Publication: Improved Search for Muon-Neutrino to Electron-Neutrino Oscillations in MINOS
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Date
2011
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American Physical Society (APS)
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Citation
Adamson, P., D. J. Auty, D. S. Ayres, C. Backhouse, G. Barr, M. Betancourt, M. Bishai, et al. 2011. “Improved Search for Muon-Neutrino to Electron-Neutrino Oscillations in MINOS.” Physical Review Letters 107 (18) (October). doi:10.1103/physrevlett.107.181802.
Abstract
We report the results of a search for νe appearance in a νμ beam in the MINOS long-baseline neutrino experiment. With an improved analysis and an increased exposure of 8.2×1020 protons on the NuMI target at Fermilab, we find that 2sin2(θ23)sin2(2θ13)<0.12(0.20) at 90% confidence level for δ=0 and the normal (inverted) neutrino mass hierarchy, with a best-fit of 2sin2(θ23)sin2(2θ13)=0.041+0.047−0.031(0.079+0.071−0.053). The θ13=0 hypothesis is disfavored by the MINOS data at the 89% confidence level.
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Keywords
neutrino: mass: hierarchy, MINOS, neutrino: oscillation, neutrino/mu: beam, neutrino/e: particle identification, neutrino: mixing angle, experimental results, Fermilab
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