Bulletin of the American Physical Society
APS April Meeting 2023
Volume 68, Number 6
Minneapolis, Minnesota (Apr 15-18)
Virtual (Apr 24-26); Time Zone: Central Time
Session H11: Neutrinos II |
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Sponsoring Units: DPF Chair: Andre de Gouvea, Northwestern University Room: Marquette II - 2nd Floor |
Sunday, April 16, 2023 1:30PM - 1:42PM |
H11.00001: Improving the NOvA 3-Flavour Neutrino Oscillation Analysis Event Selection with a Neural Network Based Selection Algorithm Veera Mikola NOvA is a long-baseline neutrino oscillation experiment, consisting of two functionally identical tracking calorimeter detectors deployed in the Fermilab NuMI beam. Both NOvA detectors are placed 14.6 mrad off the beam axis to achieve a narrow-band neutrino flux at about 2 GeV, which is an oscillation maximum at the far detector placed 810km from the target. NOvA has two main oscillation channels: νμ disappearance and νe appearance as well as the anti-neutrino equivalents. |
Sunday, April 16, 2023 1:42PM - 1:54PM |
H11.00002: Measuring neutrino and antineutrino interactions in the NOvA Near Detector Gregory J Pawloski NOvA is an accelerator-neutrino experiment that utilizes a liquid-scintillator tracking-calorimeter Near Detector (ND) that is approximately 1 km from the production target. Based on its composition and off-axis position with respect to the accelerator beam, the ND can measure neutrino interactions which predominantly occur within the nuclei of hydrocarbons at a narrow-band of energies around 2 GeV. Furthermore, the detector can observe interactions involving both muon neutrinos and electron neutrinos, as well as iterations involving muon antineutrinos and electron antineutrinos. The status and results of various NOvA ND interaction studies will be presented. |
Sunday, April 16, 2023 1:54PM - 2:06PM |
H11.00003: The NOvA Test Beam Program Dalton G Myers The NOvA Test Beam project aims to further the reach of the NOvA oscillation experiment by improving the understanding of detector response, absolute energy scale, and calibration, and the associated systematic uncertainties. The program uses a beam consisting of protons, electrons, muons, charged pions and kaons with 1-3% momentum uncertainty in the 0.5-1.5 GeV/c range and a fully instrumented beamline, designed to make precision measurements of the particle momentum and perform identification, before entering a scaled-down NOvA detector. The beamline provides the a precision momentum measurement and particle identification through the use of a spectrometer magnet, a time of flight system, wire chamber detectors for tracking information, and a threshold Cherenkov detector. These tagged particles subsequently interact in the NOvA detector, facilitating measurements of detector response and a validation of the detector calibration. This in turn would lead to a reduction in some of the largest systematic uncertainties in measurements of neutrino oscillation parameters including Δ??232, ??32, and ??cp increasing the physics reach of NOvA. |
Sunday, April 16, 2023 2:06PM - 2:18PM |
H11.00004: New measurements of neutrino oscillations from the IceCube experiment Shiqi Yu Precise measurements of neutrino oscillations are demonstrated by many experiments using neutrinos from different sources, with the IceCube experiment exploiting its high-statistics atmospheric neutrino data. As a Cherenkov detector instrumented over a cubic kilometer deep under the South Pole ice, IceCube can detect high-energy neutrino emissions from astrophysical sources, while the subdetector (DeepCore) at the lower center of the IceCube array with a denser configuration has improved the ability to see GeV-scale neutrinos. Precise reconstruction is critical to oscillation measurements. Convolutional neural networks (CNNs) are employed to reconstruct neutrino interactions in the DeepCore. In this talk, a preliminary world-leading measurement of the atmospheric muon neutrino disappearance is discussed and compared to the results from the long-baseline experiments. |
Sunday, April 16, 2023 2:18PM - 2:30PM |
H11.00005: Long-baseline Neutrino Oscillation Sensitivity with DUNE Jeremy A Fleishhacker, Christopher Marshall The Deep Underground Neutrino Experiment (DUNE) is a next-generation experiment that will measure neutrino and antineutrino oscillations with a very long baseline in a wideband beam. DUNE will definitively resolve the neutrino mass ordering, and has discovery sensitivity to CP violation over a broad range of possible parameter values. A particular strength of DUNE is the ability to use spectral information to resolve degeneracies between parameters in the three-flavor model, and to test the validity of that model. Neutrino oscillation sensitivities will be presented, with a focus on DUNE's long-term precision measurement capability. |
Sunday, April 16, 2023 2:30PM - 2:42PM |
