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Published October 30, 2014 | Submitted + Published
Journal Article Open

Electroweak baryogenesis, electric dipole moments, and Higgs diphoton decays


We study the viability of electroweak baryogenesis in a two Higgs doublet model scenario augmented by vector-like, electroweakly interacting fermions. Considering a limited, but illustrative region of the model parameter space, we obtain the observed cosmic baryon asymmetry while satisfying present constraints from the non-observation of the permanent electric dipole moment (EDM) of the electron and the combined ATLAS and CMS result for the Higgs boson diphoton decay rate. The observation of a non-zero electron EDM in a next generation experiment and/or the observation of an excess (over the Standard Model) of Higgs to diphoton events with the 14 TeV LHC run or a future e^+e^− collider would be consistent with generation of the observed baryon asymmetry in this scenario.

Additional Information

© 2014 The Authors. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. Published for SISSA by Springer. Article funded by SCOAP3. Received: August 15, 2014; Accepted: October 10, 2014; Published: October 30, 2014. We thank W. Marciano for suggesting this study and V. Cirigliano and Y. Zhang for useful discussions and comments on the manuscript. This work was supported in part by U.S. Department of Energy contract DE-SC0011095 (MJRM and WCHAO) and in part by the National Science Foundation under Grant No. NSF PHY11-25915 (MJRM). The authors also thank the Kavli Institute for Theoretical Physics, where a portion of this work was completed.

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Published - art_10.1007_JHEP10_2014_180.pdf

Submitted - 1406.0517v1.pdf


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