Electroweak scale neutrinos and decaying dark matter

TL;DR

This paper investigates a model where neutrinos at the electroweak scale interact with a lepton number violating scalar, analyzing its phenomenology and constraints from Majoron decay in the context of dark matter.

Contribution

It introduces a scalar model for electroweak scale neutrinos with lepton number violation and studies its phenomenology and dark matter implications.

Findings

Constraints on Majoron mass and width from decay scenarios

Viability of the model within experimental bounds

Parameter space restrictions for the scalar and Majoron

Abstract

We explore the scalar phenomenology of a model of electroweak scale neutrinos that incorporates the presence of a lepton number violating singlet scalar. An analysis of the pseudoscalar-Majoron field associated to this singlet field is carried out in order to verify the viability of the model and to restrict its parameter space. In particular we study the Majoron decay $J \to \nu \nu$ and use the bounds on the Majoron mass and width obtained in a modified Majoron Decaying Dark Matter scenario.