arxiv: 1910.02166 · v1 · ★pith:FRHDWUAEnew · submitted 2019-10-04 · ✦ hep-ex · physics.ins-det
Reconstruction and Measurement of mathcal{O}(100) MeV Energy Electromagnetic Activity from π⁰ rightarrow γγ Decays in the MicroBooNE LArTPC
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We present results on the reconstruction of electromagnetic (EM) activity from photons produced in charged current $\nu_{\mu}$ interactions with final state $\pi^0$s. We employ a fully-automated reconstruction chain capable of identifying EM showers of $\mathcal{O}$(100) MeV energy, relying on a combination of traditional reconstruction techniques together with novel machine-learning approaches. These studies demonstrate good energy resolution, and good agreement between data and simulation, relying on the reconstructed invariant $\pi^0$ mass and other photon distributions for validation. The reconstruction techniques developed are applied to a selection of $\nu_{\mu} + {\rm Ar} \rightarrow \mu + \pi^0 + X$ candidate events to demonstrate the potential for calorimetric separation of photons from electrons and reconstruction of $\pi^0$ kinematics.
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