# NuFact 2022: The 23rd International Workshop on Neutrinos from Accelerators

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

## Search for an Anomalous Excess of Electron Neutrino Interactions in MicroBooNE and New Constraints on eV-Scale Sterile Neutrinos

Aug 2, 2022, 4:00 PM
30m
Magpie B

### Magpie B

Talk WG5: Beyond PMNS

### Speaker

Xiangpan Ji (BNL)

### Description

The MicroBooNE collaboration recently released a series of measurements aimed at investigating the nature of the excess of low energy electromagnetic interactions observed by the MiniBooNE collaboration. In the talk, we will present the results on the search for an anomalous excess of electron neutrino events. This search was performed leveraging three independent analyses which target different charged current electron neutrino final-state topologies. The talk will include details on event selection, background estimation, systematic analysis and cross-checks. We additionally will highlight new results that use these well understood charged-current electron neutrino and muon neutrino event selections to perform a search of an eV scale sterile neutrino in the full 3+1 oscillation framework. Constraints will be presented for regions of sterile neutrino parameter space relevant to the Gallium $\nu_e$ disappearance anomaly and LSND/MiniBooNE $\nu_e$ appearance anomalies.

Attendance type In-person presentation

### Primary authors

Xiangpan Ji (BNL) Hanyu Wei (brookhaven national laboratory)

### Co-author

Mark Ross-Lonergan (IPPP Durham University)