Gravity-Mediated Dark Matter at a low reheating temperature

TL;DR

This paper investigates gravity-mediated dark matter interactions via spin-two particles in a low reheating temperature universe, challenging traditional thermal relic assumptions and exploring diverse experimental constraints.

Contribution

It introduces a novel low reheating temperature regime in gravity-mediated dark matter models, expanding the phenomenological landscape beyond standard thermal scenarios.

Findings

Constraints from relic abundance, colliders, and direct detection are analyzed across a wide mass range.

The low reheating temperature scenario alters dark matter production and detection prospects.

New phenomenological possibilities for gravity-mediated dark matter are identified.

Abstract

We present a new study on the Gravity-Mediated Dark Matter (GMDM) scenario, where interactions between dark matter (DM) and the Standard Model are mediated by spin-two particles. Expanding on this established framework, we explore a novel regime characterized by a low reheating temperature that offers an alternative to the conventional thermal relic paradigm. This approach opens new possibilities for understanding the dynamics of the dark sector, encompassing both the dark matter particles (fermion, scalar and vector) and the spin-two mediators. Our analysis examines the constraints imposed by the relic abundance of DM, collider experiments, and direct detection searches, spanning a wide mass range for the dark sector, from very light to extremely heavy states. This work opens new possibilities for the phenomenology of GMDM.