Implications of Catalyzed BBN in the CMSSM with Gravitino Dark Matter

TL;DR

This paper explores how catalyzed Big Bang nucleosynthesis involving long-lived charged particles impacts gravitino dark matter models within the CMSSM, leading to constraints on supersymmetry parameters and cosmological conditions.

Contribution

It provides the first detailed analysis of primordial ^6Li production constraints on CMSSM with gravitino dark matter and long-lived charged particles, deriving new lower bounds on gaugino masses.

Findings

Lower limit on gaugino mass parameter derived from ^6Li abundance constraints.

Implications for supersymmetry searches at the LHC.

Constraints on reheating temperature after inflation.

Abstract

We investigate gravitino dark matter scenarios in which the primordial ^6Li production is catalyzed by bound-state formation of long-lived negatively charged particles X^- with ^4He. In the constrained minimal supersymmetric Standard Model (CMSSM) with the stau^- as the X^-, the observationally inferred bound on the primordial ^6Li abundance allows us to derive a rigid lower limit on the gaugino mass parameter for a standard cosmological history. This limit can have severe implications for supersymmetry searches at the Large Hadron Collider and for the reheating temperature after inflation.