Low Energy Constraints From Absolute Neutrino Mass Observables and Lepton Flavor Violation in Left-Right Symmetric Model

TL;DR

This paper explores the relationships among neutrino mass observables and lepton flavor violation within a left-right symmetric model, identifying parameter space constraints and potential experimental tests.

Contribution

It provides a comprehensive analysis of neutrino mass observables and lepton flavor violation constraints in the minimal left-right symmetric model, considering both type-I and type-II seesaw dominance.

Findings

Constraints from lepton flavor violation restrict heavy particle masses.

Certain parameter regions are ruled out by combined experimental bounds.

Future experiments can probe the remaining allowed parameter space.

Abstract

We have studied the correlations among the three absolute neutrino mass observables - the effective Majorana mass ($m_{ee}$) which can be obtained from neutrinoless double beta decay, the electron neutrino mass ($m_{\beta}$) which is measured in single beta decay experiments and the sum of the light neutrino masses ($\Sigma$) which is constrained from cosmological observations, in the context of minimal left-right symmetric model. Two phenomenologically interesting cases of type-I seesaw dominance as well as type-II seesaw dominance have been considered. We have taken into account the independent constraints coming from lepton flavor violation, single $\beta$ decay, cosmology and neutrinoless double beta decay and have determined the combined allowed parameter space that can be probed in the future experiments. We have also analyzed the correlations and tensions between the different mass variables. In addition, the constraints on the masses of the heavy particles coming from lepton flavor violation and the bounds on three absolute neutrino mass observables are also determined. We show that these constraints can rule out some of the parameter space which are not probed by the collider experiments.