Development of a Low pT Muon LVL2 Trigger Algorithm with the ATLAS TileCal Detector

This research report is framed in the commissioning phase of the ATLAS experiment. It is devoted to the TileCal muon identification algorithm, TileMuId, which makes use of the energy deposition in the calorimeter cells following projective patterns in $\eta$. The main purpose of this algorithm is to be used at Level-2 trigger for low $p_{\text{T}}$ muons. The implementation of the algorithm in the TileCal ROD DSP firmware is discussed since the preprocessing at this stage can be used to save time at Level-2. The efficiency and fraction of fakes expected with this ROD-based version of the algorithm are evaluated using different samples of Monte Carlo data. Results obtained executing the algorithm online in the ROD DSPs during cosmics runs are also shown. Finally, the software implemented in the Athena framework related to this new version of the algorithm is summarized.