision tests, upper limits from direct detection and properties of the Higgs boson. Co-annihilation and semi-annihilation of dark sector particles as well as dark matter conversion significantly modify the cosmic abundance and direct detection phenomenology.

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