Interference Effects for $0\nu\beta\beta$ Decay in the Left-Right Symmetric Model

TL;DR

This paper investigates how different mechanisms interfere in neutrinoless double beta decay within the left-right symmetric model, quantifying their contributions and variations across various nuclei and decay energies.

Contribution

It provides a detailed numerical analysis of interference effects among mechanisms in neutrinoless double beta decay, highlighting the significance of certain interference terms.

Findings

Most interference contributions are below 20% for studied nuclei.

Interference between mass mechanisms and η mechanism ranges from 30% to 50%.

Interference effects vary with the decay Q-value.

Abstract

Various mechanisms may contribute to neutrinoless double beta decay in the left-right symmetric model. The interference between these mechanisms also contribute to the overall decay rate. The analysis of the contributions of these interference terms is important for disentangling different mechanisms. In the present paper we study interference effects contributing to the decay rate for neutrinoless double-$\beta$ decay in the left-right symmetric model. The numerical values for maximum interference for several nuclides are calculated. It is observed that, for most of the interference terms, the contribution is smaller than 20$\%$ for all the nuclei considered in the study. However, the interference between the mass mechanisms (light and heavy) and $\eta$ mechanism is observed to be in the range 30$\%$-50$\%$. The variation of the interference effect with the $Q$ values is also studied.