arXiv 2105.056132021-05-12hep-ph

中微子对太阳中暗生暗物质相互作用的限制

Neutrino constraints to scotogenic dark matter interacting in the Sun

Thede de Boer, Raffaela Busse, Alexander Kappes, Michael Klasen, Sybrand Zeinstra

备注：: contribution to the 2021 EW session of the 55th Rencontres de Moriond. Full article: arXiv:2105.04899

摘要：

辐射跷跷板模型除了产生中微子质量外，还具有提供暗物质候选者的吸引人的特性。在这里，我们提出了一个研究的中微子信号的湮灭暗物质粒子已被引力捕获在太阳中，在暗生模型的框架。我们计算预期的事件发生率在冰立方探测器在其86串配置。由于费米子暗物质不积累在太阳中，我们研究标量暗物质的情况下，扫描参数空间。由于两个中性标量分量之间的自然小质量分裂，与核子的非弹性散射过程可以发生。我们发现，对于小质量分裂，该模型产生非常高的事件率。如果IceCube的详细分析可以排除这些参数点，我们的发现可以转化为模型中标量耦合之一的下限。对于较大的质量分裂，只需要考虑弹性情况。我们发现，在这种情况下，XENON1T限制排除了所有具有足够大的事件发生率的点。

英文摘要：

Radiative seesaw models have the attractive property of providing dark matter candidates in addition to generation of neutrino masses. Here we present a study of neutrino signals from the annihilation of dark matter particles which have been gravitationally captured in the Sun, in the framework of the scotogenic model. We compute expected event rates in the IceCube detector in its 86-string configuration. As fermionic dark matter does not accumulate in the Sun, we study the case of scalar dark matter, with a scan over the parameter space. Due to a naturally small mass splitting between the two neutral scalar components, inelastic scattering processes with nucleons can occur. We find that for small mass splittings, the model yields very high event rates. If a detailed analysis at IceCube can exclude these parameter points, our findings can be translated into a lower limit on one of the scalar couplings in the model. For larger mass splittings only the elastic case needs to be considered. We find that in this scenario the XENON1T limits exclude all points with sufficiently large event rates.

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