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Author: Maury Goodman, for the Soudan 2 collaboration(Argonne National Laboratory)

Title: Atmospheric Neutrinos in Soudan 2

Abstract: Soudan 2 has measured the atmospheric neutrino flavor ratio with4.2 fiducial kiloton-years of exposure. It measures a flavorratio of $0.66 \pm 0.11(stat)$, inconsistent with the expectedratio but consistent with the hypothesis of neutrino oscillationsand the Super-Kamiokande data. In a sample of events with goodangular resolution, fits to the L/E distribution suggest that$\Delta m^2 > 10^{-3}eV^2$.

Comments: 6 pages, 4 figuresReport-no: PDK-719


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