The next challenge for neutrinos: the mass ordering

TL;DR

This paper discusses the challenges in determining the neutrino mass ordering and CP violation phase, highlighting recent statistical methods and the importance of these measurements for new physics beyond the Standard Model.

Contribution

It introduces a new statistical method to reliably determine the neutrino mass ordering, addressing a key unresolved issue in neutrino physics.

Findings

New statistical method improves reliability of mass ordering determination

Highlights the correlation between mass ordering and CP violation phase

Emphasizes the importance of these measurements for understanding physics beyond the Standard Model

Abstract

Neutrino physics is nowadays receiving more and more attention as a possible source of information for the long--standing investigation of new physics beyond the Standard Model. This is also supported by the recent change of perspectives in neutrino researches since the discovery period is almost over and we are entering the phase of precise measurements. Despite the limited statistics collected for some variables, the three--flavour neutrino framework seems well strengthening. However some relevant pieces of this framework are still missing. The amount of a possible CP violation phase and the mass ordering are among the most challenging and probably those that will be known in the near future. In this paper we will discuss these two correlated issues and a very recent new statistical method introduced to get reliable results on the mass ordering.