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Published May 29, 2012 | Published
Journal Article Open

Electroweak Beautygenesis: From b → s CP Violation to the Cosmic Baryon Asymmetry


We address the possibility that CP violation in B_s-B̅_s mixing may help explain the origin of the cosmic baryon asymmetry. We propose a new baryogenesis mechanism—"electroweak beautygenesis"—explicitly showing that these two CP-violating phenomena can be sourced by a common CP phase. As an illustration, we work in the two-Higgs-doublet model. Because the relevant CP phase is flavor off diagonal, this mechanism is less severely constrained by null results of electric dipole moment searches than other scenarios. We show how measurements of flavor observables by the D0, CDF, and LHCb collaborations test this scenario.

Additional Information

© 2012 American Physical Society. Received 3 December 2011; published 29 May 2012. We thank V. Cirigliano, J. Cline, S. Gori, C. Lee, S. Tulin, and C.Wagner for helpful discussions; P. Draper for collaboration at the early stages of this project; and the Shanghai Jiao Tong University where part of this work was carried out. We are grateful to S. Tulin for pointing out an error in an earlier version of this work and for a critical reading of this manuscript. The work is partially supported by U.S. Department of Energy contracts DE-FG02-91ER40618 (T. L.) and DE-FG02-08ER41531 (MJRM); the Wisconsin Alumni Research Foundation (MJRM); and the World Premier International Research Center Initiative (WPI initiative) MEXT, Japan (J. S.), Grant-in-Aid for scientific research (Young Scientists (B) 21740169) from Japan Society for Promotion of Science (J. S.) and the ERC Advanced Grant no. 267985 DaMESyFla (J. S.)

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