Bulletin of the American Physical Society
89th Annual Meeting of the Southeastern Section of the APS
Volume 67, Number 18
Thursday–Saturday, November 3–5, 2022; University of Mississippi, University, MS
Session H01: Neutrino Physics |
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Chair: Jason Fry, Eastern Kentucky University Room: University of Mississippi Ballroom A |
Friday, November 4, 2022 8:30AM - 9:00AM |
H01.00001: The Search for Sterile Neutrinos with the SBN Experiment at Fermilab Invited Speaker: Biswaranjan Behera The main goal of the Short Baseline Neutrino (SBN) program is to address observed anomalies that may originate from short baseline neutrino oscillations and to search for evidence of the existence of light sterile neutrinos with unprecedented sensitivity in the eV^2 mass range. Within the SBN program, the near detector (SBND) is positioned closest to the source, the intermediate detector is MicroBooNE and the far detector is ICARUS. All three detectors are exposed to the on-axis Booster Neutrino Beam (BNB). In this talk, I will focus on the status of the SBND and ICARUS detectors and describe how the SBN program can help resolve the long-standing neutrino anomaly that can be explained by the existence of a new, non-interacting, "sterile" neutrino. |
Friday, November 4, 2022 9:00AM - 9:30AM |
H01.00002: The Cabibbo angle anomaly highlights sterile neutrinos Invited Speaker: Kohsaku Tobioka The mixing angle of the quark sectors are constrained by the unitarity in the standard model. However, the recent data indicates the deviation from the unitarity in the mixing angle between 1st and 2nd generation down-type quarks, which is known as the Cabibbo angle anomaly. The observations include the charged-current weak decays of neutron, nuclei, kaon, and the hadronic decay of tau-lepton. Althogh this seems to be an anomaly in the quark sector, the modiffication of the neutrino sector may ameliorate the tension because all the observations involve neutrinos. We find a sterile neutrino of MeV mass is the most reasonable scenario. The current bounds and future prospect of this scenario are also discusssed. |
Friday, November 4, 2022 9:30AM - 10:00AM |
H01.00003: Recent results of the MicroBooNE experiment Invited Speaker: Hanyu Wei The MicroBooNE detector is the world's longest-running liquid argon time projection chamber (LArTPC), recording neutrinos from both the Booster Neutrino Beam (BNB) and the Neutrinos at the Main Injector beam (NuMI) at Fermilab. The MicroBooNE collaboration recently released a series of measurements aimed at investigating the nature of the excess of low-energy electromagnetic shower events observed by the MiniBooNE collaboration. In this talk, we will present the latest results from a series of three independent analyses looking for an anomalous excess of electron neutrino events, as well as a search for excessive single photons from neutrino-induced resonant decays. We additionally will highlight new results that use the well-understood selections to perform a search for an eV scale sterile neutrino in the full 3+1 oscillation framework. As part of the enriched physics topics of MicroBooNE, several recent cross-section measurements of neutrino-argon scattering and new physics searches will also be presented. |
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