July 30, 2022 to August 6, 2022
Cliff Lodge
US/Mountain timezone

MicroBooNE's Search for Anomalous Single-Photon Production in Neutrino Scattering

Aug 5, 2022, 4:10 PM
Magpie B

Magpie B

Talk WG5: Beyond PMNS WG5: Beyond PMNS


Kathryn Sutton (Caltech)


We report the results from MicroBooNE's search for a single-photon excess in the Booster Neutrino Beam at Fermilab, a potential interpretation to the long-standing MiniBooNE low-energy excess anomaly. We highlight recent results targeting neutrino-induced neutral current resonant ∆(1232) baryon production followed by ∆ radiative decay. Data corresponding to MicroBooNE’s first three years of operations (6.80×10^20 protons on target) were used to search for single-photon events with the backgrounds constrained via an in-situ high-purity measurement of NC π0 events. This provided the world’s most sensitive search for NC ∆→Nγ below 1 GeV and disfavors the hypothesis that anomalously large ∆ radiative decay is the origin of the MiniBooNE low-energy excess. Additional cross-checks to this analysis utilizing a separate reconstruction framework are presented, along with plans and progress towards both a model-independent inclusive photon search, and new model-dependent search targeting NC coherent-like single-photon production.

Attendance type In-person presentation

Primary author


Mark Ross-Lonergan (IPPP Durham University)

Presentation materials