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 CEνNS 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 CEνNS 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.

Neutrino Magnetic Moments Meet Precision $N_{\rm eff}$ Measurements

“…Large NMM have motivated extensive searches in laboratories as well as astrophysical and cosmological observations. Laboratory searches are mostly based on the measurement of low-energy neutrino scattering [14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Astrophysical bounds from stellar energy loss, though vulnerable to uncertainties of astrophysical models, have long been stronger than laboratory ones [28].…”

Unique Probe of Neutrino Electromagnetic Moments with Radiative Pair Emission

“…The excess has prompted many studies on the neutrino magnetic properties including active-to-active [18][19][20] and active-to-sterile magnetic moments [21,22]. Future DM direct detection experiments can further improve the sensitivity [23][24][25][26].…”