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Published June 15, 2018 | Published + Submitted
Journal Article Open

Color breaking baryogenesis


We propose a scenario that generates the observed baryon asymmetry of the Universe through a multistep phase transition in which SU(3) color symmetry is first broken and then restored. A spontaneous violation of B−L conservation leads to a contribution to the baryon asymmetry that becomes negligible in the final phase. The baryon asymmetry is therefore produced exclusively through the electroweak mechanism in the intermediate phase. We illustrate this scenario with a simple model that reproduces the observed baryon asymmetry. We discuss how future electric dipole moment and collider searches may probe this scenario, though future electric dipole moment searches would require an improved sensitivity of several orders of magnitude.

Additional Information

© 2018 Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3. Received 11 September 2017; published 8 June 2018. We thank Lorenzo Sorbo for helpful discussions. G.W. would like to acknowledge that his contribution to this work was partly funded by both the American Australian Association via the Keith Murdoch fellowship as well the Australian Postgraduate Award (APA). M. J. R. M. and P.W. were supported in part under U.S. Department of Energy Contract No. DE-SC0011095.

Attached Files

Published - PhysRevD.97.123509.pdf

Submitted - 1708.07511.pdf


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