Probing active-sterile neutrino transition magnetic moment on coherent elastic solar neutrino-nucleus scattering

TL;DR

This paper investigates how active-sterile neutrino transition magnetic moments can be constrained through coherent elastic solar neutrino-nucleus scattering, providing new experimental limits and future sensitivity projections.

Contribution

It introduces a novel method to probe active-sterile neutrino transition magnetic moments via neutrino upscattering in coherent scattering experiments, with updated limits and future prospects.

Findings

New limits on transition magnetic moments from CDEX-10 data

Projected sensitivities could explore previously untested parameter space

Sterile neutrino masses up to approximately 10 MeV are considered

Abstract

In the presence of a transition magnetic moment between active and sterile neutrinos, sterile neutrinos could be produced by neutrino beams electromagnetically upscattering on nuclei. We study the active-sterile neutrino transition magnetic moment through this upscattering in the coherent elastic neutrino-nucleus scattering process induced by solar neutrinos. We place new limits on the transition magnetic moment-sterile neutrino mass plane using the latest data from the CDEX-10 experiment. We also provide projected sensitivities for future measurements. We observe that the projected sensitivities could cover some regions of the parameter space which were previously unexplored for the sterile neutrino mass up to $\sim$10 MeV.