Is neutrino produced in standard weak interactions a Dirac or Majorana particle?

TL;DR

This paper argues that standard weak interactions produce only Dirac neutrinos, while Majorana neutrinos require a different, yet undiscovered interaction, emphasizing the importance of high-precision experiments to detect neutrinoless double decay.

Contribution

It establishes that standard weak interactions produce only Dirac neutrinos, highlighting the need for new interactions to produce Majorana neutrinos.

Findings

Only Dirac neutrinos are produced in standard weak interactions.

Majorana neutrinos require a different interaction that differentiates spin projections.

Detecting neutrinoless double decay is crucial for identifying Majorana neutrinos.

Abstract

This work considers the following problem: what type (Dirac or Majorana) of neutrinos is produced in standard weak interactions? It is concluded that only Dirac neutrinos but not Majorana neutrinos can be produced in these interactions. It means that this neutrino will be produced in another type of interaction. Namely, Majorana neutrino will be produced in the interaction which differentiates spin projections but cannot differentiate neutrino (particle) from antineutrino (antiparticle). This interaction has not been discovered yet. Therefore experiments with very high precision are important to detect the neutrinoless double decay.