Revisiting the number-theory dark matter scenario and the weak gravity conjecture
Revisiting the number-theory dark matter scenario and the weak gravity conjecture
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重新审视数论暗物质场景和弱引力猜想
DOI:
10.1016/j.physletb.2019.01.013
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发表时间:
2019
影响因子:
4.4
通讯作者:
Yanagida Tsutomu T.
中科院分区:
文献类型:
--
作者:
Nakayama Kazunori;Takahashi Fuminobu;Yanagida Tsutomu T.
We revisit the number-theory dark matter scenario where one of the light chiral fermions required by the anomaly cancellation conditions of U (1) BL explains dark matter. Focusing on some of the integer BL charge assignments, we explore a new region of the parameter space where there appear two light fermions and the heavier one becomes a dark matter of mass≲ O (10) keV or O (10) MeV. The dark matter radiatively decays into neutrino and photon, which can explain the tantalizing hint of the 3.55 keV X-ray line excess. Interestingly, the other light fermion can erase the AdS vacuum around the neutrino mass scale in a compactification of the standard model to 3D. This will make the standard model consistent with the AdS-WGC statement that stable non-supersymmetric AdS vacua should be absent.
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