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CASPER, D; BECKER-SZENDY, R; JONES, T. W; KIELCZEWSKA, D; KROPP, W. R; LEARNED, J. G; LOSECCO, J. M; MCGREW, C; MATSUNO, S; MATTHEWS, J; MUDAN, M. S; PRICE, L; BRATTON, C. B; REINES, F; SCHULTZ, J; SINCLAIR, D; SOBEL, H. W; STONE, J. L; SULAK, L. R; SVOBODA, R; THORNTON, G; VAN DER VELDE, J. C; CADY, D. R; CLAUS, R; DYE, S. T; GAJEWSKI, W; GOLDHABER, M; HAINES, T. J; HALVERSON, P. G
Physical review letters, 05/1991, Letnik: 66, Številka: 20Journal Article
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. (Author)
