Sensitivities to neutrino electromagnetic properties at the TEXONO experiment

TL;DR

This paper explores how the TEXONO experiment can detect neutrino interactions and probe electromagnetic properties like magnetic moments and charge radius, improving sensitivity by an order of magnitude through realistic nuclear modeling.

Contribution

It demonstrates the potential of low-threshold Germanium detectors at TEXONO to enhance sensitivity to neutrino electromagnetic properties using advanced nuclear calculations.

Findings

Enhanced sensitivity to neutrino magnetic moment and charge radius.

Realistic nuclear structure calculations improve detection prospects.

Order of magnitude better sensitivities compared to previous studies.

Abstract

The possibility of measuring neutral-current coherent elastic neutrino-nucleus scattering (CENNS) at the TEXONO experiment has opened high expectations towards probing exotic neutrino properties. Focusing on low threshold Germanium-based targets with kg-scale mass, we find a remarkable efficiency not only for detecting CENNS events due to the weak interaction, but also for probing novel electromagnetic neutrino interactions. Specifically, we demonstrate that such experiments are complementary in performing precision Standard Model tests as well as in shedding light on sub-leading effects due to neutrino magnetic moment and neutrino charge radius. This work employs realistic nuclear structure calculations based on the quasi-particle random phase approximation (QRPA) and takes into consideration the crucial quenching effect corrections. Such a treatment, in conjunction with a simple statistical analysis, shows that the attainable sensitivities are improved by one order of magnitude as compared to previous studies.