Electromagnetic transitions from isobaric analogue states to study nuclear matrix elements for double beta decays and astro-neutrino inverse beta decays

TL;DR

This paper explores experimental methods to measure electromagnetic transitions from isobaric analogue states to determine nuclear matrix elements, aiding theoretical models for double beta decays and astro-neutrino inverse beta decays.

Contribution

It introduces the first experimental approach to study NMEs via gamma transitions from IASs, providing data to improve theoretical calculations.

Findings

Estimated gamma cross sections demonstrate experimental feasibility.

Event rate calculations support potential for future measurements.

First experimental insights into NMEs for DBDs and IBDs.

Abstract

Experimental studies for nuclear matrix elements (NMEs) for neutrinoless double beta decays (DBDs) and astro-neutrino inverse beta decays (IBDs) are crucial for neutrino studies beyond the standard model and the astro neutrino reactions since theoretical model calculations for the NMEs are hard due to the high sensitivities of the NMEs to the models. The NMEs associated with DBDs and IBDs are found for the first time to be studied experimentally by measuring electro-magnetic (gamma) transitions from isobalic analogue states (IASs) of the DBD and IBD nuclei. They are used to help the theoretical model calculations for them. The IAS gamma cross sections and the event rates are estimated to show the feasibility of the experiments.