Phys. Rev. Lett. 79, 345 - 348 (1997)Atmospheric Muon Neutrino Fraction above 1 GeV |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1984: |
R. Clark1, R. Becker-Szendy2, C. B. Bratton3, J. Breault4, D. Casper5, S. T. Dye6, W. Gajewski4, M. Goldhaber7, T. J. Haines8, P. G. Halverson4, D. Kielczewska9, W. R. Kropp4, J. G. Learned10, J. LoSecco11, C. McGrew12, S. Matsuno10, R. S. Miller8, L. Price4, F. Reines4, J. Schultz4, H. W. Sobel4, J. Stone13, L. R. Sulak13, R. Svoboda1, and M. Vagins4
1Louisiana State University, Baton Rouge, Louisiana 70803
2Stanford Linear Accelerator Center, Stanford, California 94309
3Cleveland State University, Cleveland, Ohio 44115
4The University of California, Irvine, California 92717
5CERN, Geneva, Switzerland
6Hawaii Pacific University, Honolulu, Hawaii, 96813
7Brookhaven National Laboratory, Upton, New York 11973
8Los Alamos National Laboratory, Los Alamos, New Mexico 87544
9Warsaw University, Warsaw, Poland
10The University of Hawaii, Honolulu, Hawaii 96822
11The University of Notre Dame, Notre Dame, Indiana 46556
12SUNY at Stoney Brook, Stony Brook, New York 11794
13Boston University, Boston, Massachusetts 02215
See Also: Erratum
Received 12 February 1997
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 (muonlike / total)Data/(muonlike / total)MC was found to be 1.1-0.12+0.07(stat)±0.11(syst). The zenith angle dependence of this ratio of ratios is consistent with being flat. The region of sin2(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 sin2(2θ)>0.7 and δm2>1.5×10-2 eV2 has been excluded to the 90% confidence level for νμ→ντ oscillations.
©1997 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v79/p345
DOI: 10.1103/PhysRevLett.79.345
PACS: 14.60.Pq, 96.40.Tv
See Also
Erratum: R. Clark et al., Atmospheric Muon Neutrino Fraction above 1 GeV [Phys. Rev. Lett. 79, 345 (1997)], Phys. Rev. Lett. 79, 2754 (1997)
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