Unique Probe of Neutrino Electromagnetic Moments with Radiative Pair Emission

TL;DR

This paper proposes a novel atomic radiative emission method to precisely measure neutrino electromagnetic moments, enabling differentiation of magnetic and electric components, thus offering new insights into neutrino properties and physics beyond the Standard Model.

Contribution

It introduces a unique approach using atomic radiative emission of neutrino pairs to distinguish and measure neutrino electromagnetic moments, surpassing previous constraints.

Findings

Projected sensitivities for detecting neutrino electromagnetic moments.

Method can separate magnetic and electric moments.

Potential to identify individual elements of neutrino electromagnetic moments.

Abstract

The neutrino magnetic and electric moments are zero at tree level but can arise in radiative corrections. Any deviation from the Standard Model prediction would provide another indication of neutrino-related new physics in addition to the neutrino oscillation and masses. Especially, Dirac and Majorana neutrinos have quite different structures in their electromagnetic moments. Nevertheless, the recoil measurements and astrophysical stellar cooling can only constrain combinations of neutrino magnetic and electric moments with the limitation of not seeing their detailed structures. We propose using the atomic radiative emission of neutrino pair to serve as a unique probe of the neutrino electromagnetic moments with the advantage of not just separating the magnetic and electric moments but also identifying their individual elements. Both searching strategy and projected sensitivities are illustrated in this letter.