Dileptonic Scalar Dark Matter and Exotic Leptons

TL;DR

This paper proposes a model where a neutral scalar triplet with lepton number conservation acts as long-lived dark matter, decaying into neutrinos, with exotic leptons contributing to neutrino mass generation.

Contribution

It introduces a novel scenario of long-lived scalar dark matter with lepton number conservation and explores the role of exotic leptons in neutrino mass generation.

Findings

Neutral scalar triplet with L=2 as dark matter candidate

Exotic leptons with L=-1 facilitate neutrino mass generation

Dark matter decays into neutrinos, consistent with long-lived nature

Abstract

A simple scenario of long-lived dark matter is presented. Assuming lepton number $(L)$ conservation with Dirac neutrinos, the neutral component of an $SU(2)_L$ scalar triplet with $L=2$ is a suitable candidate, which decays to two neutrinos. Exotic leptons with $L=-1$ may also play a role, and act as anchors for small seesaw Dirac neutrino masses.