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

• Mohammed Boukidi (Cadi Ayyad University, Marrakech)

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.

Complex S3-symmetric 3HDM

• Anton Kunčinas (CFTP/IST, U. Lisboa)

Distinguishing P-violation and C-violation in CP-violating extended Higgs sectors.

• Venus Keus (Dublin Institute for Advanced Studies (DIAS))

I will review CP-violation in 2HDMs and 3HDMs, discuss the nature of the CP-violation therein and show their experimental probes, including flavour observables, such as (g-2)_mu, undoubtable current and future collider observables, and their cosmological implications for Dark Matter, Baryogenesis and inflation.

Discussion