Probing neutrino magnetic moments and the XENON1T excess with coherent elastic solar neutrino scattering

Abstract

The detection potential of the active neutrino magnetic moment ($ν_{a}$MM) and the active sterile transition magnetic moment ($ν_{s}$MM) of the solar neutrino CE$ν$NS process in future Dark Matter direct detection experiments is studied and compared with the respective allowed range to explain the Xenon1T excess. We find that the sensitivity to the $ν_{a}$MM approaches to the level between $10^{-10}μ_B$ and $10^{-11}μ_B$, which is dominantly limited by the detection threshold. On the other hand, the future solar neutrino CE$ν$NS detection would be powerful in probing the $ν_{s}$MM for the sterile neutrino mass below 10 MeV, which could unambiguously test the $ν_{s}$MM explanation of the Xenon1T excess. The sensitivity in the general framework with both $ν_{a}$MM and $ν_{s}$MM contributions is also derived.