Effective theory of Resonant Leptogenesis in the Closed-Time-Path approach

Björn Garbrecht, Matti Herranen

Research output: Contribution to journalArticlepeer-review

74 Scopus citations

Abstract

We describe mixing scalar particles and Majorana fermions using Closed-Time-Path methods. From the Kadanoff-Baym equations, we obtain the charge asymmetry, that is generated from decays and inverse decays of the mixing particles. Within one single formalism, we thereby treat Leptogenesis from oscillations and recover as well the standard results for the asymmetry in Resonant Leptogenesis, which apply when the oscillation frequency is much larger than the decay rate. Analytic solutions for two mixing neutral particles in a constant-temperature background illustrate our results qualitatively. We also perform the modification of the kinetic equations that is necessary in order to take account of the expansion of the Universe and the washout of the asymmetry.

Original languageEnglish
Pages (from-to)17-52
Number of pages36
JournalNuclear Physics, Section B
Volume861
Issue number1
DOIs
StatePublished - 1 Aug 2012
Externally publishedYes

Fingerprint

Dive into the research topics of 'Effective theory of Resonant Leptogenesis in the Closed-Time-Path approach'. Together they form a unique fingerprint.

Cite this