Single Field Baryogenesis

Abstract

We propose a new variant of the Affleck-Dine baryogenesis mechanism in which a rolling scalar field couples directly to left- and right-handed neutrinos, generating a Dirac mass term through neutrino Yukawa interactions. In this setup, there are no explicitly CP violating couplings in the Lagrangian. The rolling scalar field is also taken to be uncharged under the $B-L$ quantum numbers. During the phase of rolling, scalar field decays generate a non-vanishing number density of left-handed neutrinos, which then induce a net baryon number density via electroweak sphaleron transitions.

4 pages, LaTex

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Cited by in corpus (11)

• Torsion Cosmology and the Accelerating Universe
• Scalar-field-dominated cosmology with a transient accelerating phase
• Deformed defects for scalar fields with polynomial interactions
• Cosmological dynamics with propagating Lorentz connection modes of spin zero
• Dynamic Scalar Torsion and an Oscillating Universe
• Affleck-Dine (Pseudo)-Dirac Neutrinogenesis
• Hybrid dark energy
• Dynamical CP Violation in the Early Universe and Leptogenesis
• Baryon Asymmetry, Inflation and Squeezed States
• Baryogenesis in Brans-Dicke theory
• Perturbative and Nonperturbative Contributions to a Simple Model for Baryogenesis