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Scientific article
English

Quantum Boltzmann equations and leptogenesis

Published inJournal of cosmology and astroparticle physics, vol. 2007, no. 08, p. 002-002
Publication date2007
Abstract

The closed time-path formalism is a powerful Green's function formulation to describe non-equilibrium phenomena in field theory and it leads to a complete non-equilibrium quantum kinetic theory. We make use of this formalism to write down the set of quantum Boltzmann equations relevant for leptogenesis. They manifest memory effects and off-shell corrections. In particular, memory effects lead to a time-dependent CP asymmetry whose value at a given instant of time depends upon the previous history of the system. This result is particularly relevant when the asymmetry is generated by the decays of nearly mass-degenerate heavy states, as in resonant or soft leptogenesis.

Keywords
  • Baryon asymmetry
  • Cosmology of theories beyond the SM
Citation (ISO format)
DE SIMONE, Andrea, RIOTTO, Antonio Walter. Quantum Boltzmann equations and leptogenesis. In: Journal of cosmology and astroparticle physics, 2007, vol. 2007, n° 08, p. 002–002. doi: 10.1088/1475-7516/2007/08/002
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Article (Published version)
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ISSN of the journal1475-7516
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