Cosmological CPT-violation, baryo/leptogenesis and CMB polarization
Abstract
In this Letter we study the cosmological CPT-violation and its implications in baryo/leptogenesis and CMB polarization. We propose specifically a variant of the models of gravitational leptogenesis. By performing a global analysis with the Markov Chain Monte Carlo (MCMC) method, we find the current CMB polarization observations from the three-year WMAP (WMAP3) and the 2003 flight of BOOMERANG (B03) data provide a weak evidence for our model. However to verify and especially exclude this type of mechanism for baryo/leptogenesis with cosmological CPT-violation, the future measurements on CMB polarization from PLANCK and CMBpol are necessary.
- Publication:
-
Physics Letters B
- Pub Date:
- August 2007
- DOI:
- 10.1016/j.physletb.2007.06.050
- arXiv:
- arXiv:hep-ph/0611192
- Bibcode:
- 2007PhLB..651..357L
- Keywords:
-
- 98.80.Es;
- 98.80.Cq;
- Observational cosmology;
- Particle-theory and field-theory models of the early Universe;
- High Energy Physics - Phenomenology;
- Astrophysics;
- High Energy Physics - Theory
- E-Print:
- 8 pages, 2 figures