Parametric Coincidence in the Baryon to Dark Matter Ratio from Affleck-Dine Baryogenesis and UV Freeze-in Dark Matter

Abstract

We highlight that the observed concurrence between the baryon and dark matter relic densities can be explained via a parametric coincidence between two distinct production mechanisms: Affleck-Dine baryogenesis and dark matter UV freeze-in. In the Affleck-Dine mechanism, the baryon asymmetry is naturally proportional to the inflationary reheating temperature $T_{\mathrm{rh}}$, which also plays a critical role in setting the relic abundance of UV freeze-in dark matter. Since Affleck-Dine baryogenesis requires flat directions in the potential, the framework is inherently supersymmetric, offering compelling UV freeze-in dark matter candidates such as the gravitino. We outline scenarios in which $T_{\mathrm{rh}}$ simultaneously determines both relic abundances, resulting in a baryon-to-dark matter ratio of order unity that is largely insensitive to $T_{\mathrm{rh}}$. We also discuss the conditions required to avoid Q-ball formation or dark matter production by other mechanisms, such as NLSP decays, to preserve the parametric coincidence between baryon and dark matter abundances.

13 pages + appendices and references, 3 figures. v2: version accepted by PRD

References in corpus (23)

• The Well-Tempered Neutralino
• Big-Bang Nucleosynthesis and Gravitino
• Big Bang Nucleosynthesis Constraints on Hadronically and Electromagnetically Decaying Relic Neutral Particles
• Thermal production of gravitinos
• Sneutrino cold dark matter, a new analysis: relic abundance and detection rates
• Enhancement of the Dark Matter Abundance Before Reheating: Applications to Gravitino Dark Matter
• Constraints on decaying dark matter from the extragalactic gamma-ray background
• Gravitino Dark Matter and general neutralino NLSP
• Search for 100 MeV to 10 GeV gamma-ray lines in the Fermi-LAT data and implications for gravitino dark matter in the $\mu \nu$SSM
• Cosmological Constraints on Gravitino LSP Scenario with Sneutrino NLSP
• Light mixed sneutrinos as thermal dark matter
• Cosmological Constraints on Neutrino Injection
• The quest to discover supersymmetry at the ATLAS experiment
• Affleck-Dine Baryogenesis and Dark Matter Production after High-scale Inflation
• Light Higgsinos in Pure Gravity Mediation
• Gravitino dark matter from increased thermal relic particles
• Affleck-Dine baryogenesis with R-parity violation
• Sommerfeld enhancement of resonant dark matter annihilation
• Axino LSP Baryogenesis and Dark Matter
• Dark matter candidates in the NMSSM with RH neutrino superfields
• The ABC of RPV II: Classification of R-parity Violating Signatures from UDD Couplings and their Coverage at the LHC
• Gravitino Dark Matter and Flavor Symmetries
• Right-handed sneutrino and gravitino multicomponent dark matter in light of neutrino detectors