P. Abratenko, D. Andrade Aldana, Luciano Arellano, J. Asaadi, A. Ashkenazi, S. Balasubramanian, B. Baller, A. Barnard, G. Barr, D. Barrow, D. Barrow, V. Basque, J. Bateman, O. Benevides Rodrigues, S. Berkman, A. Bhat, Meghna Bhattacharya, M. Bishai, A. Blake, B. Bogart, T. Bolton, M. B. Brunetti, L. Camilleri, D. Caratelli, F. Cavanna, G. B. Cerati, A. Chappell, Yifan Chen, J. M. Conrad, M. Convery, L. Cooper-Troendle, J. I. Crespo-Anadón, Ryan Cross, M. Del Tutto, S. R. Dennis, Jan Detje, Z. Djurcic, Z. Djurcic, K. Duffy, S. Dytman, B. Eberly, P. Englezos, A. Ereditato, J. J. Evans, C. Fang, W. Foreman, B. T. Fleming, D. Franco, A. P. Furmanski, Fan Gao, D. García-Gámez, S. Gardiner, Guanqun Ge, S. Gollapinni, E. Gramellini, P. Green, H. Greenlee, L. Gu, L. Gu, L. Gu, P. Guzowski, L. Hagaman, M. D. Handley, O. Hen, C. Hilgenberg, G. A. Horton-Smith, A. Hussain, B. Irwin, M. Ismail, C. James, Xiangpan Ji, X. Ji, J. H. Jo, D. Kalra, G. Karagiorgi, Wesley Ketchum, M. Kirby, T. Kobilarcik, N. Lane, J.-Y. Li, Yichen Li, Keng Lin, J. -Y. Li, L. Liu, W. C. Louis, Xiao Luo, Tariq Mahmud, C. Mariani, D. Marsden, J. Marshall, N. Lorenzo Martinez, Narei Lorenzo Martinez, Sergey Martynenko, A. Mastbaum, Isobel Mawby, N. McConkey, L. Mellet, Jesus Eduardo Munoz Mendez, Jessie Micallef, A. Mogan
We present an inclusive search for anomalous production of single-photon events from neutrino interactions in the MicroBooNE experiment. The search and its signal definition are motivated by the previous observation of a low-energy excess of electromagnetic shower events from the MiniBooNE experiment. We use the Wire-Cell reconstruction framework to select a sample of inclusive single-photon final-state interactions with a final efficiency and purity of 7.0% and 40.2%, respectively. We leverage simultaneous measurements of sidebands of charged current ν_{μ} interactions and neutral current interactions producing π^{0} mesons to constrain signal and background predictions and reduce uncertainties. We perform a blind analysis using a dataset collected from February 2016 to July 2018, corresponding to an exposure of 6.34×10^{20} protons on target from the Booster Neutrino Beam at Fermilab. In the full signal region, we observe agreement between the data and the prediction, with a goodness-of-fit p value of 0.11. We then isolate a subsample of these events containing no visible protons, and observe 93±22(stat)±35(syst) data events above prediction, corresponding to just above 2σ local significance, concentrated at shower energies below 600 MeV.