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Article Abstract
Density perturbations have recently been shown to lead to a novel effect in the freeze-out of heavy particles called "acoustically driven freeze-out." This leads to an enhancement in the yield in standard leptogenesis. We extend this calculation to include washout processes in type-I leptogenesis and the Sommerfeld-enhanced gauge annihilations in type-II and type-III leptogenesis. These CP conserving gauge annihilations suppress the yield of heavy particles sourcing the asymmetry. We show the acoustically driven freeze-out leads to novel enhancements in the baryon asymmetry in type-II and type-III leptogenesis, already in the weak washout regime, in contrast with type-I leptogenesis.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12078409 | PMC |
| http://dx.doi.org/10.1140/epjc/s10052-025-14277-9 | DOI Listing |
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