Atmospheric Muon Neutrino Fraction above 1 GeV

Details Atmospheric Muon Neutrino Fraction above 1 GeV Atmospheric Muon Neutrino Fraction above 1 GeV

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997phrvl..79..345c&link_type=abstract

Physical Review Letters, Volume 79, Issue 3, July 21, 1997, pp.345-348

Physics

19

Scientific paper

A 2.1 kton yr exposure of data from the Irvine-Michigan-Brookhaven detector has yielded 72 atmospheric neutrino events with a vertex contained inside the fiducial volume and at least 0.95 GeV of visible Čerenkov energy. The ratio of these two ratios \(muonliketotal\)Data/\(muonliketotal\)MC was found to be 1.1+0.07-0.12\(stat\)+/-0.11\(syst\). The zenith angle dependence of this ratio of ratios is consistent with being flat. The region of 2\(2θ\)>0.5 and δm2>9.8×10-3 eV2 has been excluded to the 90% confidence level for νμ-->νe oscillations while the region of 2\(2θ\)>0.7 and δm2>1.5×10-2 eV2 has been excluded to the 90% confidence level for νμ-->ντ oscillations.

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