Affleck-Dine baryogenesis and gravitino dark matter

Abstract

Affleck-Dine baryogenesis in models where the gravitino is both the lightest supersymmetric particle and the dark matter candidate is investigated. For a high enough reheating temperature to produce sufficient gravitinos by thermal processes, the observed baryon asymmetry can be explained by Affleck-Dine baryogenesis as well as thermal leptogenesis. On the other hand, if the reheating temperature is not high enough, most of the gravitinos must be produced by the decay of the next-to-lightest supersymmetric particle (NSP). Particularly, in the case where Q-balls cannot survive the evaporation, the gravitino number density is given by the NSP's thermal relic density. Interestingly, if Q-balls survive, they can be a source of gravitinos via the NSP decay. Then, we could find a new cosmological interesting region in parameter space because the gravitino number density does not relate to the NSP's thermal relic density.

13 pages, no figure, reference added and typos corrected, final version

References in corpus (6)

• Supergravity with a Gravitino LSP
• Gravitino Dark Matter in the CMSSM and Implications for Leptogenesis and the LHC
• Fate of oscillating scalar fields in the thermal bath and their cosmological implications
• Production and dilution of gravitinos by modulus decay
• A brane world cosmological solution to the gravitino problem
• Evaporation of charged bosonic condensate in cosmology

Cited by in corpus (21)

• Dark matter production in the early Universe: beyond the thermal WIMP paradigm
• Neutralino dark matter from heavy axino decay
• Axino dark matter from Q-balls in Affleck-Dine baryogenesis and the ${\Omega }_b-{\Omega }_{DM}$ coincidence problem
• Gravitino dark matter from Q-ball decays
• Long life stau in the minimal supersymmetric standard model
• Generating the Observed Baryon Asymmetry from the Inflaton Field
• Axino warm dark matter and ${\Omega }_b-{\Omega }_{DM}$ coincidence
• Non-Gaussianity from Baryon Asymmetry
• Q-balls in flat potentials
• Supersymmetric Q-balls: A Numerical Study
• Gravitino dark matter and baryon asymmetry from Q-ball decay in gauge mediation
• Light Dirac right-handed sneutrino dark matter
• Gravitino dark matter from increased thermal relic particles
• Dark Matter Gravitinos and Baryons via Q-ball decay in the Gauge-Mediated MSSM
• Non-thermal WIMP baryogenesis
• The Physics of Q-balls
• Higgsino-like Dark Matter From Sneutrino Late Decays
• Axino dark matter and baryon number asymmetry production by the Q-ball decay in gauge mediation
• Baryon Asymmetries in the Natural Inflation Model
• Supersymmetric inflation and baryogenesis via Extra-Flat directions of the MSSM
• Affleck-Dine leptogenesis and its backreaction to inflaton dynamics