| Full text | |
| Author(s): |
Nishi, Celso C.
;
Fong, Chee Sheng
Total Authors: 2
|
| Document type: | Journal article |
| Source: | Journal of High Energy Physics; v. N/A, n. 7, p. 33-pg., 2020-07-21. |
| Abstract | |
We formulate three-flavor type-I leptogenesis in the mu tau basis which is convenient because in the three-flavor regime, both mu and tau charged lepton Yukawa interactions are in thermal equilibrium and the thermal bath is symmetric under the exchange mu <-> tau. We apply this formalism to models with mu tau-reflection CP mu tau symmetry. We confirm the previous result that leptogenesis fails in the three-flavor regime with exact CP mu tau symmetry. Allowing CP mu tau symmetry to be broken to various degrees, we show that leptogenesis can be successful in the three-flavor regime only in certain tuned parameter space, which could further imply additional symmetry is at play. As a bonus, we derive analytical expressions which could be utilized whenever the branching ratios for the decays to mu and tau flavors are equal or approximately so. (AU) | |
| FAPESP's process: | 19/11197-6 - Precision test of baryogenesis |
| Grantee: | Chee Sheng Fong |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 14/19164-6 - Challenges in the 21st century in neutrino physics and astrophysics |
| Grantee: | Orlando Luis Goulart Peres |
| Support Opportunities: | Special Projects |