Singlet-Catalyzed Electroweak Phase Transitions in the 100 TeV Frontier

Understand

We study the prospects for probing a gauge singlet scalar-driven strong first order electroweak phase transition with a future proton-proton collider in the 100 TeV range.

• Singlet-Higgs mixing enables resonantly-enhanced di-Higgs production, potentially aiding discovery prospects.
• We perform Monte Carlo scans of the parameter space to identify regions associated with a strong first-order electroweak phase transition, analyze the corresponding di-Higgs signal, and select a set of benchmark points that span the range of di-Higgs signal strengths.
• For the $b\bar{b}\gamma\gamma$ and $4\tau$ final states, we investigate discovery prospects for each benchmark point for the high luminosity phase of the Large Hadron Collider and for a future $pp$ collider with $\sqrt{s}$ = 50, 100, or 200 TeV.