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Cosmological CPT Violation, Baryon/Leptogenesis and CMB Polarization
In this paper 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.Comment: The version appears in PL
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