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arXiv 2104.01334hep-phastro-ph.COhep-th
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轴子不育中微子暗物质

Axion-Sterile-Neutrino Dark Matter

Alberto Salvio, Simone Scollo

摘要:

用三个右手中微子和一个简单的QCD轴子扇区扩展标准模型可以解释中微子振荡、暗物质和重子不对称性;同时,它解决了强CP问题,稳定了电弱真空,并可以实现临界希格斯暴胀(满足所有当前的观测边界)。我们在这里进行一般分析的暗物质(DM)在这样一个模型,我们称之为$aν$ MSM。虽然关键的希格斯通货膨胀的特点(准)拐点的暴胀子潜力,我们表明,DM不能收到的贡献,从原始黑洞的$aν$ MSM。这导致一个多组分轴子不育中微子DM,并允许我们与轴子参数,如轴子衰变常数,中微子参数。我们包括几个DM生产机制:轴子生产通过错位和衰变的拓扑缺陷,以及无菌中微子生产通过共振和非共振机制,并在最近提出的CPT对称宇宙。

英文摘要:

Extending the Standard Model with three right-handed neutrinos and a simple QCD axion sector can account for neutrino oscillations, dark matter and baryon asymmetry; at the same time, it solves the strong CP problem, stabilizes the electroweak vacuum and can implement critical Higgs inflation (satisfying all current observational bounds). We perform here a general analysis of dark matter (DM) in such a model, which we call the $aν$MSM. Although critical Higgs inflation features a (quasi) inflection point of the inflaton potential we show that DM cannot receive a contribution from primordial black holes in the $aν$MSM. This leads to a multicomponent axion-sterile-neutrino DM and allows us to relate the axion parameters, such as the axion decay constant, to the neutrino parameters. We include several DM production mechanisms: the axion production via misalignment and decay of topological defects as well as the sterile-neutrino production through the resonant and non-resonant mechanisms and in the recently proposed CPT-symmetric universe.

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