Search for the anomalous production of single photons in e+e annihilation at √s =29 GeV

C. Hearty, J. E. Rothberg, K. K. Young, A. S. Johnson, J. S. Whitaker, R. J. Wilson, G. Bartha, D. L. Burke, P. Extermann, P. H. Garbincius, C. A. Hawkins, M. J. Jonker, L. Keller, C. Matteuzzi, N. A. Roe, T. R. Steele, and R. J. Hollebeek
Phys. Rev. D 39, 3207 – Published 1 June 1989
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Abstract

This paper reports results of a search for production by radiative e+e annihilation of particles that interact only weakly in matter. The search has been made in a data set corresponding to 110 pb1 acquired with the ASP detector at the Stanford Linear Accelerator Center storage ring PEP (√s =29 GeV). No anomalous signal has been observed, which limits the number of generations of light neutrinos to be Nν<7.9 (at 90% C.L.). Limits are also placed on the masses of particles predicted to exist by models of supersymmetry.

  • Received 14 September 1988

DOI:https://doi.org/10.1103/PhysRevD.39.3207

©1989 American Physical Society

Authors & Affiliations

C. Hearty, J. E. Rothberg, and K. K. Young

  • Department of Physics, University of Washington, Seattle, Washington 98195

A. S. Johnson, J. S. Whitaker, and R. J. Wilson

  • Department of Physics, Boston University, Boston, Massachusetts 02215

G. Bartha, D. L. Burke, P. Extermann, P. H. Garbincius, C. A. Hawkins, M. J. Jonker, L. Keller, C. Matteuzzi, N. A. Roe, and T. R. Steele

  • Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309

R. J. Hollebeek

  • Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104

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Vol. 39, Iss. 11 — 1 June 1989

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