---
abstract: 'We investigate the phenomenology of the gravitino dark matter scenario with a stau as the next-to-lightest supersymmetric particle at the LHC. For a wide range of gravitino masses the lighter stau is stable on the scale of a detector and gives rise to a prominent signature as a “slow muon”. The direct stau production via the Drell-Yan process is always present and independent of the mass spectrum of the other superparticles, thus providing a lower bound for the discovery potential of this scenario. Performing a careful analysis with particular emphasis on the criteria for observing stau pairs and for distinguishing them from the background, we find that the $14{\ensuremath{\,\textnormal{TeV}}}$ run of the LHC has a promising potential for finding long-lived staus from Drell-Yan production up to very large stau masses.'
author:
- |
    Jan Heisig and Jörn Kersten\
    [*II. Institute for Theoretical Physics, University of Hamburg, Germany*]{}\
    [jan.heisig@desy.de, joern.kersten@desy.de]{}
bibliography:
- '../staus.bib'
title: |
     [ 3rd June 2011\
    ]{} **Production of long-lived staus in the Drell-Yan process\
    **
---

Introduction
============

Supersymmetry (SUSY) with conserved R-parity and a gravitino as the lightest superparticle (LSP) is a viable alternative to the most widely studied scenario with a neutralino LSP. 