Measurement of atmospheric neutrino composition with the IMB-3 detector

Journal Article · Mon May 20 00:00:00 EDT 1991 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.66.2561· OSTI ID:5679466

Casper, D; Becker-Szendy, R; Bratton, C B; Cady, D R; Claus, R; Dye, S T; Gajewski, W; Goldhaber, M; Haines, T J; Halverson, P G; 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 ; Reines, F; Schultz, J; Sinclair, D; Sobel, H W; Stone, J L; Sulak, L R; Svoboda, R; Thornton, G; van der Velde, J C ^[1]

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1. The University of California, Irvine, Irvine, California 92717 (US) The University of Michigan, Ann Arbor, Michigan 48109 Brookhaven National Laboratory, Upton, New York 11973 Boston University, Boston, Massachusetts 02215 The University of Hawaii, Honolulu, Hawaii 96822 University College, London, WC1E F6BT, United Kingdom Warsaw University, Warsaw, Poland Cleveland State University, Cleveland, Ohio 44115 The University of Notre Dame, Notre Dame, Indiana 46556 Lousiana State University, Baton Rouge, Lousisiana 70803 The University of Maryland, College Park, Maryland 20742

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 {hacek C}erenkov pattern. A simulation of neutrino interactions and three models of atmospheric neutrino production are used to predict the composition of the sample. Showering-nonshowering character is strongly correlated with the flavor of the neutrino parent. In the lepton momentum range {ital p}{lt}1500 MeV/{ital c}, we find that nonshowering events comprise (41{plus minus}3{plus minus}2syst)% of the total. The fraction expected is (51{plus minus}5(syst))%.

• OSTI ID: 5679466
• Journal Information: Physical Review Letters; (USA), Vol. 66:20; ISSN 0031-9007
• Country of Publication: United States
• Language: English

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