Abstract
We consider the evolution of baryon number B in the early universe under the influence of rapid sphaleron interactions and show that B will remain nonzero at all times even in the case of B - L = 0. This result arises due to thermal Yukawa interactions that cause nonidentical dispersion relations (thermal masses) for different lepton families. We point out the relevance of our result to the Affleck-Dine type baryogenesis.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 339-344 |
| Number of pages | 6 |
| Journal | Physics Letters B |
| Volume | 335 |
| Issue number | 3-4 |
| DOIs | |
| State | Published - Sep 8 1994 |
Bibliographical note
Funding Information:K.K. wishes to thank Jim Cline and S.D. wishes to thank H. Murayama and J. March-Russel for useful discussions. This research was supported by the DOE grant DE-FB02-94ER40823, by NSF grant AST 91-20005, by NSERC, KAO:s Presidential Young Investigator Award and by (K.K.) the Finnish Academy.