Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 3, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2009/03/008
Keywords
baryon asymmetry; physics of the early universe; cosmology of theories beyond the SM
Funding
- DJHC
- U. S. DOE Department of Energy [95ER40896, DE-FG02-08ER41531]
- Wisconsin Alumni Research Foundation
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In the context of many leptogenesis and baryogenesis scenarios, B - L (baryon minus the lepton number) is converted into B (baryon number) by non-perturbative B + L violating operators in the SU(2)(L) sector. We correct a common misconversion of B - L to B in the literature in the context of supersymmetry. More specifically, kinematic effects associated with the sparticle masses can be generically important (typically a factor of 2/3 correction in mSUGRA scenarios), and in some cases, it may even flip the sign between B - L and B. We give explicit formulae for converting B - L to B for temperatures approaching the electroweak phase transition temperature from above. Enhancements of B are also possible, leading to a mild relaxation of the reheating temperature bounds coming from gravitino constraints.
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