Inflation and DM phenomenology in a scotogenic model extended with a real singlet scalar
Inflation and DM phenomenology in a scotogenic model extended with a real singlet scalar
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用实单线态标量扩展的 scotogenic 模型中的通货膨胀和 DM 现象学
DOI：
10.1103/physrevd.102.115041
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发表时间：
2020
影响因子：
5
通讯作者：
Suematsu Daijiro
中科院分区：
文献类型：
--
作者：
Hashimoto Tsuyoshi;Suematsu Daijiro
本文研究了具有真实的单重标量的暗生模型的推广。它给出了右手中微子质量的来源，并通过与Ricci标量的非极小耦合起着暴胀子的作用。虽然惰性双重标量是模型中中微子质量产生不可或缺的成分，但它也是一个有希望的暗物质（DM）候选者。如果单重态标量的质量处于共振区，单重态标量的引入会影响DM的性质。我们集中我们的研究在这样的情况下，暴胀子质量预计将在TeV范围内，再加热温度小于。因此，该模型需要低规模的leptogenesis。在考察了单重标量对DM扇区的影响后，我们讨论了DM现象，如高能中微子和单色γ引起的湮灭。
We study an extension of the scotogenic model with a real singlet scalar. It gives an origin of the mass of right-handed neutrinos and plays a role of inflaton through a nonminimal coupling with Ricci scalar. While an inert doublet scalar is an indispensable ingredient for neutrino mass generation in the model, it is also a promising dark matter (DM) candidate. Introduction of the singlet scalar could affect its nature of DM if mass of the singlet scalar is in a resonance region. We focus our study on such a case where inflaton mass is expected to be in a TeV range and reheating temperature is less than. Thus the model requires low scale leptogenesis. After examining several effects brought about by the singlet scalar for the DM sector, we discuss DM phenomenology such as high energy neutrinos and monochromatic gammas caused by its annihilation.