Speaker
Description
We investigate the Type-I Two-Higgs-Doublet Model (2HDM-I) as a potential explanation for the 95 GeV diphoton excess observed at the LHC, and assess the feasibility of discovering a 95 GeV Higgs boson at future hadron colliders. Our analysis shows that the direct Higgs search data strongly constrain the Higgs-mixing angle parameter. Subsequent collider simulations focus on the $pp \to t(\to W^+b)\bar{t}(\to W^-\bar{b})h(\to \gamma\gamma)$ process and its relevant backgrounds on HL-LHC, HE-LHC and FCC-hh. For different colliders, statistical significances of $2\sigma$ and $5\sigma$ can be achieved at different integrated luminosity. At the HL-LHC, certain samples can achieve a significance of $5\sigma$ with an integrated luminosity of $L=706\ \text{fb}^{-1}$.
