Investigating the 95 GeV Higgs Boson Excesses within the I(1+2)HDM

TL;DR

This paper investigates whether an extended 2-Higgs Doublet Model can explain observed 95 GeV Higgs-like excesses at the LHC, aligning with previous LEP data, by analyzing theoretical and experimental constraints.

Contribution

It introduces an inert doublet extension to the 2HDM Type-I to explain the 95 GeV Higgs excesses observed at colliders.

Findings

A light CP-even Higgs around 95 GeV can explain LHC excesses.

Model parameters consistent with experimental bounds.

Alignment with LEP $b\bar{b}$ excesses.

Abstract

In this work, we explore how the 2-Higgs Doublet Model (2HDM) Type-I, extended by an inert doublet, can provide an explanation for the recently observed excesses at the Large Hadron Collider (LHC) in the $\gamma\gamma$ and $\tau^+ \tau^- $ final states. Hence, by imposing theoretical constraints and experimental bounds on the model parameter space, our findings show that a light CP-even Higgs boson, $h$, with a mass around 95 GeV, can account for these anomalies. This result aligns with the excess in $b\bar b$ signatures reported in earlier data from the Large Electron-Positron (LEP) collider.