literature

Optimal Transport for e/π0\pi^0 Particle Classification in LArTPC Neutrino Experiments

Collaboration
for the collaboration.
Aug 9, 2024
14 pages
Report number:
  • FERMILAB-SLIDES-24-0157-V

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Abstract: (submitter)
Separation of electron signals from π0\pi^0 backgrounds is crucial for neutrino oscillation measurements and searches for Beyond Standard Model (BSM) physics in current and future Liquid Argon Time Projection Chamber (LArTPC) experiments. e/π0\pi^0 separation has been a reconstruction challenge since both e and π0\pi^0 present as electromagnetic showers, and often only one out of the two showers produced by π0\pi^0 is reconstructed correctly. This research aims to improve the performance of e/π0\pi^0 separation using optimal transport (OT), by leveraging on the topological differences in the showers produced by the two particles. OT is a method which compares two distributions by finding the most efficient way to transform, or “move” from one to the other. This work uses the MicroBooNE open samples public dataset to test the e/π0\pi^0 separation performance of the method on events which incorporate realistic modeling of LArTPC detector response. Reconstructed 3D energy deposits are projected onto a plane perpendicular to the primary shower, allowing OT to better detect the topological differences between the two types of particles without the need to separately reconstruct all the showers in the events. Different distance metrics for OT are tested and preliminary results on e/π0\pi^0 separation are presented.
Note:
  • 56th Annual Fermilab Users & New Perspectives Meeting
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