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Updated: May 24, 2026
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Published on: April 13, 2016
Inclusive Search for Anomalous Single-Photon Production in MicroBooNE
P Abratenko1, D Andrade Aldana2, L Arellano3
1Tufts University, Medford, Massachusetts 02155, USA.
Physical Review Letters
|May 22, 2026
Summary
The MicroBooNE experiment searched for single-photon events from neutrino interactions, motivated by a previous anomaly. While the overall data agreed with predictions, a subsample showed a slight excess of events at low energies.
Area of Science:
- Particle Physics
- Experimental Neutrino Physics
Background:
- Previous observation of a low-energy excess of electromagnetic shower events by the MiniBooNE experiment.
- Motivated an inclusive search for anomalous single-photon production in neutrino interactions.
Purpose of the Study:
- To search for anomalous single-photon production in neutrino interactions.
- To investigate the MiniBooNE low-energy excess anomaly.
Main Methods:
- Utilized the Wire-Cell reconstruction framework to select single-photon final-state interactions.
- Employed simultaneous measurements of charged current and neutral current sidebands to constrain background predictions.
- Performed a blind analysis on data collected from February 2016 to July 2018 (6.34×10^20 POT).
Main Results:
- Observed agreement between data and predictions in the full signal region (p-value = 0.11).
- Identified a subsample with no visible protons, revealing 93±22(stat)±35(syst) events above prediction.
- This subsample excess, concentrated below 600 MeV, reached a local significance of just over 2σ.
Conclusions:
- The inclusive search for single-photon events did not reveal a significant anomaly in the full signal region.
- A localized excess in a specific subsample warrants further investigation, potentially related to the MiniBooNE anomaly.
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