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Bubble baryogenesis

Cheung, Clifford and Dahlen, Alex and Elor, Gilly (2012) Bubble baryogenesis. Journal of High Energy Physics, 2012 (9). Art. No. 73. ISSN 1029-8479. doi:10.1007/jhep09(2012)073.

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We propose an alternative mechanism of baryogenesis in which a scalar baryon undergoes a percolating first-order phase transition in the early Universe. The potential barrier that divides the phases contains explicit B and CP violation and the corresponding instanton that mediates decay is therefore asymmetric. The nucleation and growth of these asymmetric bubbles dynamically generates baryons, which thermalize after percolation; bubble collision dynamics can also add to the asymmetry yield. We present an explicit toy model that undergoes bubble baryogenesis, and numerically study the evolution of the baryon asymmetry through bubble nucleation and growth, bubble collisions, and washout. We discuss more realistic constructions, in which the scalar baryon and its potential arise amongst the color-breaking minima of the MSSM, or in the supersymmetric neutrino seesaw mechanism. Phenomenological consequences, such as gravitational waves, and possible applications to asymmetric dark-matter generation are also discussed.

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Additional Information:© SISSA, Trieste, Italy 2012. JHEP is an open-access journal funded by SCOAP3 and licensed under CC BY 4.0. Received: June 23, 2012. Revised: August 7, 2012. Accepted: August 18, 2012. Published: September 19, 2012. Thanks to Mustafa Amin, and Paul Steinhardt. C. C. is supported by the Director, Office of Science, Office of High Energy and Nuclear Physics, of the US Department of Energy under Contract DE-AC02-05CH11231, and by the National Science Foundation under grant PHY-0855653. A. D. is supported by the Berkeley Center for Theoretical Physics, department of physics at UC Berkeley and in part by NSF, under contract 32602-13067-44.
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC02-05CH11231
University of California, BerkeleyUNSPECIFIED
Subject Keywords:Beyond Standard Model, Cosmology of Theories beyond the SM, Nonperturbative Effects, Supersymmetric Effective Theories
Issue or Number:9
Record Number:CaltechAUTHORS:20190619-094157554
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Official Citation:Cheung, C., Dahlen, A. & Elor, G. J. High Energ. Phys. (2012) 2012: 73.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96525
Deposited By: George Porter
Deposited On:20 Jun 2019 14:54
Last Modified:16 Nov 2021 17:21

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