Performance of a 250L liquid Argon TPC for sub-GeV charged particle identification

TL;DR

This paper evaluates a 150 kg liquid Argon TPC's ability to identify sub-GeV charged particles like pions, kaons, and protons, demonstrating its potential for neutrino and nucleon decay detection.

Contribution

It presents the particle identification performance of a 250L liquid Argon TPC using controlled beam data, advancing detector R&D for future neutrino experiments.

Findings

Effective identification of pions, kaons, and protons at ~800 MeV/c

Demonstrates feasibility of liquid Argon TPC for sub-GeV particle detection

Provides data for optimizing future large-scale detectors

Abstract

We have constructed a liquid Argon TPC detector with fiducial mass of 150 kg as a part of the R&D program of the next generation neutrino and nucleon decay detector. This paper describes a study of particle identification performance of the detector using well-defined charged particles (pions, kaons, and protons) with momentum of ~800 MeV/$c$ obtained at J-PARC K1.1BR beamline.