Search for Heavy Long-Lived Charged Particles with the ATLAS detector in pp collisions at $\sqrt{S} = 7\TeV$

A search for long-lived charged particles reaching the muon spectrometer is performed using a data sample of $37~\ipb$ from $pp$ collisions at $\sqrt{s} = 7\TeV$ collected by the ATLAS detector at the LHC. No excess is observed above the estimated background. Stable $\tilde{\tau}$ sleptons are excluded at 95\%~CL up to a mass of 136~\GeV, in GMSB models with $N_5=3$, ${m_{\rm{messenger}}=250\TeV}$, $\mathrm{sign}(\mu)=1$ and $\rm{\tan}\beta=5$. Electroweak production of sleptons is excluded up to a mass of 110~\GeV. Gluino {\it{R}}-hadrons in a generic interaction model are excluded up to masses of 530~\GeV to 544~\GeV depending on the fraction of {\it{R}}-hadrons produced as $\tilde{g}$-balls.