Atmospheric Muon Neutrino Fraction above 1 GeV
Journal Article
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· Physical Review Letters
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- Louisiana State University, Baton Rouge, Louisiana 70803 (United States)
- Stanford Linear Accelerator Center, Stanford, California 94309 (United States)
- Cleveland State University, Cleveland, Ohio 44115 (United States)
- The University of California, Irvine, California 92717 (United States)
- CERN, Geneva (Switzerland)
- Hawaii Pacific University, Honolulu, Hawaii 96813 (United States)
- Brookhaven National Laboratory, Upton, New York 11973 (United States)
- Los Alamos National Laboratory, Los Alamos, New Mexico 87544 (United States)
- Warsaw University, Warsaw (Poland)
- The University of Hawaii, Honolulu, Hawaii 96822 (United States)
- The University of Notre Dame, Notre Dame, Indiana 46556 (United States)
- SUNY at Stony Brook, Stony Brook, New York 11794 (United States)
- Boston University, Boston, Massachusetts 02215 (United States)
A 2.1 ktonyr 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 0.95GeV of visible {hacek C}erenkov energy. The ratio of these two ratios ((muon li ke)/(tot al)){sub Data}/( (muonl i ke)/(tot al)){sub MC} was found to be 1.1{sup +0.07}{sub {minus}0.12}(stat) {plus_minus}0.11(syst) . The zenith angle dependence of this ratio of ratios is consistent with being flat. The region of sin{sup 2}(2{theta} ){gt}0.5 and {delta}m{sup 2}{gt}9.8{times}10{sup {minus}3} eV{sup 2} has been excluded to the 90{percent} confidence level for {nu}{sub {mu}}{r_arrow}{nu}{sub e} oscillations while the region of sin{sup 2}(2{theta} ){gt}0.7 and {delta}m{sup 2}{gt}1.5{times}10{sup {minus}2} eV{sup 2} has been excluded to the 90{percent} confidence level for {nu}{sub {mu}}{r_arrow}{nu}{sub {tau}} oscillations. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 527025
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 3 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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