# Gaugino Portal Baryogenesis

## TL;DR

This paper explores a novel baryogenesis mechanism via a gaugino portal, where hidden sector gaugino decays generate the Universe's matter-antimatter asymmetry, with potential signals in collider and dark matter experiments.

## Contribution

It introduces a new baryogenesis scenario involving gaugino portal interactions, analyzing its viability across various hidden sector models and mass scales.

## Key findings

- Mechanism can produce baryon asymmetry for gaugino masses as low as 10 GeV.
- Late out-of-equilibrium decays are crucial for asymmetry generation.
- Potential signals in collider, low-energy, and dark matter detection experiments.

## Abstract

We study baryogenesis via a gaugino portal, the supersymmetric counterpart to the widely studied kinetic mixing portal, to a hidden sector. CP and baryon number violating decays of a hidden sector gaugino into the visible sector can produce the observed baryon asymmetry of the Universe. The tiny portal coupling is crucial in producing late out-of-equilibrium decays, after washout processes that can erase the asymmetry have gone out of equilibrium. We study this mechanism within various scenarios, including freeze-in or freeze-out of the hidden gaugino, as well as extended frameworks where the hidden sector contains a weakly interacting massive particle (WIMP) dark matter candidate. This mechanism can produce the desired asymmetry over a wide range of mass scales, including for hidden gaugino masses as low as 10 GeV. We also discuss possible related signals with direct collider searches, at low energy experiments, and in dark matter direct and indirect detection.