Search for high-energy tau-neutrino interactions

H. C. Ballagh; H. H. Bingham; T. J. Lawry; G. R. Lynch; J. Lys; M. L. Stevenson; F. R. Huson; E. Schmidt; W. Smart; E. Treadwell; R. J. Cence; F. A. Harris; M. D. Jones; A. Koide; S. I. Parker; M. W. Peters; V. Z. Peterson; H. J. Lubatti; K. Moriyasu; E. Wolin; D. Gee

doi:10.1103/PhysRevD.30.2271

Search for high-energy tau-neutrino interactions

H. C. Ballagh, H. H. Bingham, T. J. Lawry, G. R. Lynch, J. Lys, M. L. Stevenson, F. R. Huson, E. Schmidt, W. Smart, E. Treadwell, R. J. Cence, F. A. Harris, M. D. Jones, A. Koide, S. I. Parker, M. W. Peters, V. Z. Peterson, H. J. Lubatti, K. Moriyasu, E. Wolin, and D. Gee

Phys. Rev. D 30, 2271 – Published 1 December 1984

Abstract

Kinematic selection criteria are developed for separating tau-neutrino charged-current interactions from a large background of muon- and electron-neutrino interactions. The criteria are designed to detect the three-prong decay mode of the $τ$ lepton and rely on the three-particle combination's transverse momentum being anticorrelated with the tránsverse momentum of the other visible particles and being correlated with the missing transverse momentum. The criteria are applied to a sample of events from an exposure of the Fermilab 15-ft bubble chamber to the quadrupole triplet neutrino beam. The average event energies for this beam are 90 GeV for neutrino and 60 GeV for antineutrino events. The $14 τ$ candidates selected agree with the calculated background of 14.3±1.2. An upper limit on the probability of muon neutrinos oscillating into tau neutrinos of 0.053 is obtained.

Received 25 May 1984

DOI:https://doi.org/10.1103/PhysRevD.30.2271

Authors & Affiliations

H. C. Ballagh, H. H. Bingham, T. J. Lawry, G. R. Lynch, J. Lys^*, and M. L. Stevenson

Department of Physics and Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720

F. R. Huson, E. Schmidt, W. Smart, and E. Treadwell

Fermi National Accelerator Laboratory, Batavia, Illinois 60510

R. J. Cence, F. A. Harris, M. D. Jones, A. Koide, S. I. Parker, M. W. Peters, and V. Z. Peterson

Department of Physics, University of Hawaii at Manoa, Honolulu, Hawaii 96822

H. J. Lubatti, K. Moriyasu^†, and E. Wolin^‡

Visual Techniques Laboratory, Department of Physics, University of Washington, Seattle, Washington 98195

D. Gee

Department of Physics, University of Wisconsin, Madison, Wisconsin 53706

^*Also at Dept. of Physics, University of Hawaii, Honolulu, Hawaii 96822.
^†Present address: Arete Associates, Encino, California 91316.
^‡Present address: Physics Dept., Yale University, New Haven, Connecticut 06511.

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Vol. 30, Iss. 11 — 1 December 1984

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Physical Review D

covering particles, fields, gravitation, and cosmology