# Higgs Boson Decays to Dark Photons through the Vectorized Lepton Portal

## TL;DR

This paper explores a new Higgs decay channel into dark photons mediated by vector-like fermions, analyzing its theoretical framework, decay rates, and detection prospects at colliders.

## Contribution

It introduces a minimal model connecting the Higgs to dark photons via vector-like fermions and evaluates its experimental signatures and constraints.

## Key findings

- Calculated Higgs decay rates to dark photons.
- Assessed collider detection prospects for these decays.
- Discussed extensions to non-Abelian dark sectors.

## Abstract

Vector-like fermions charged under both the Standard Model and a new dark gauge group arise in many theories of new physics. If these fermions include an electroweak doublet and singlet with equal dark charges, they can potentially connect to the Higgs field through a Yukawa coupling in analogy to the standard neutrino portal. With such a coupling, fermion loops generate exotic decays of the Higgs boson to one or more dark vector bosons. In this work we study a minimal realization of this scenario with an Abelian dark group. We investigate the potential new Higgs decays modes, we compute their rates, and we study the prospects for observing them at the Large Hadron Collider and beyond given the other experimental constraints on the theory. We also discuss extensions of the theory to non-Abelian dark groups.