Publications by authors named "S Bron"
Measurements of neutrino oscillation parameters from the T2K experiment using protons on target.
Eur Phys J C Part Fields
September 2023
Article Synopsis
- - The T2K experiment reports enhanced measurements of neutrino oscillation parameters through new proton-on-target (POT) neutrino data, significantly improving analysis methods with a major focus on the near detector's new selection procedures.
- - This analysis is the first to utilize data from the NA61/SHINE experiment, helping to refine the neutrino flux model and enhance the neutrino interaction model by incorporating new nuclear effects.
- - Both frequentist and Bayesian approaches indicate a preference for normal mass ordering and a nearly maximal CP-violating phase, with notable exclusions and constraints on certain parameters aligning with past T2K studies.
The origin of high-energy cosmic rays, atomic nuclei that continuously impact Earth's atmosphere, is unknown. Because of deflection by interstellar magnetic fields, cosmic rays produced within the Milky Way arrive at Earth from random directions. However, cosmic rays interact with matter near their sources and during propagation, which produces high-energy neutrinos.
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- A supermassive black hole in the galaxy NGC 1068, hidden by cosmic dust, is believed to power its active core, and neutrinos might help us understand this.
- Researchers analyzed data from the IceCube neutrino detector from 2011 to 2020 to detect neutrinos from various gamma-ray sources, including NGC 1068.
- They discovered an excess of high-energy neutrinos from NGC 1068, indicating a significant connection to the galaxy's activity, and these neutrinos were found to be much more abundant than previously measured gamma rays from the same source.
Article Synopsis
- The study investigates the presence of an unstable sterile neutrino using eight years of atmospheric muon neutrino data collected at the IceCube Neutrino Observatory.
- Results indicate that both traditional three-neutrino models and 3+1 sterile neutrino models are less favored compared to the unstable sterile neutrino model, but no significant evidence for 3+1 neutrinos with decay was found.
- The research provides specific parameters for the unstable sterile neutrino model, while also excluding favored regions of the 3+1 model from prior short-baseline oscillation studies.
We report a search for nonstandard neutrino interactions (NSI) using eight years of TeV-scale atmospheric muon neutrino data from the IceCube Neutrino Observatory. By reconstructing incident energies and zenith angles for atmospheric neutrino events, this analysis presents unified confidence intervals for the NSI parameter ε_{μτ}. The best-fit value is consistent with no NSI at a p value of 25.
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