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

Abstract

The detection potential of the active neutrino magnetic moment (${\nu }_a$MM) and the active sterile transition magnetic moment (${\nu }_s$MM) of the solar neutrino CE$\nu$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 ${\nu }_a$MM approaches to the level between $10^{-10}{\mu }_B$ and $10^{-11}{\mu }_B$, which is dominantly limited by the detection threshold. On the other hand, the future solar neutrino CE$\nu$NS detection would be powerful in probing the ${\nu }_s$MM for the sterile neutrino mass below 10 MeV, which could unambiguously test the ${\nu }_s$MM explanation of the Xenon1T excess. The sensitivity in the general framework with both ${\nu }_a$MM and ${\nu }_s$MM contributions is also derived.

Comments: 22 pages, 5 figures