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  • Cosmic Ray Background Rejection with Wire-Cell LArTPC Event Reconstruction in the MicroBooNE Detector
    collaboration, MicroBooNE; Abratenko, P; Alrashed, M; R An; Anthony, J; Ashkenazi, A; Balasubramanian, S; Baller, B; Bathe-Peters, L; Berkman, S; Bolton, T; Caratelli, D; R Castillo Fernandez; Cerati, G; Conrad, J M; Convery, M; Cooper-Troendle, L; Crespo-Anadon, J I; Devitt, D; Diurba, R; Duffy, K; Dytman, S; Eberly, B; L Escudero Sanchez; Fiorentini Aguirre, G A; Fleming, B T; Foppiani, N; Furmanski, A P; Garcia-Gamez, D; Gardiner, S; G Ge; Gollapinni, S; Green, P; Greenlee, H; W Gu; Hamilton, P; Horton-Smith, G A; Hourlier, A; James, C; de Vries, J Jan; Jiang, L; Johnson, R A; Jwa, Y J; Ketchum, W; Kobilarcik, T; Kreslo, I; Lepetic, I; Y Li; Louis, W C; Mariani, C; Marsden, D; Marshall, J; Martin-Albo, J; Mason, K; Mastbaum, A; McConkey, N; Mistry, K; Mooney, M; Moore, C D; Mousseau, J; Naples, D; Papadopoulou, A; Papavassiliou, V; Paudel, A; Piasetzky, E; Qian, X; Radeka, V; Reggiani-Guzzo, M; Ren, L; Rochester, L; J Rodriguez Rondon; Rogers, H E; Russell, B; Scanavini, G; Schukraft, A; Sinclair, J; Smith, A; Snider, E L; Soldner-Rembold, S; Soleti, S R; Spentzouris, P; Spitz, J; Stancari, M; Sutton, K; Sword-Fehlberg, S; Szelc, A M; Tagg, N; Thorpe, C; Toups, M; Y -T Tsai; Tufanli, S; Uchida, M A; Viren, B; Wei, H; Williams, Z; Wolbers, S; Wospakrik, M; W Wu; Yandel, E; Yu, H W

    arXiv.org, 06/2021
    Paper, Journal Article

    For a large liquid argon time projection chamber (LArTPC) operating on or near the Earth's surface to detect neutrino interactions, the rejection of cosmogenic background is a critical and challenging task because of the large cosmic ray flux and the long drift time of the TPC. We introduce a superior cosmic background rejection procedure based on the Wire-Cell three-dimensional (3D) event reconstruction for LArTPCs. From an initial 1:20,000 neutrino to cosmic-ray background ratio, we demonstrate these tools on data from the MicroBooNE experiment and create a high performance generic neutrino event selection with a cosmic contamination of 14.9\% (9.7\%) for a visible energy region greater than O(200)~MeV. The neutrino interaction selection efficiency is 80.4\% and 87.6\% for inclusive \(\nu_\mu\) charged-current and \(\nu_e\) charged-current interactions, respectively. This significantly improved performance compared to existing reconstruction algorithms, marks a major milestone toward reaching the scientific goals of LArTPC neutrino oscillation experiments operating near the Earth's surface.

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