First Observation of Low Energy Electron Neutrinos in a Liquid Argon Time Projection Chamber

Abstract

The capabilities of liquid argon time projection chambers (LArTPCs) to reconstruct the spatial and calorimetric information of neutrino events have made them the detectors of choice in a number of experiments, specifically those looking to observe electron neutrino (${\nu }_e$) appearance. The LArTPC promises excellent background rejection capabilities, especially in this "golden" channel for both short and long baseline neutrino oscillation experiments. We present the first experimental observation of electron neutrinos and anti-neutrinos in the ArgoNeut LArTPC, in the energy range relevant to DUNE and the Fermilab Short Baseline Neutrino Program. We have selected 37 electron candidate events and 274 gamma candidate events, and measured an 80\% purity of electrons based on a topological selection. Additionally, we present a of separation of electrons from gammas using calorimetric energy deposition, demonstrating further separation of electrons from background gammas.

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• Observation of electron-antineutrino disappearance at Daya Bay
• Measurement of the neutrino mass splitting and flavor mixing by MINOS
• First measurement of electron neutrino appearance in NOvA
• Long-Baseline Neutrino Facility (LBNF) and Deep Underground Neutrino Experiment (DUNE) Conceptual Design Report Volume 2: The Physics Program for DUNE at LBNF
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Cited by in corpus (26)

• The Short-Baseline Neutrino Program at Fermilab
• Status of Light Sterile Neutrino Searches
• Where Are We With Light Sterile Neutrinos?
• First results on ProtoDUNE-SP liquid argon time projection chamber performance from a beam test at the CERN Neutrino Platform
• Ionization Electron Signal Processing in Single Phase LArTPCs II. Data/Simulation Comparison and Performance in MicroBooNE
• U(1)' mediated decays of heavy sterile neutrinos in MiniBooNE
• Neutrino Trident Scattering at Near Detectors
• LArPix: Demonstration of low-power 3D pixelated charge readout for liquid argon time projection chambers
• Complete predictions for high-energy neutrino propagation in matter
• Gaseous and dual-phase time projection chambers for imaging rare processes
• Michel Electron Reconstruction Using Cosmic-Ray Data from the MicroBooNE LArTPC
• Explaining the MiniBooNE Excess Through a Mixed Model of Oscillation and Decay
• Search for Boosted Dark Matter at ProtoDUNE
• Prospects for Detecting Boosted Dark Matter in DUNE through Hadronic Interactions
• Reconstruction and Measurement of $\mathcal{O}$(100) MeV Energy Electromagnetic Activity from ${\pi }^0\to \gamma \gamma$ Decays in the MicroBooNE LArTPC
• Boosted Dark Matter Quarrying at Surface Neutrino Detectors
• Benefits of MeV-scale reconstruction capabilities in large liquid argon time projection chambers
• Review of Liquid Argon Detector Technologies in the Neutrino Sector
• First Measurement of Electron Neutrino Scattering Cross Section on Argon
• Probing Energetic Light Dark Matter with Multi-Particle Tracks Signatures at DUNE
• Searching for Boosted Dark Matter via Dark-Strahlung
• Comparison of νμ-Ar multiplicity distributions observed by MicroBooNE to GENIE model predictions
• Cosmic Background Removal with Deep Neural Networks in SBND
• Adversarial methods to reduce simulation bias in neutrino interaction event filtering at Liquid Argon Time Projection Chambers
• Measurement of the Flux-Averaged Inclusive Charged-Current Electron Neutrino and Antineutrino Cross Section on Argon using the NuMI Beam and the MicroBooNE Detector
• Finding BSM Needles in Electromagnetic Haystacks at DUNE