Journal article
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
- 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 (6.80×1020 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 π0 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.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, 407.9KB, Terms of use)
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- Publisher copy:
- 10.1103/physrevlett.128.111801
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review Letters More from this journal
- Volume:
- 128
- Issue:
- 11
- Article number:
- 111801
- Publication date:
- 2022-03-14
- Acceptance date:
- 2022-02-10
- DOI:
- EISSN:
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1079-7114
- ISSN:
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0031-9007
- Pmid:
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35363017
- Language:
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English
- Keywords:
- Pubs id:
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1249401
- Local pid:
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pubs:1249401
- Deposit date:
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2022-06-27
Terms of use
- Copyright holder:
- American Physical Society
- Copyright date:
- 2022
- Rights statement:
- Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
- Licence:
- CC Attribution (CC BY)
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