First muon-neutrino disappearance study with an off-axis beam
. (2012) First muon-neutrino disappearance study with an off-axis beam. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.85 (No.3). 031103. ISSN 1550-7998 Full text not available from this repository.
Official URL: http://dx.doi.org/10.1103/PhysRevD.85.031103
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 1.43×1020 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 ν μ→ν τ oscillations is sin2(2θ 23)=0.98 and |Δm322|=2.65×10 -3eV2. The boundary of the 90% confidence region includes the points ( sin2(2θ 23), |Δm322|)=(1.0,3.1×10 -3eV2), (0.84, 2.65×10 -3eV2) and (1.0, 2.2×10 -3eV2). © 2012 American Physical Society.
|Item Type:||Journal Article|
|Subjects:||Q Science > QC Physics|
|Divisions:||Faculty of Science > Physics|
|Journal or Publication Title:||Physical Review D (Particles, Fields, Gravitation and Cosmology)|
|Publisher:||American Physical Society|
|Date:||22 February 2012|
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