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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:
). (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: http://dx.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 ( 1 γ 1 p and 1γ 0 p , respectively). The background is constrained via an in situ high-purity measurement of NC π 0 events, made possible via dedicated 2γ 1 p and 2γ 0 p selections. A total of 16 and 153 events are observed for the 1γ 1 p and 1γ 0 p 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 | ||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Neutrinos , Neutrinos -- Decay, Photons , Low-energy nuclear reactions | ||||||||||||||||||||||||
| 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 | ||||||||||||||||||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||||||||||||||
| Date of first compliant deposit: | 10 June 2022 | ||||||||||||||||||||||||
| Date of first compliant Open Access: | 10 June 2022 | ||||||||||||||||||||||||
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