Search for anomalous single-photon production in MicroBooNE as a first test of the MiniBooNE low-energy excess

  • Oct. 1, 2021, 4:00 pm US/Central
  • Mark Ross-Lonergan, Columbia University

We report first results from a search for neutrino-induced neutral current (NC) resonant ∆(1232) baryon production followed by ∆ radiative decay. Data corresponding to MicroBooNE’s first three years of operations (6.80×1020 protons on target) are used to select single-photon events with one or zero protons and without charged leptons in the final state. The background is constrained via an in-situ high-purity measurement of NC π0 events. This provides the world’s most sensitive search for NC Delta→Ngamma below 1 GeV, and a first test of the MiniBooNE low-energy excess under a single photon hypothesis.

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