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Search for neutrino-induced neutral-current Δ radiative decay in microBooNE and a first test of the MiniBooNE low energy excess under a single-photon hypothesis
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MicroBooNE Collaboration (Including: Marshall, John). (2022) Search for neutrino-induced neutral-current Δ radiative decay in microBooNE and a first test of the MiniBooNE low energy excess under a single-photon hypothesis. Physical Review Letters, 128 (11). 111801. doi:10.1103/PhysRevLett.128.111801 ISSN 0031-9007.
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Official URL: https://doi.org/10.1103/PhysRevLett.128.111801
Abstract
We report results from a search for neutrino-induced neutral current (NC) resonant Δ(1232) baryon production followed by Δ radiative decay, with a ⟨0.8⟩ GeV neutrino beam. Data corresponding to MicroBooNE's first three years of operations (6.80×10^{20} protons on target) are used to select single-photon events with one or zero protons and without charged leptons in the final state (1γ1p and 1γ0p, respectively). The background is constrained via an in situ high-purity measurement of NC π^{0} events, made possible via dedicated 2γ1p and 2γ0p selections. A total of 16 and 153 events are observed for the 1γ1p and 1γ0p selections, respectively, compared to a constrained background prediction of 20.5±3.65(syst) and 145.1±13.8(syst) events. The data lead to a bound on an anomalous enhancement of the normalization of NC Δ radiative decay of less than 2.3 times the predicted nominal rate for this process at the 90% confidence level (C.L.). The measurement disfavors a candidate photon interpretation of the MiniBooNE low-energy excess as a factor of 3.18 times the nominal NC Δ radiative decay rate at the 94.8% C.L., in favor of the nominal prediction, and represents a greater than 50-fold improvement over the world's best limit on single-photon production in NC interactions in the sub-GeV neutrino energy range.
Item Type: | Journal Article | |||||||||||||||||||||||||||||||||
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Subjects: | Q Science > QC Physics | |||||||||||||||||||||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||||||||||||||||||||
SWORD Depositor: | Library Publications Router | |||||||||||||||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Baryons -- Decay, Baryon resonance, Neutrino interactions | |||||||||||||||||||||||||||||||||
Journal or Publication Title: | Physical Review Letters | |||||||||||||||||||||||||||||||||
Publisher: | American Physical Society | |||||||||||||||||||||||||||||||||
ISSN: | 0031-9007 | |||||||||||||||||||||||||||||||||
Official Date: | 18 March 2022 | |||||||||||||||||||||||||||||||||
Dates: |
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Volume: | 128 | |||||||||||||||||||||||||||||||||
Number: | 11 | |||||||||||||||||||||||||||||||||
Article Number: | 111801 | |||||||||||||||||||||||||||||||||
DOI: | 10.1103/PhysRevLett.128.111801 | |||||||||||||||||||||||||||||||||
Status: | Peer Reviewed | |||||||||||||||||||||||||||||||||
Publication Status: | Published | |||||||||||||||||||||||||||||||||
Re-use Statement: | ** From PubMed via Jisc Publications Router ** History: received 01-10-2021; accepted 10-02-2022. | |||||||||||||||||||||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||||||||||||||||||||
Date of first compliant deposit: | 28 April 2022 | |||||||||||||||||||||||||||||||||
Date of first compliant Open Access: | 28 April 2022 | |||||||||||||||||||||||||||||||||
RIOXX Funder/Project Grant: |
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