Reconstruction and Measurement of \mathcalO(100) MeV Energy Electromagnetic Activity from π⁰ → γγ Decays in the MicroBooNE LArTPC

Weber, Michele; Ereditato, Antonio; Kreslo, Igor; Chen, Yifan; Lorca Galindo, David; Mettler, Thomas Josua; Sinclair, James Robert (2020). Reconstruction and Measurement of \mathcalO(100) MeV Energy Electromagnetic Activity from π⁰ → γγ Decays in the MicroBooNE LArTPC. Journal of instrumentation, 15(02), P02007-P02007. Institute of Physics Publishing IOP 10.1088/1748-0221/15/02/P02007

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We present results on the reconstruction of electromagnetic (EM) activity from photonsproduced in charged currentνμinteractions with final stateπ0s. We employ a fully-automatedreconstruction chain capable of identifying EM showers ofO(100) MeV energy, relying on a com-bination of traditional reconstruction techniques together with novel machine-learning approaches.These studies demonstrate good energy resolution, and good agreement between data and simula-tion, relying on the reconstructed invariantπ0mass and other photon distributions for validation.The reconstruction techniques developed are applied to a selection ofνμ+Ar→μ+π0+Xcandidate events to demonstrate the potential for calorimetric separation of photons from electronsand reconstruction ofπ0kinematics

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