Stop-catalyzed baryogenesis beyond the MSSM
Nonminimal supersymmetric models that predict a tree-level Higgs mass above the minimal supersymmetric standard model (MSSM) bound are well motivated by naturalness considerations. Indirect constraints on the stop sector parameters of such models are significantly relaxed compared to the MSSM; in particular, both stops can have weak-scale masses. We revisit the stop-catalyzed electroweak baryogenesis (EWB) scenario in this context. We find that the LHC measurements of the Higgs boson production and decay rates already rule out the possibility of stop-catalyzed EWB. We also introduce a gauge-invariant analysis framework that may generalize to other scenarios in which interactions outside the gauge sector drive the electroweak phase transition.
Additional InformationPublished by the American Physical Society. This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. (Received 21 September 2015; published 19 November 2015) We are grateful to Roberto Franceschini, Michelangelo Mangano and Veronica Sanz for useful discussions. The work of A. K. was accomplished at the Aspen Center for Physics, which is supported by National Science Foundation grant PHY-1066293. The research of A. K. and M. J. R. M. was also supported by the Munich Institute for Astro- and Particle Physics (MIAPP) of the DFG cluster of excellence "Origin and Structure of the Universe". M. P. is supported by the U.S. National Science Foundation through Grant No. PHY-1316222. M. J. R. M. and P. W. were supported in part by U.S. Department of Energy Contract No. DE-SC0011095.
Published - PhysRevD.92.095019.pdf