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Evading Dark Matter Bounds through NLSP-Assisted Freeze-Out with Long-Lived Signatures
Sarif Khan
https://arxiv.org/abs/2506.10618 https://

Evading Dark Matter Bounds through NLSP-Assisted Freeze-Out with Long-Lived Signatures
In this work, we explore a conversion-driven freeze-out scenario, where the next-to-lightest stable particle (NLSP) sets the dark matter (DM) abundance through the process ``NLSP SM $\leftrightarrow$ DM SM". Although DM is produced via a freeze-out mechanism, its interaction strength with the visible sector can range from weak to feeble couplings. This results in a vast, largely unexplored parameter space that evades current direct, indirect, and collider bounds, while remaining testable in the…