Singlet-catalyzed electroweak phase transitions in the 100 Te V frontier
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 bbγγ and 4τ 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 √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 √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.
Additional Information© 2016 American Physical Society. Received 28 June 2016; published 23 August 2016. The work of A. V. K. was supported by the Fermi National Accelerator Laboratory. Fermilab is operated by Fermi Research Alliance, LLC, under Contract No. DE-AC02-07CH11359 with the United States Department of Energy. The work of M. J. R. M. and P.W. was supported in part by U.S. Department of Energy Contract No. DE-SC0011095 and by the National Science Foundation under Grant No. NSF PHY11-25915. J. M. N. is supported by the People Programme (Marie Curie Actions) of the European Union Seventh Framework Programme (FP7/2007-2013) under REA grant agreement PIEF-GA-2013-625809.
Published - PhysRevD.94.035022.pdf
Submitted - 1605.06123v1.pdf