Neutrino electromagnetic properties and sterile dipole portal in light of the first solar CE$\nu$NS data

TL;DR

This paper explores how neutrino electromagnetic properties, such as magnetic moments and electric charges, affect solar neutrino scattering data and derives new constraints from recent dark matter detector experiments.

Contribution

It provides the first constraints on neutrino electromagnetic properties based on coherent elastic neutrino-nucleus scattering data from solar neutrinos.

Findings

Constraints on neutrino magnetic moments from XENONnT and PandaX-4T data.

Limits on neutrino electric charges derived from recent experiments.

Implications for active-sterile transition magnetic moments in solar neutrino interactions.

Abstract

Despite being neutral particles, neutrinos can acquire non-zero electromagnetic properties from radiative corrections that can be induced by the presence of new physics. Electromagnetic neutrino processes induce spectral distortions in neutrino scattering data, which are especially visible at experiments characterized by low recoil thresholds. We investigate how neutrino electromagnetic properties confront the recent indication of coherent elastic neutrino-nucleus scattering (CE$\nu$NS) from $^8$B solar neutrinos in dark matter direct detection experiments. We focus on three possibilities: neutrino magnetic moments, neutrino electric charges, and the active-sterile transition magnetic moment portal. We analyze recent XENONnT and PandaX-4T data and infer the first \cevns-based constraints on electromagnetic properties using solar $^8$B neutrinos.