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arXiv · 1603.05074

Leptogenesis, radiative neutrino masses and inert Higgs triplet dark matter

Wen-Bin Lu·Pei-Hong Gu
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Abstract

We extend the standard model by three types of inert fields including Majorana fermion singlets/triplets, real Higgs singlets/triplets and leptonic Higgs doublets. In the presence of a softly broken lepton number and an exactly conserved Z_2 discrete symmetry, these inert fields together can mediate a one-loop diagram for a Majorana neutrino mass generation. The heavier inert fields can decay to realize a successful leptogenesis while the lightest inert field can provide a stable dark matter candidate. As an example, we demonstrate the leptogenesis by the inert Higgs doublet decays. We also perform a systematic study on the inert Higgs triplet dark matter scenario where the interference between the gauge and Higgs portal interactions can significantly affect the dark matter properties.

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Wen-Bin Lu, Pei-Hong Gu. 2016-09-06. Leptogenesis, radiative neutrino masses and inert Higgs triplet dark matter. https://doi.org/10.1088/1475-7516%2F2016%2F05%2F040

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