Dynamical CP violation in the early universe and leptogenesis

Journal Article · Thu Sep 01 00:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.056005· OSTI ID:20711499

Balaji, K R.S.; Biswas, Tirthabir ^[1]; Brandenberger, Robert H ^[1]; London, David ^[2]

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1. Department of Physics, McGill University, Montreal, Quebec, H3A 2T8 (Canada)
2. Laboratoire Rene J.-A. Levesque, Universite de Montreal, C.P. 6128, succ. centre-ville, Montreal, Quebec, H3C 3J7 (Canada)

In a recent publication, we suggested a mechanism for obtaining dynamical CP violation in the early universe based on the out-of-equilibrium evolution of complex scalar fields. In this paper, we suggest several ways of transferring the CP asymmetry from the scalar sector to the leptonic sector. In particular, we point out how a 'transient Maki-Nakagawa-Sakata (Pontecorvo) matrix' can generate an asymmetry between fermions and antifermions directly.

• OSTI ID: 20711499
• Journal Information: Physical Review. D, Particles Fields, Vol. 72, Issue 5; Other Information: DOI: 10.1103/PhysRevD.72.056005; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
COSMOLOGY
CP INVARIANCE
FERMIONS
PARTICLE PRODUCTION
QUANTUM FIELD THEORY
SCALAR FIELDS
UNIVERSE