H11.00006: Electron Neutrino Event Selection at the DUNE Near Detector Eran Moore M Rea This work will present a method for electron neutrino event selection at the DUNE Near Detector. Constraining the electron neutrino to muon neutrino cross section ratio will be an important part of the DUNE neutrino electron neutrino appearance analysis. The Deep Underground Neutrino Experiment (DUNE) will consist of a Near Detector (ND) near the muon neutrino beam source and a Far Detector (FD) 1300 km away. Both detector complexes will include liquid argon time-projection chambers (LArTPC). The ND complex will consist of a 67t fiducial mass of 35 separate modular ArgonCube LArTPCs arranged in a 5 x 7 x 3 m active volume. The ND complex will also include a gaseous argon detector and a beam monitor. The DUNE Precision Reaction-Independent Spectrum Measurement (PRISM)'s oscillation analysis technique is a novel way to do long-baseline neutrino oscillation physics using DUNE's moveable neutrino detector. The DUNE ND LAr and GAr detectors will be on a movable axis perpendicular to the beamline. This moveable ND allows PRISM to find linear combinations of ND muon neutrino fluxes that closely match an oscillated muon neutrino flux at the FD. |
Sunday, April 16, 2023 2:42PM - 2:54PM |
H11.00007: Status of the NDLAr 2x2 prototype for the Deep Underground Neutrino Experiment (DUNE) Karolina Wresilo The Deep Underground Neutrino Experiment (DUNE) is a future-generation, long-baseline neutrino experiment. Crucial to its performance for studying long-baseline oscillation physics is the near detector complex, which will be used to characterise the outgoing neutrino beam. One of DUNE's near detectors, NDLAr, exploits the same nuclear target and operational principles as the far detector, which is critical for constraining systematic uncertainties. Mitigation of high event pileup from the world's most intense neutrino beam will be facilitated by a modularised detector design. NDLAr will also employ state-of-the-art charge and light readout technologies. The novel pixelated charge readout based on LArPix will enable true 3D readout of the events, eliminating ambiguity that arises with conventional wire readout LArTPCs. The collection of scintillation light will be facilitated through two functionally identical, SiPM-based, and complimentary light trapping systems, called Light Collection Modules (LCMs) and ArCLights. which will provide both high light yield and position resolution. This talk will focus on the DUNE NDLAr 2x2, a prototype of NDLAr containing 4 individual LArTPC modules, outlining on the testing and performance up to date as well as physics goals. |
Sunday, April 16, 2023 2:54PM - 3:06PM |
H11.00008: Cryogenic readout electronics and quality assurance in the DUNE experiment Hanjie Liu The Deep Underground Neutrino Experiment (DUNE) will enable a broad exploration of neutrinos physics. It includes potential discovery for charge-parity symmetry violation in neutrino flavor mixing, and the determination of the unknown neutrino mass ordering, among other interesting neutrino sector observables. A high-intensity neutrino beam will be generated at Fermilab, of which the parameters are measured by a near detector. The neutrinos travel about 1.3 km before reaching the far detectors located 1.5 km underground. The far detectors use the LArTPC technology, where each detector is immersed in 17.5 kt liquid argon (LAr) with a temperature kept at 88 K. To achieve its desired performance, low-noise cryogenic electronics are mounted directly on the detector inside the LAr. The low-noise cryogenic electronics have been designed and are tested in the protoDUNEI/II prototypes. During DUNE operation, the cryogenic electronics cannot be accessed or repaired. Therefore, dedicated quality control tests on the cryogenic electronics are necessary. An introduction on the DUNE cryogenic electronics and their quality assurance testing will be presented. |
Sunday, April 16, 2023 3:06PM - 3:18PM |
H11.00009: Search for BSM new physics at neutrino facilities Tao Han We point out the novelty of dark-sector-origin mechanisms giving rise to an anomalous tau neutrino appearance at the near detectors of beam-focused neutrino experiments, without extending the neutrino sector. The charged mesons produced and focused in the target-horn system can decay to a (neutrinophilic) mediator together with a charged lepton and its neutrino counterpart. If such a mediator also couples to hadrons, it can be additionally produced via the bremsstrahlung of the incident proton beam. The mediator subsequently decays to a tau neutrino pair resulting in tau neutrino detection at the near detectors, which is unexpected under the standard three-flavor neutrino model. We show that ICARUS-NuMI, an off-axis near detector of the NuMI beam, as well as DUNE can observe tau neutrino events induced by beam-proton bremsstrahlung. |
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