Search for Lorentz invariance and CPT violation with muon antineutrinos in the MINOS Near Detector
PHYSICAL REVIEW D 85:3 (2012) ARTN 031101
T2K: A LONG-BASELINE EXPERIMENT TO STUDY NEUTRINOS
MODERN PHYSICS LETTERS A 27:17 (2012) ARTN 1230017
Improved search for Muon-neutrino to electron-neutrino oscillations in MINOS.
Phys Rev Lett 107:18 (2011) 181802
Abstract:
We report the results of a search for ν(e) appearance in a ν(μ) beam in the MINOS long-baseline neutrino experiment. With an improved analysis and an increased exposure of 8.2 × 10(20) protons on the NuMI target at Fermilab, we find that 2 sin(2) (θ(23))sin(2)(2θ(13))<0.12(0.20) at 90% confidence level for δ = 0 and the normal (inverted) neutrino mass hierarchy, with a best-fit of 2sin(2) (θ(23))sin(2)(2θ(13)) = 0.041(-0.031)(+0.047) (0.079(-0.053) (+0.071)). The θ(13) = 0 hypothesis is disfavored by the MINOS data at the 89% confidence level.Search for the disappearance of muon antineutrinos in the NuMI neutrino beam
Physical Review D - Particles, Fields, Gravitation and Cosmology 84:7 (2011)
Abstract:
We report constraints on antineutrino oscillation parameters that were obtained by using the two MINOS detectors to measure the 7% muon antineutrino component of the NuMI neutrino beam. In the Far Detector, we select 130 events in the charged-current muon antineutrino sample, compared to a prediction of 136.4±11.7(stat)-8.9+10.2(syst) events under the assumption |Δm̄2|=2.32×10-3eV2, sin2(2θ̄)=1.0. Assuming no oscillations occur at the Near Detector baseline, a fit to the two-flavor oscillation approximation constrains |Δm̄2|<3.37×10-3eV2 at the 90% confidence level with sin2(2θ̄)=1.0. © 2011 American Physical Society.Indication of electron neutrino appearance from an accelerator-produced off-axis muon neutrino beam
Physical Review Letters 107:4 (2011)