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arXiv 2104.02030hep-ph
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弱相互作用暗物质的跷跷板机制印记与重子不对称性

Imprint of the seesaw mechanism on feebly interacting dark matter and the baryon asymmetry

Arghyajit Datta, Rishav Roshan, Arunansu Sil

摘要:

我们表明,I型跷跷板,负责产生轻中微子质量,本身是能够容纳的三个右手中微子之一,作为一个冻结在类型的暗物质(DM),其中所需的相关耦合的小连接到(最小的)活动中微子质量的亮度。结果表明:(a)具有$\lesssim \mathcal{O}(1)$ MeV质量的DM的非热产生(通过$W, Z$玻色子和SM希格斯粒子的衰变)与遗迹密度一致,以及(b)它的稳定性决定了这个最小的活性中微子质量唯一的$\sim {\mathcal{O}}(10^{-12})$ eV。另一方面,在这种情况下(考虑到最新的中微子数据和希格斯真空稳定性问题)的味道leptogenesis的研究固定了另外两个右手中微子的规模。

英文摘要:

We show that the type-I seesaw, responsible for generating the light neutrino mass, itself is capable of accommodating one of the three right handed neutrinos as a freeze-in type of dark matter (DM) where the required smallness of the associated coupling is connected to the lightness of the (smallest) active neutrino mass. It turns out that (a) the non-thermal production of DM having mass $\lesssim \mathcal{O}(1)$ MeV (via decays of $W, Z$ bosons and SM Higgs) consistent with relic density as well as (b) its stability determine this smallest active neutrino mass uniquely $\sim {\mathcal{O}}(10^{-12})$ eV. On the other hand, the study of flavor leptogenesis in this scenario (taking into account the latest neutrino data and Higgs vacuum stability issue) fixes the scale of two other right handed neutrinos.

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