Axino Dark Matter in Moduli-induced Baryogenesis

Understand

We consider axino dark matter in large R-parity violation (RPV).

• In moduli-dominated universe, axino is produced thermally or non-thermally via saxion decay, then late-decaying moduli dilute axino density, which results in the right abundance to explain the present dark matter.
• At the same time baryon asymmetry is generated due to moduli-induced baryogenesis via the large RPV.
• Axino is cosmologically stable in spite of the large RPV since its decay rate is suppressed by the axion decay constant, heavy squark mass or kinematics.