0000000000359153

AUTHOR

T. Yamauchi

showing 2 related works from this author

Measurements of the T2K neutrino beam properties using the INGRID on-axis near detector

2012

Precise measurement of neutrino beam direction and intensity was achieved based on a new concept with modularized neutrino detectors. INGRID (Interactive Neutrino GRID) is an on-axis near detector for the T2K long baseline neutrino oscillation experiment. INGRID consists of 16 identical modules arranged in horizontal and vertical arrays around the beam center. The module has a sandwich structure of iron target plates and scintillator trackers. INGRID directly monitors the muon neutrino beam profile center and intensity using the number of observed neutrino events in each module. The neutrino beam direction is measured with accuracy better than 0.4 mrad from the measured profile center. The …

Nuclear and High Energy PhysicsPhysics - Instrumentation and DetectorsNeutrino oscillationPhysics::Instrumentation and DetectorsAstrophysics::High Energy Astrophysical Phenomenaon-axis near detectorFOS: Physical sciencesddc:500.201 natural sciences7. Clean energyNeutrino oscillation; on-axis near detectorneutrino oscillation; neutrino detector; wavelength shifting fiber; t2k; extruded scintillator; neutrino beamNeutrino detectorNuclear physicsNeutrino beamneutrino beam0103 physical sciencesExtruded scintillatorMuon neutrinoneutrino oscillation[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]010306 general physicsNeutrino oscillationInstrumentationT2KPhysicst2k010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyNeutrino oscillation; T2K; Neutrino beam; Neutrino detector; Extruded scintillator; Wavelength shifting fiberT2K experimentextruded scintillatorFísicaInstrumentation and Detectors (physics.ins-det)Neutrino detectorneutrino detectorWavelength shiftingfiberMeasurements of neutrino speedPhysics::Accelerator PhysicsHigh Energy Physics::ExperimentNeutrinoBeam (structure)Leptonwavelength shifting fiber
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First Muon-Neutrino Disappearance Study with an Off-Axis Beam

2012

We report a measurement of muon-neutrino disappearance in the T2K experiment. The 295-km muon-neutrino beam from Tokai to Kamioka is the first implementation of the off-axis technique in a long-baseline neutrino oscillation experiment. With data corresponding to 1.43 × 10(20) protons on target, we observe 31 fully-contained single μ-like ring events in Super-Kamiokande, compared with an expectation of 104 ± 14(syst) events without neutrino oscillations. The best-fit point for two-flavor νμ → ντ oscillations is sin 2(2θ(23)) = 0.98 and |Δm(2)(32)| = 2.65 × 10(−3) eV2. The boundary of the 90% confidence region includes the points (sin2 (2θ(23)), |Δm(2)(32)|) = (1.0, 3.1 × 10(−3) eV2), (0.84, …

Nuclear and High Energy Physics530 PhysicsPhysics::Instrumentation and DetectorsAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesddc:500.27. Clean energy01 natural sciencesNeutrino scatteringHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Muon neutrino010306 general physicsNeutrino oscillationQCPhysics010308 nuclear & particles physicshep-exHigh Energy Physics::PhenomenologyT2K experimentFísicaPhysics::Accelerator PhysicsHigh Energy Physics::ExperimentBeam (structure)
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