Limits on neutrino oscillations from <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mover><mrow><mi>ν</mi></mrow><mrow><mi>¯</mi></mrow></mover><mrow><mi>e</mi></mrow></msub></mrow></math></span> appearance

S. J. Freedman; B. K. Fujikawa; J. Napolitano; J. E. Nelson; R. D. McKeown; K. T. Lesko; J. B. Donahue; G. T. Garvey; V. D. Sandberg; W. C. Choi; A. Fazely; R. L. Imlay; W. J. Metcalf; L. S. Durkin; R. W. Harper; T. Y. Ling; J. W. Mitchell; T. A. Romanowski; E. S. Smith; M. Timko

doi:10.1103/PhysRevD.47.811

Limits on neutrino oscillations from ${\bar{ν}}_{e}$ appearance

S. J. Freedman, B. K. Fujikawa, J. Napolitano, J. E. Nelson, R. D. McKeown, K. T. Lesko, J. B. Donahue, G. T. Garvey, V. D. Sandberg, W. C. Choi, A. Fazely, R. L. Imlay, W. J. Metcalf, L. S. Durkin, R. W. Harper, T. Y. Ling, J. W. Mitchell, T. A. Romanowski, E. S. Smith, and M. Timko

Phys. Rev. D 47, 811 – Published 1 February 1993

Abstract

A 20-ton neutrino detector located near the Los Alamos Meson Physics Facility beam stop is used search for ${\bar{ν}}_{e}$ generated via neutrino oscillations from any of the three neutrino types, $ν_{μ}$ , ${\bar{ν}}_{μ}$ , and $ν_{e}$ , which radiate from the beam stop. The analysis of three years of data provides limits on the oscillation modes ${\bar{ν}}_{μ} \to {\bar{ν}}_{e}$ , $ν_{e} \to {\bar{ν}}_{e}$ , and $ν_{μ} \to {\bar{ν}}_{e}$ , and the lepton-number-violating decay process $μ^{+} \to e^{+} + {\bar{ν}}_{e} + ν_{μ}$ . The 90%-confidence-level limits for ${\bar{ν}}_{μ} \to {\bar{ν}}_{e}$ oscillations are $δ m^{2} \leq 0.14$ e $V^{2}$ for maximal mixing, and ${sin}^{2} 2 θ \leq 0.024$ for large $δ m^{2}$ .

Received 22 July 1992

DOI:https://doi.org/10.1103/PhysRevD.47.811

Authors & Affiliations

S. J. Freedman^*, B. K. Fujikawa^*, J. Napolitano^†, and J. E. Nelson

Argonne National Laboratory, Argonne, Illinois 60439

R. D. McKeown

California Institute of Technology, Pasadena, California 91125

K. T. Lesko

Lawrence Berkeley Laboratory, Berkeley, California 94720

J. B. Donahue, G. T. Garvey, and V. D. Sandberg

Los Alamos National Laboratory, Los Alamos, New Mexico 87545

W. C. Choi^‡, A. Fazely^§, R. L. Imlay, and W. J. Metcalf

Louisiana State University, Baton Rouge, Louisiana 70803

L. S. Durkin, R. W. Harper^∥, T. Y. Ling, J. W. Mitchell^¶, T. A. Romanowski, E. S. Smith^¶, and M. Timko^**

The Ohio State University, Columbus Ohio 43210

^*Present address: Physics Department and Lawrence Berkeley Laboratory, University of California, Berkeley, CA 94720.
^†Present address: Rensselaer Polytechnic Institute, Troy, NY 12180-3590.
^‡Present address: University of Alberta, Edmonton, Alberta, Canada T6G 2J1.
^§Present address: Southern University, Baton Rouge, LA 70813.
^∥Present address: EG&G, Los Alamos, NM 87544.
^¶Present address: McGill University, Montreal, Quebec, Canada H3A2T8.
^**Present address: Tufts University, Medford, MA 02155.

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Vol. 47, Iss. 3 — 1 February 1993

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Physical Review D

covering particles, fields, gravitation, and cosmology