Determining the Neutrino Mass Eigenstates and the effective Majorana Mass

TL;DR

This paper investigates key open questions in neutrino physics, including mass hierarchy, the nature of neutrinos, and the effective Majorana mass, using recent experimental data and analysis of mass splittings.

Contribution

It provides a comprehensive analysis of neutrino properties, emphasizing the importance of precise mass splitting definitions and favoring the normal mass hierarchy based on latest data.

Findings

Supports the normal neutrino mass hierarchy

Suggests neutrinos are likely not self-conjugate particles

Provides bounds on the absolute neutrino mass scale

Abstract

This paper aims at solving several open questions in current neutrino physics: the neutrino mass hierarchy, the Dirac CP-violating phase, the absolute mass of neutrinos, the nature of neutrinos (Dirac or Majorana), the Majorana matrix, and the absolute value of the effective Majorana neutrino mass. In the research presented in this paper, we have shown that the precise definition of the mass splittings between neutrino mass eigenstates, done in the latest analysis of experimental data, can be of crucial importance for defining the nature of neutrino mass hierarchy. The Standard Model has three generations of fundamental matter particles. Three generations of the charged lepton mass show a hierarchical structure. Owing to that, there is a belief and it is considered that neutrinos may follow such a hierarchical structure. In our calculations, we have also included the latest data obtained, based on the processing of measurement results, which showed that even with such data, obtained results favor the normal neutrino mass hierarchy. As for the individual neutrino mass calculated in this paper, in today's neutrino physics it is only known that the neutrino mass scale is bounded only from above, and both the Dirac and the Majorana character of neutrinos are compatible with all observations. Among some of the questions resolved in this paper, which are related to the properties of neutrinos, a positive answer was also given to the question of whether light neutrinos are self-conjugate particles or not.