Measurement of atmospheric neutrino composition with the IMB-3 detector

Details Measurement of atmospheric neutrino composition with the IMB-3 detector Measurement of atmospheric neutrino composition with the IMB-3 detector

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvl..66.2561c&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 66, May 20, 1991, p. 2561-2564. DOE-supported research.

Physics

323

Cerenkov Radiation, Cosmic Ray Showers, Earth Atmosphere, Neutrinos, Radiation Detectors, Computerized Simulation, Energy Spectra, Leptons, Monte Carlo Method, Particle Interactions, Visible Spectrum

Scientific paper

The atmospheric neutrino flux is measured using a 3.4-kt yr exposure of the IMB-3 detector. Single-ring events are classified as showering or nonshowering using the geometry of the Cerenkov pattern. A simulation of neutrino interactions and three models of atmospheric neutrino production are used to predict the composition of the sample. The showering-nonshowering character is strongly correlated with the flavor of the neutrino parent. In the lepton momentum range of p less than 1500 MeV/c, it is found that nonshowering events comprise /41 + or - 3(stat) + or - 2(syst)/ percent of the total. The fraction expected is /51 + or - 5(syst)/ percent.

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