Axino LSP Baryogenesis and Dark Matter

Abstract

We discuss a new mechanism for baryogenesis, in which the baryon asymmetry is generated by the lightest particle in another sector, for example the supersymmetric particle (LSP), decaying to quarks via baryonic-number-violating interactions. As a specific example, we use a supersymmetric axion model with an axino LSP and baryonic $R$-parity violation. This scenario predicts large $R$-parity violation for the stop, and an upper limit on the squark masses between {15 and 130 TeV}, for different choices of the Peccei-Quinn scale and the soft $X_t$ terms. We discuss the implications for the nature of dark matter in light of the axino baryogenesis mechanism, and find that both the axion and a metastable gravitino can provide the correct dark matter density. In the axion dark matter scenario, the initial misalignment angle is restricted to be $\mathcal{O}(1)$. On the other hand, the reheating temperature is linked to the PQ scale and should be higher than $10^4-10^5$ GeV in the gravitino dark matter scenario.

arXiv commentv2: 23 pages, 4 figures. Version accepted by JCAP. Added gaugino contribution to ΔB=2 process and relative discussion, fixed numerical factors in asymmetry parameter and added references

References in corpus (40)

• Planck 2013 results. XVI. Cosmological parameters
• An Improved Experimental Limit on the Electric Dipole Moment of the Neutron
• R-parity violating supersymmetry
• Big-Bang Nucleosynthesis and Hadronic Decay of Long-Lived Massive Particles
• Thermal Production of Gravitinos
• Axinos as Cold Dark Matter
• Thermal Gravitino Production and Collider Tests of Leptogenesis
• Thermal production of gravitinos
• Axinos as Dark Matter
• Sphaleron Erasure of Primordial Baryogenesis
• Axino dark matter from thermal production
• MFV SUSY: A Natural Theory for R-Parity Violation
• Stability of the CMSSM against sfermion VEVs
• Baryogenesis for WIMPs
• Vacuum Stability and the MSSM Higgs Mass
• Thermal production of axino Dark Matter
• Minimal Flavor Violation, Seesaw, and R-parity
• Search for pair production of massive particles decaying into three quarks with the ATLAS detector in sqrt(s) = 7 TeV pp collisions at the LHC
• 2-Loop Supersymmetric Renormalisation Group Equations Including R-Parity Violation and Aspects of Unification
• Dark matter in the Kim-Nilles mechanism
• Effective interactions of axion supermultiplet and thermal production of axino dark matter
• Cosmology of the DFSZ axino
• Prospects of antideuteron detection from dark matter annihilations or decays at AMS-02 and GAPS
• Dark Matters in Axino Gravitino Cosmology
• Search for three-jet resonances in pp collisions at sqrt(s) = 7 TeV
• R-parity violation and the cosmological gravitino problem
• Pulling Out All the Stops: Searching for RPV SUSY with Stop-Jets
• Natural Baryogenesis from Unnatural Supersymmetry
• Antideuteron Limits on Decaying Dark Matter with a Tuned Formation Model
• Photon, Neutrino and Charged Particle Spectra from R-violating Gravitino Decays
• Weak Scale Baryogenesis in a Supersymmetric Scenario with R-parity violation
• Baryogenesis with Higher Dimension Operators
• Constraints on R parity and B violating couplings in gauge-mediated supersymmetry breaking models
• Mixed axion/gravitino dark matter from SUSY models with heavy axinos
• Constraints on R-Parity violating stop couplings from flavor physics
• Natural, R-parity violating supersymmetry and horizontal flavor symmetries
• Baryon Number Violation in Particle Decays
• Out-of-equilibrium Baryogenesis and SuperWIMP Dark Matter
• Resurrecting light stops after the 125 GeV Higgs in the baryon number violating CMSSM
• Gravitino Dark Matter and Flavor Symmetries

Cited by in corpus (9)

• Twin Baryogenesis
• A TeV Scale Model for Baryon and Lepton Number Violation and Resonant Baryogenesis
• A Review of WIMP Baryogenesis Mechanisms
• Thermal Goldstino Production with Low Reheating Temperatures
• Baryon Number Violation via Majorana Neutrinos in the Early Universe, at the LHC, and Deep Underground
• New signatures and limits on R-parity violation from resonant squark production
• LHC Signatures of WIMP-triggered Baryogenesis
• LSP baryogenesis and neutron-antineutron oscillations from R-parity violation
• Parametric Coincidence in the Baryon to Dark Matter Ratio from Affleck-Dine Baryogenesis and UV Freeze-in Dark Matter