Constraints on neutrino millicharge and charge radius from neutrino-atom scattering

TL;DR

This paper investigates how neutrino electric charge and charge radius influence neutrino-atom interactions, deriving bounds from GEMMA and COHERENT experiments to constrain these properties.

Contribution

It provides new experimental bounds on neutrino millicharge and charge radius based on recent neutrino-atom scattering data.

Findings

Bounds on neutrino millicharge from GEMMA

Bounds on neutrino charge radius from COHERENT

Implications for neutrino electromagnetic properties

Abstract

We consider possible effects of neutrino electric charge (millicharge) and charge radius on the neutrino-atom interaction processes such as (i) atomic ionization by neutrino impact and (ii) coherent elastic neutrino-nucleus scattering. The bounds on the neutrino millicharge and charge radius that follow from, respectively, the GEMMA and COHERENT experiments are presented and discussed.