Observation of muon neutrino disappearance with the MINOS detectors and the NuMI neutrino beam

2006/07/29 by MINOS Collaboration · 1 citation
Physics and Astronomy · #hep-ex

paper · pdf · doi:10.1103/physrevlett.97.191801

published as Phys.Rev.Lett.97:191801,2006 · To be submitted to PRL. 6 pages, 4 figures

arxiv created 2006/07/29 · arxiv updated 2012/08/27

Abstract

This letter reports results from the MINOS experiment based on its initial exposure to neutrinos from the Fermilab NuMI beam. The rate and energy spectra of charged current muon neutrino interactions are compared in two detectors located along the beam axis at distances of 1 km and 735 km. With 1.27 x 10²⁰ 120 GeV protons incident on the NuMI target, 215 events with energies below 30 GeV are observed at the Far Detector, compared to an expectation of 336 ± 14.4 events. The data are consistent with muon neutrino disappearance via oscillation with |Δm²₂₃| = 2.74^+0.44_-0.26 x 10^-3 eV²/c⁴ and sin²(2θ₂₃) > 0.87 (at 60% C.L.).

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