科研之友
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摘要
Under rather generic assumptions, we show that, in asymmetric dark matter (ADM) scenarios in which the ADM sector was in chemical equilibrium with the standard model sector in early epochs, the sign of the B - L asymmetry stored in the dark matter sector and the standard model sector are always the same. One particularly striking consequence of this result is that, when such an ADM decays or annihilates in the present universe, the resulting final state always involves an antineutrino. As a concrete example, we construct a composite ADM model and explore the feasibility of detecting such an antineutrino signal in atmospheric neutrino detectors.
- 出版日期2015-7-15
