Dynamical CP Violation in the Early Universe

David London; K.R.S. Balaji; Robert H. Brandenberger; Tirthabir Biswas

Dynamical CP Violation in the Early Universe

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arxiv hep-ph/0403014 v3 pith:E7H75D3R submitted 2004-03-01 hep-ph astro-phgr-qchep-th

Dynamical CP Violation in the Early Universe

K.R.S. Balaji , Tirthabir Biswas , Robert H. Brandenberger , David London This is my paper

classification hep-ph astro-phgr-qchep-th

keywords universeviolationdynamicalearlyfieldsadditionalapproachasymmetrical

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Following earlier ideas of Dolgov, we show that the asymmetrical dynamical evolution of fields in the early Universe provides a new source for CP violation. This can lead to baryogenesis without any additional CP-violating interactions. The magnitude of this CP violation is time-dependent. In particular, it vanishes (or is very small) in the late Universe after the fields have relaxed (or are in their final approach) to their vacuum values. We provide an explicit example in which our mechanism is realized.

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Cited by 1 Pith paper

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Primordial Dirac Leptogenesis
hep-ph 2025-11 conditional novelty 7.0

Baryogenesis can proceed via CP-violating inflaton decays that imprint an asymmetry in an inert Higgs doublet, which decays into Dirac neutrinos and is converted by sphalerons to the observed baryon asymmetry.