Probing High Reheating Temperature Scenarios at the LHC with Long-Lived Staus

TL;DR

This paper explores how the Large Hadron Collider can test high reheating temperature scenarios in supersymmetric models with gravitino dark matter and long-lived staus, focusing on gluino mass constraints.

Contribution

It demonstrates that high reheating temperature scenarios can be probed at the LHC with relatively low luminosity, providing new experimental tests for supersymmetric cosmology models.

Findings

High reheating temperatures ( extasciitilde{}10^8 GeV) are testable at the LHC.

LHC with 1 fb^{-1} at 7 TeV can explore most of the parameter space.

Constraints from big-bang nucleosynthesis and gravitino abundance are crucial.

Abstract

We investigate the possibility of probing high reheating temperature scenarios at the LHC, in supersymmetric models where the gravitino is the lightest supersymmetric particle, and the stau is the next-to-lightest supersymmetric particle. In such scenarios, the big-bang nucleosynthesis and the gravitino abundance give a severe upper bound on the gluino mass. We find that, if the reheating temperature is \sim 10^8 GeV or higher, the scenarios can be tested at the LHC with an integrated luminosity of O(1 fb^{-1}) at \sqrt{s}=7 TeV in most of the parameter space.