Low scale leptogenesis in a model with promising CP structure
Low scale leptogenesis in a model with promising CP structure
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具有前景 CP 结构的模型中的低规模轻体发生
DOI：
10.1140/epjc/s10052-021-09109-5
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Suematsu Daijiro
中科院分区：
文献类型：
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作者：
Tsuyoshi Hashimoto;Norma Sidik Risdianto;Daijiro Suematsu;Suematsu Daijiro
我们考虑了标准模型的一个简单的扩展，它可以通过Peccei-Quinn机制和Nelson-Barr机制来解决其CP问题。它的低能有效模型与轻子区的暗生模型一致。虽然在简单的跷跷板和暗生框架中，在比GeV更低的再加热温度下，leptogenesis并不能很好地工作，但这样低的再加热温度可能与中微子质量产生和热leptogenesis通过新引入的场一致，而不涉及共振效应。另一种暗物质的候选人轴子准备作为一个不可或缺的成分模型。
We consider a simple extension of the standard model, which could give a solution to itsCPissues through both the Peccei–Quinn mechanism and the Nelson–Barr mechanism. Its low energy effective model coincides with the scotogenic model in the leptonic sector. Although leptogenesis is known not to work well at lower reheating temperature thanGeV in simple seesaw and scotogenic frameworks, such low reheating temperature could be consistent with both neutrino mass generation and thermal leptogenesis via newly introduced fields without referring to the resonance effect. An alternative dark matter candidate to axion is prepared as an indispensable ingredient of the model.