Flavoured Leptogenesis in the CTP Formalism

Abstract

Within the Closed Time Path (CTP) framework, we derive kinetic equations for particle distribution functions that describe leptogenesis in the presence of several lepton flavours. These flavours have different Standard-Model Yukawa couplings, which induce flavour-sensitive scattering processes and thermal dispersion relations. Kinetic equilibrium, which is rapidly established and maintained via gauge interactions, allows to simplify these equations to kinetic equations for the matrix of lepton charge densities. In performing this simplification, we notice that the rapid flavour-blind gauge interactions damp the flavour oscillations of the leptons. Leptogenesis turns out to be in the parametric regime where the flavour oscillations are overdamped and flavour decoherence is mainly induced by flavour sensitive scatterings. We solve the kinetic equations for the lepton number densities numerically and show that they interpolate between the unflavoured and the fully flavoured regimes within the intermediate parametric region, where neither of these limits is applicable.

arXiv comment44 pages, 8 figures

References in corpus (24)

• Towards a complete theory of thermal leptogenesis in the SM and MSSM
• Transport coefficients in high temperature gauge theories: (I) Leading-log results
• The importance of flavor in leptogenesis
• Flavour Issues in Leptogenesis
• Electroweak-Scale Resonant Leptogenesis
• Non-local Electroweak Baryogenesis Part I : Thin Wall Regime
• Primordial Lepton Family Asymmtries in Seesaw Model
• Transport equations for chiral fermions to order \hbar and electroweak baryogenesis: Part I
• Transport equations for chiral fermions to order \hbar and electroweak baryogenesis: Part II
• MSSM Electroweak Baryogenesis and Flavour Mixing in Transport Equations
• Quantum mechanics of baryogenesis
• Spectator processes and baryogenesis
• Finite Number Density Corrections to Leptogenesis
• Quantum Boltzmann Equations and Leptogenesis
• On Higgs and sphaleron effects during the leptogenesis era
• Systematic approach to leptogenesis in nonequilibrium QFT: vertex contribution to the CP-violating parameter
• Leptogenesis from Quantum Interference in a Thermal Bath
• On the Impact of Flavour Oscillations in Leptogenesis
• Quantum Zeno effect and the impact of flavor in leptogenesis
• Flavored Quantum Boltzmann Equations
• Kinetic description of fermion flavor mixing and CP-violating sources for baryogenesis
• Systematic approach to leptogenesis in nonequilibrium QFT: self-energy contribution to the CP-violating parameter
• Quantum corrections to leptogenesis from the gradient expansion
• Separation of Equilibration Time-Scales in the Gradient Expansion

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