Revisiting the gravitino dark matter and baryon asymmetry from Q-ball decay in gauge mediation

TL;DR

This paper reevaluates how Q-ball decay in gauge-mediated SUSY breaking can naturally explain both baryon asymmetry and gravitino dark matter, using updated decay rate calculations.

Contribution

It provides a more accurate analysis showing that direct gravitino production from Q-ball decay is a viable explanation for dark matter and baryon asymmetry.

Findings

Direct gravitino production from Q-ball decay is viable.

Updated decay rates support the scenario's naturalness.

The scenario remains consistent with gauge-mediated SUSY breaking.

Abstract

We reinvestigate the scenario that the amount of the baryons and the gravitino dark matter is naturally explained by the decay of the Q balls in the gauge-mediated SUSY breaking. Equipped by the more correct decay rates into gravitinos and baryons recently derived, we find that the scenario with the direct production of the gravitino dark matter from the Q-ball decay works naturally.