# A Two Higgs Doublet Model for Dark Matter and Neutrino Masses

## TL;DR

This paper proposes an extended Two Higgs Doublet Model that explains dark matter stability, neutrino masses, and flavor conservation by gauging baryon and lepton numbers, and analyzes its experimental viability.

## Contribution

It introduces a novel 2HDM extension with gauged baryon and lepton numbers, incorporating a vector-like fermion as dark matter and addressing neutrino masses via the type I seesaw.

## Key findings

- Identifies parameter space consistent with current collider and detection limits.
- Calculates dark matter relic density and scattering cross sections.
- Demonstrates compatibility with thermal and non-thermal dark matter production.

## Abstract

Motivated by the interesting features of Two Higgs Doublet Models (2HDM) we present a 2HDM extension where the stability of dark matter, neutrino masses and the absence of flavor changing interactions are explained by promoting baryon and lepton number to gauge symmetries. Neutrino masses are addressed within the usual type I seesaw mechanism. A vector-like fermion acts as dark matter and it interacts with Standard Model particles via the kinetic and mass mixings between the neutral gauge bosons. We compute the relevant observables such as the dark matter relic density and spin-independent scattering cross section to outline the region of parameter space that obeys current and projected limits from collider and direct detection experiments via thermal and non-thermal dark matter production.