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arXiv · 0903.4010

Scalar Multiplet Dark Matter

T. Hambye·F. -S. Ling·L. Lopez Honorez·J. Rocher
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Abstract

We perform a systematic study of the phenomenology associated to models where the dark matter consists in the neutral component of a scalar SU(2)_L n-uplet, up to n=7. If one includes only the pure gauge induced annihilation cross-sections it is known that such particles provide good dark matter candidates, leading to the observed dark matter relic abundance for a particular value of their mass around the TeV scale. We show that these values actually become ranges of values -which we determine- if one takes into account the annihilations induced by the various scalar couplings appearing in these models. This leads to predictions for both direct and indirect detection signatures as a function of the dark matter mass within these ranges. Both can be largely enhanced by the quartic coupling contributions. We also explain how, if one adds right-handed neutrinos to the scalar doublet case, the results of this analysis allow to have altogether a viable dark matter candidate, successful generation of neutrino masses, and leptogenesis in a particularly minimal way with all new physics at the TeV scale.

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T. Hambye, F. -S. Ling, L. Lopez Honorez, J. Rocher. 2009-03-24. Scalar Multiplet Dark Matter. https://doi.org/10.1088/1126-6708/2009/07/090 10.1007/jhep05(2010)066

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