New Ways to Soft Leptogenesis
Soft supersymmetry breaking terms involving heavy singlet sneutrinos provide new sources of lepton number violation and of CP violation. In addition to the CP violation in mixing, investigated previously, we find that ''soft leptogenesis'' can be generated by CP violation in decay and in the interference of mixing and decay. These additional ways to leptogenesis can be significant for a singlet neutrino Majorana mass that is not much larger than the supersymmetry breaking scale, M {approx}< 10{sup 2}m{sub SUSY}. In contrast to CP violation in mixing, for some of these new contributions the sneutrino oscillation rate can be much faster than the decay rate, so that the bilinear scalar term need not be smaller than its natural scale.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 827317
- Report Number(s):
- SLAC-PUB-10519; TRN: US0403244
- Resource Relation:
- Other Information: PBD: 6 Jul 2004
- Country of Publication:
- United States
- Language:
- English
Similar Records
New ways to leptogenesis with gauged
Susy seesaw inflation and NMSO(10)GUT