We investigate the production of charged scalar boson pairs $H^{-}{H}^{+}$ via photon-photon fusion in proton-proton collisions at the High-Luminosity LHC (HL-LHC), High-Energy LHC (HE-LHC), and Future Circular hadron-hadron Collider (FCC-hh). The analysis is performed within the framework of the Two-Higgs-Doublet Model type-III, which predicts large branching ratios for the decay channel $H^{\pm }\to {\tau }^{\pm }{\nu }_{\tau }$, the focus of this work. Motivated by the current excess of events in $\mathcal{B}\mathcal{R}(t\to H^{\pm }b)\times \mathcal{B}\mathcal{R}(H^{\pm }\to cb)$ for $M_{H^{\pm }}=130\mathrm{GeV}$, we explore charged Higgs boson masses in the range $M_{H^{\pm }}=100–150\mathrm{GeV}$. Using benchmark points (BPs) consistent with current experimental constraints, we evaluate the process $\gamma \gamma \to H^{-}{H}^{+}\to \tau {\nu }_{\tau }\tau {\nu }_{\tau }\to e\mu +{\cancel{E}}_T$ and find signal significances $\gtrsim 5\sigma$ across the entire mass range. For the most favored BP with $M_{H^{\pm }}=130\mathrm{GeV}$, we predict significances of $3\sigma$, $5\sigma$, $8\sigma$ with integrated luminosities of 3000, 2300, and $300{\mathrm{fb}}^{-1}$ at center-of-mass energies of 14 TeV (HL-LHC), 27 TeV (HE-LHC), and 100 TeV (FCC-hh), respectively.

Close

PrevNext

Reuse & PermissionsView figure in article

• 
• 
• 
• 
• 
• 
• 

• Extensions of Higgs sector
• Particle detection signatures
• Phenomenology