The Mu2e track triggers for low-momenta particles

The Mu2e experiment at Fermilab is a search for a neutrinoless muon to electron conversion in the field of an aluminum nucleus. It is a process that violates charged lepton flavor conservation. In the experiment, a beam of muons is focused onto an aluminum target to be captured by the nuclei. The energy of the emitted particles is measured. The electron energy that corresponds to this neutrinoless decay is 104.97 MeV. These energy measurements are performed by reconstructing the helical tracks of the charged particles passing through the tracker and hitting a calorimeter. This reconstruction uses two pattern recognition algorithms followed by a track fit.  Along with the conversion electron, there are various other lower-momenta charged particles such as other electrons, positrons, protons, and uncaptured muons that need to be characterized to better understand background statistics and improve calibration accuracy. This poster details the various optimizations of the pattern recognition algorithms and specifically characterizes the trigger performance, such as efficiency, rejection, and thus the expected rates for these low-momenta charged particles.