On neutrino masses via CPT violating Higgs interaction in the Standard Model

TL;DR

This paper proposes a mechanism within the Standard Model where non-local Higgs interactions induce CPT violation, leading to neutrino-antineutrino mass splitting while preserving gauge symmetry.

Contribution

It introduces a novel CPT-violating Higgs interaction in the Standard Model that naturally explains neutrino-antineutrino mass differences without breaking gauge invariance.

Findings

Neutrino-antineutrino mass splitting achieved via non-local Higgs interactions.

CPT violation incorporated without spoiling gauge symmetry.

Mechanism compatible with Dirac-type neutrino masses.

Abstract

The Lorentz invariant $CPT$ violation by using non-local interactions is naturally incorporated in the Higgs coupling to neutrinos in the Standard Model, without spoiling the basic $SU(2)_{L}\times U(1)$ gauge symmetry. The neutrino--antineutrino mass splitting is thus realized by the mechanism which was proposed recently, assuming the neutrino masses to be predominantly Dirac-type in the Standard Model.