Speaker
Description
Mu2e will search for the neutrinoless coherent $\mu^-\rightarrow e^-$ conversion in the field of an Al nucleus, a Charged Lepton Flavor Violation (CLFV) process. The experiment is expected to start in 2026 and will improve the current limit by 4 orders of magnitude.
Mu2e consists of a straw-tube tracker and crystal calorimeter in a 1T B field complemented by a plastic scintillation counter veto to suppress cosmic ray backgrounds. The tracker geometry, composed of 36 tracking planes equally spaced with straws transverse to the beamline, makes track reconstruction a quite unique problem.
The first step of track reconstruction is hit clustering, in space and time. Pattern recognition is performed for each time cluster to identity hit combinations compatible with a 3D helix and remove background hits. Track fitting acts on the hit combinations to determine precision track parameters. The existing algorithms are robust and efficient for the topologies of interest for the principal physics analyses. However, we developed pattern recognition algorithms to improve track reconstruction of multi-particle events which are important for background estimates through data-driven procedures.
