R-Hadron Search at ATLAS

In this thesis I motivate and present a search for long lived massive R- hadrons using the data collected by the ATLAS detector in 2011. Both ionisation- and time-of-flight-based methods are described. Since no signal was found, a lower limit on the mass of such particles is set. The analysis was also published by the ATLAS collboration in Phys.Lett.B. titled 'Searches for heavy long-lived sleptons and R-Hadrons with the ATLAS detector in pp collisions at sqrt(s) = 7 TeV'.