Particle identification with the ATLAS TRT

This study compares three methods for the analysis electron-pion separation using the Transition Radiation Tracker in the ATLASIn this study, the dalitz decay channel of neutral pion is selected using electron identification based on a simplified simulation of the TRT response to electrons and pions. A study of alternative treatments of high threshold information is performed to determine the most optimal approach to particle ID using the TRT detector. A chi approach is found to give the best signal significance in this decay channel.Key Words: transition radiation, transition radiation tracker, particle identification, e/? separation, the high-threshold, the low-threshold, LHC, ATLAS.