Superposition of CP-Even and CP-Odd Higgs Resonances: Explaining the 95 GeV Excesses within a Two-Higgs Doublet Model

TL;DR

This paper proposes a model where superimposed CP-even and CP-odd Higgs bosons within a Two-Higgs Doublet Model explain multiple observed excesses around 95 GeV in collider data, aligning with experimental findings.

Contribution

It introduces a novel explanation using superposed Higgs states in a 2HDM to account for multiple collider excesses at 95 GeV, consistent with constraints.

Findings

Successfully explains CMS and ATLAS excesses at 95 GeV

Achieves explanation within 1σ confidence level

Maintains consistency with theoretical and experimental constraints

Abstract

We propose an explanation for the observed excesses around 95 GeV in the di-photon and di-tau invariant mass distributions, as reported by the CMS collaboration at the Large Hadron Collider (LHC). These findings are complemented by a long-standing discrepancy in the $b\bar{b}$ invariant mass at the Large Electron-Positron (LEP) Collider. Additionally, the ATLAS collaboration has reported a corroborative excess in the di-photon final state within the same mass range, albeit with slightly lower significance. Our approach involves the superposition of CP-even and CP-odd Higgs bosons within the Type-III Two-Higgs Doublet Model (2HDM) to simultaneously explain these excesses at 1$\sigma$ Confidence Level (C.L.), while remaining consistent with current theoretical and experimental constraints.