Probing neutrino magnetic moments and the Xenon1T excess with coherent elastic solar neutrino scattering
Yufeng Li, Shuo-yu Xia
Abstract
The detection potential of the active neutrino magnetic moment (${\ensuremath{\nu}}_{a}\mathrm{MM}$) and the active sterile transition magnetic moment (${\ensuremath{\nu}}_{s}\mathrm{MM}$) in the solar neutrino $\mathrm{CE}\ensuremath{\nu}\mathrm{NS}$ process from 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 ${\ensuremath{\nu}}_{a}\mathrm{MM}$ approaches to the level between ${10}^{\ensuremath{-}10}{\ensuremath{\mu}}_{B}$ and ${10}^{\ensuremath{-}11}{\ensuremath{\mu}}_{B}$, which is dominantly limited by the detection threshold. On the other hand, the future solar neutrino $\mathrm{CE}\ensuremath{\nu}\mathrm{NS}$ detection would be powerful in probing the ${\ensuremath{\nu}}_{s}\mathrm{MM}$ for the sterile neutrino mass below 10 MeV, which can unambiguously test the ${\ensuremath{\nu}}_{s}\mathrm{MM}$ explanation of the Xenon1T excess. The sensitivity in the general framework with both ${\ensuremath{\nu}}_{a}\mathrm{MM}$ and ${\ensuremath{\nu}}_{s}\mathrm{MM}$ contributions is also derived.