Probing Seesaw with Parity Restoration

TL;DR

This paper proposes a new method to test the seesaw mechanism for neutrino mass within the Left-Right Symmetric Model by linking scalar interactions to neutrino Yukawa couplings, simplifying experimental analysis.

Contribution

It introduces a novel approach connecting leptonic scalar interactions to neutrino Yukawa couplings, facilitating experimental tests of the seesaw origin of neutrino mass.

Findings

The method relates scalar interactions to Yukawa couplings via hermitian parts.

It simplifies the determination of neutrino Yukawa couplings in experiments.

Provides a new testable prediction for neutrino mass models.

Abstract

We present a novel way of testing the seesaw origin of neutrino mass in the context of the minimal Left-Right Symmetric Model. It is based on the connection between the leptonic interactions of the doubly charged scalars, whose presence is at the core of the seesaw mechanism, and the neutrino Dirac Yukawa couplings which govern, among other processes, the right-handed neutrino decays into left-handed charged leptons. We prove that any physical quantity depending on these couplings is a function of the hermitian part only which can significantly simplify their future experimental determination.