Affleck Dine leptogenesis via multiple flat directions

Abstract

We investigate the Affleck-Dine mechanism when multiple flat directions have large values simultaneously. We consider in detail the case when both $L{H}_u$ and $H_u{H}_d$ flat directions are operative with a non-renormalizable superpotential. In case Hubble induced A-terms are present for these two flat directions, their initial values are determined completely by the potential and there are no ambiguities how they are mixed. Moreover, CP is violated even when the Hubble parameter is large due to the Hubble induced A-term and cross coupling in F-term, so that the lepton asymmetry is generated just after the end of inflation. As a result, compared with the case of single flat direction, the resultant lepton-to-entropy ratio is enhanced by a factor of $H_{osc}/m_{3/2}$, where $H_{osc}$ is the Hubble parameter at the onset of oscillation and $m_{3/2}$ is the gravitino mass. However, when Hubble induced A-terms do not exist, there remains indefiniteness of initial phases and CP is violated spontaneously by the phase difference between initial phase and potential minima of the hidden-sector induced A-terms. Therefore, CP-violation is not effective until the onset of the oscillation of scalar fields around the origin and there is suppression factor from thermal effect as is the case of single flat direction. In this case, the amplitude of baryon isocurvature perturbation imposes constraints on the model parameters.

18 pages, 8 figures

References in corpus (15)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Baryogenesis from Flat Directions of the Supersymmetric Standard Model
• Primordial Nucleosynthesis: Theory and Observations
• Flat directions in the scalar potential of the supersymmetric standard model
• Some Issues in Flat Direction Baryogenesis
• Reheating and Supersymmetric Flat-Direction Baryogenesis
• New inflation in supergravity with a chaotic initial condition
• Reheating-temperature independence of cosmological baryon asymmetry in Affleck-Dine leptogenesis
• Affleck-Dine Leptogenesis with an Ultralight Neutrino
• Dynamics of MSSM flat directions consisting of multiple scalar fields
• Affleck-Dine leptogenesis with triplet Higgs
• Leptogenesis via multiscalar coherent evolution with supersymmetric neutrino see-saw
• Flat manifold leptogenesis in the supersymmetric standard model
• Leptogenesis with supersymmetric Higgs triplets in TeV region
• Affleck-Dine leptogenesis via multiscalar evolution in a supersymmetric seesaw model

Cited by in corpus (10)

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• Affleck-Dine dynamics and the dark sector of pangenesis
• Affleck-Dine Baryogenesis and Inflation in Supergravity with Strongly Stabilized Moduli
• The nonperturbative decay of SUSY flat directions
• Constraints on scalar and tensor perturbations in phenomenological and two-field inflation models: Bayesian evidences for primordial isocurvature and tensor modes
• Affleck-Dine baryogenesis with modulated reheating
• Multiple Main Sequence of Globular Clusters as a Result of Inhomogeneous Big Bang Nucleosynthesis
• Affleck-Dine baryogenesis in the SUSY Dine-Fischler-Srednicki-Zhitnitsky axion model without R-parity
• Inflation and Preheating in Supergravity with MSSM Flat Directions
• Revisiting Affleck-Dine Leptogenesis with light sleptons