Demonstration of neutron identification in neutrino interactions in the MicroBooNE liquid argon time projection chamber

Abstract

A significant challenge in measurements of neutrino oscillations is reconstructing the incoming neutrino energies. While modern fully-active tracking calorimeters such as liquid argon time projection chambers in principle allow the measurement of all final state particles above some detection threshold, undetected neutrons remain a considerable source of missing energy with little to no data constraining their production rates and kinematics. We present the first demonstration of tagging neutrino-induced neutrons in liquid argon time projection chambers using secondary protons emitted from neutron-argon interactions in the MicroBooNE detector. We describe the method developed to identify neutrino-induced neutrons and demonstrate its performance using neutrons produced in muon-neutrino charged current interactions. The method is validated using a small subset of MicroBooNE's total dataset. The selection yields a sample with $60\%$ of selected tracks corresponding to neutron-induced secondary protons.

References in corpus (13)

• An Improved Measurement of Neutrino Oscillation Parameters by the NOvA Experiment
• Recent highlights from GENIE v3
• Precision constraints for three-flavor neutrino oscillations from the full MINOS+ and MINOS data set
• New CC0π GENIE Model Tune for MicroBooNE
• First constraints on light sterile neutrino oscillations from combined appearance and disappearance searches with the MicroBooNE detector
• Calorimetric classification of track-like signatures in liquid argon TPCs using MicroBooNE data
• Multi-Differential Cross Section Measurements of Muon-Neutrino-Argon Quasielastic-like Reactions with the MicroBooNE Detector
• Measurement of ${}^{nat}$Pb(${\nu }_e$,X$n$) production with a stopped-pion neutrino source
• Measurement of ambient radon progeny decay rates and energy spectra in liquid argon using the MicroBooNE detector
• Measurement of the Atmospheric Muon Rate with the MicroBooNE Liquid Argon TPC
• Observation of Radon Mitigation in MicroBooNE by a Liquid Argon Filtration System
• Measurement of the Neutron Cross Section on Argon Between 95 and 720 MeV
• Measurement of double-differential cross sections for mesonless charged-current muon neutrino interactions on argon with final-state protons using the MicroBooNE detector

Cited by in corpus (3)

• Demonstration of new MeV-scale capabilities in large neutrino LArTPCs using ambient radiogenic and cosmogenic activity in MicroBooNE
• Measurement of neutron production in atmospheric neutrino interactions at Super-Kamiokande
• First study of neutrino angle reconstruction using quasielastic-like interactions in MicroBooNE