Singlet-Catalyzed Electroweak Phase Transitions in the 100 TeV Frontier

• Published in: arXiv.org 2016-05
• Main Authors: Kotwal, Ashutosh V, Ramsey-Musolf, Michael J, Jose Miguel No, Winslow, Peter
• Format: Article
• Language: English
• Subjects: Benchmarks; Large Hadron Collider; Luminosity; Parameter identification; Phase transitions
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1605.06123

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. We find that any of these future collider scenarios could significantly extend the reach beyond that of the high luminosity LHC, and that with \(\sqrt{s}\) = 100 TeV (200 TeV) and 30 ab\(^{-1}\), the full region of parameter space favorable to strong first order electroweak phase transitions is almost fully (fully) discoverable.