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Quantum Boltzmann equations and leptogenesis

De Simone, Andrea
Published in Journal of Cosmology and Astroparticle Physics. 2007, vol. 2007, no. 08, p. 002-002
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 asymmetryCosmology of theories beyond the SM
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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. https://archive-ouverte.unige.ch/unige:36498

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Deposited on : 2014-05-12

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