Publications by authors named "T Okusawa"
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.
Article Synopsis
- The Higgs boson, crucial for the standard model of particle physics, helps mediate the weak force between elementary particles, and its mass is closely regulated by the model's symmetries.
- Researchers measured the mass of the boson using data from proton-antiproton collisions at the Tevatron collider, accumulating about 4 million candidates to achieve a very precise measurement.
- This new mass measurement shows a significant discrepancy with what is expected from the standard model, suggesting potential gaps in our current understanding of particle physics.
Electron antineutrino appearance is measured by the T2K experiment in an accelerator-produced antineutrino beam, using additional neutrino beam operation to constrain parameters of the Pontecorvo-Maki-Nakagawa-Sakata (PMNS) mixing matrix. T2K observes 15 candidate electron antineutrino events with a background expectation of 9.3 events.
View Article and Find Full Text PDFThe T2K experiment measures muon neutrino disappearance and electron neutrino appearance in accelerator-produced neutrino and antineutrino beams. With an exposure of 14.7(7.
View Article and Find Full Text PDFA search for the exotic meson X(5568) decaying into the B_{s}^{0}π^{±} final state is performed using data corresponding to 9.6 fb^{-1} from pp[over ¯] collisions at sqrt[s]=1960 GeV recorded by the Collider Detector at Fermilab. No evidence for this state is found and an upper limit of 6.
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