Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-11-23
Phys.Rev.D81:085027,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
28 pages, 14 figures
Scientific paper
10.1103/PhysRevD.81.085027
In the baryogenesis via leptogenesis scenario the self-energy contribution to the CP-violating parameter plays a very important role. Here, we calculate it in a simple toy model of leptogenesis using the Schwinger-Keldysh/Kadanoff-Baym formalism as starting point. We show that the formalism is free of the double-counting problem typical for the canonical Boltzmann approach. Within the toy model, medium effects increase the CP-violating parameter. In contrast to results obtained earlier in the framework of thermal field theory, the medium corrections are linear in the particle number densities. In the resonant regime quantum corrections lead to modified expressions for the CP-violating parameter and for the decay width. Most notably, in the maximal resonant regime the Boltzmann picture breaks down and an analysis in the full Kadanoff-Baym formalism is required.
Garny Mathias
Hohenegger Andreas
Kartavtsev Alexander
Lindner Manfred
No associations
LandOfFree
Systematic approach to leptogenesis in nonequilibrium QFT: self-energy contribution to the CP-violating parameter does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Systematic approach to leptogenesis in nonequilibrium QFT: self-energy contribution to the CP-violating parameter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systematic approach to leptogenesis in nonequilibrium QFT: self-energy contribution to the CP-violating parameter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-172544