One of the most efficient mechanisms for producing the baryon asymmetry of the Universe is the decay of scalar condensates in a SUSY GUT as was first suggested by Affleck and Dine. We show that given a large enough asymmetry, the baryon number will be preserved down to low temperatures even if B - L = 0, because the baryon number carrying scalars from Bose condensates that give the W a mass. We derive the conditions on the condensate needed to suppress electroweak sphaleron interactions which would otherwise drive the baryon asymmetry to zero when B - L = 0.
Bibliographical noteFunding Information:
This work was supported in part by DoE grants DE-FG02-94ER-40823 and DE-AC03-76SF00098, by NSF grant AST-91-20005 and by NSERC.
We would like to thank Bruce Campbell and John March-Russell for useful discussions. This work was supported in part by the Director, Office of Energy Research, Office of High Energy and Nuclear Physics, Division of High Energy Physics of the U.S. Department of Energy under Contracts DE-FG02-94ER-40823 and DE-AC03-76SF00098, by NSF grant AST-91-20005 and by NSERC. The work of K.A.O. was in addition supported by a Presidential Young Investigator Award.