The Higgs Seesaw Induced Neutrino Masses and Dark Matter

TL;DR

This paper presents a model extending the Standard Model with a new U(1)' symmetry to explain neutrino masses via a seesaw mechanism and proposes a stable fermion as a dark matter candidate, consistent with current constraints.

Contribution

It introduces a novel inverse seesaw mechanism within a U(1)' extended Standard Model that links neutrino mass generation with dark matter stability.

Findings

Active neutrino masses generated via modified inverse seesaw.

Stable fermion singlet as a viable dark matter candidate.

Parameter space consistent with relic abundance and detection constraints.

Abstract

In this paper we propose a possible explanation of the active neutrino Majorana masses with the TeV scale new physics which also provide a dark matter candidate. We extend the Standard Model (SM) with a local U(1)' symmetry and introduce a seesaw relation for the vacuum expectation values (VEVs) of the exotic scalar singlets, which break the U(1)' spontaneously. The larger VEV is responsible for generating the Dirac mass term of the heavy neutrinos, while the smaller for the Majorana mass term. As a result active neutrino masses are generated via the modified inverse seesaw mechanism. The lightest of the new fermion singlets, which are introduced to cancel the U(1)' anomalies, can be a stable particle with ultra flavor symmetry and thus a plausible dark matter candidate. We explore the parameter space with constraints from the dark matter relic abundance and dark matter direct detection.