Cosmological CPT Violation, Baryon/Leptogenesis and CMB Polarization

Details Cosmological CPT Violation, Baryon/Leptogenesis and CMB Polarization Cosmological CPT Violation, Baryon/Leptogenesis and CMB Polarization

2006-11-14

arxiv.org/abs/hep-ph/0611192v2

Phys.Lett.B651:357-362,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

The version appears in PLB

Scientific paper

10.1016/j.physletb.2007.06.050

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.

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