de Gouvêa André, Sen Manibrata, Tangarife Walter, Zhang Yue
Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA.
Department of Physics, University of California Berkeley, Berkeley, California 94720, USA.
Phys Rev Lett. 2020 Feb 28;124(8):081802. doi: 10.1103/PhysRevLett.124.081802.
keV-scale gauge-singlet fermions, when allowed to mix with the active neutrinos, are elegant dark matter (DM) candidates. They are produced in the early Universe via the Dodelson-Widrow mechanism and can be detected as they decay very slowly, emitting x-rays. In the absence of new physics, this hypothesis is virtually ruled out by astrophysical observations. Here, we show that new interactions among the active neutrinos allow these sterile neutrinos to make up all the DM while safely evading all current experimental bounds. The existence of these new neutrino interactions may manifest itself in next-generation experiments, including DUNE.
keV量级的规范单态费米子，当允许其与活性中微子混合时，是优雅的暗物质（DM）候选者。它们在早期宇宙中通过多德尔森 - 威德罗机制产生，并且由于它们衰变非常缓慢并发射X射线，所以可以被探测到。在没有新物理的情况下，这个假设实际上已被天体物理观测排除。在这里，我们表明活性中微子之间的新相互作用允许这些惰性中微子构成所有的暗物质，同时安全地避开所有当前的实验限制。这些新的中微子相互作用的存在可能会在包括DUNE在内的下一代实验中显现出来。
