Elastic neutrino-atom scattering as a probe of neutrino millicharge and magnetic moment

Abstract

Neutrino scattering on atomic systems at low-energy transfer is a powerful tool for searching the neutrino electromagnetic interactions. The regime of coherent elastic neutrino-atom scattering, i.e., when the atom recoils as a pointlike particle, can be effectively fulfilled in the case of tritium antineutrinos. We present theoretical calculations for coherent elastic neutrino-atom scattering processes on such targets as the H, ${}^2$H, ${}^3$He, and ${}^4$He %, and ${}^{12}$C atoms. We show how the atomic effects and neutrino electromagnetic properties, namely the neutrino millicharge and magnetic moment, may manifest themselves in the atomic-recoil spectra. Our results can be used in planning the experiments on coherent elastic neutrino-atom scattering (in particular, with superfluid He-4).

Comments: 4 pages, based on the presentation at the 41st International Conference on High Energy Physics (ICHEP2022 6-13 July 2022, Bologna, Italy), prepared for the ICHEP2022 proceedings