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Limits on J ψ and Υ{hooked} production in e+e-interactions at s = 29 GeV

  • Author(s): Matteuzzi, C
  • Abrams, GS
  • Amidei, D
  • Blocker, CA
  • Boyarski, AM
  • Breidenbach, M
  • Burke, DL
  • Chinowsky, W
  • Dieterle, WE
  • Dillon, JB
  • Dorfan, JM
  • Eaton, MW
  • Feldman, GJ
  • Granklin, MEB
  • Gidal, G
  • Gladney, L
  • Gold, MS
  • Goldhaber, G
  • Golding, LJ
  • Hanson, G
  • Hollebeek, RJ
  • Innes, WR
  • Jaros, JA
  • Johnson, AD
  • Kadyk, JA
  • Lankford, AJ
  • Larsen, RR
  • LeClaire, B
  • Levi, M
  • Lockyer, N
  • Lüth, V
  • Nelson, ME
  • Patrick, JF
  • Perl, ML
  • et al.
Abstract

A search has been made for the inclusive production of J ψ (3.1) and Υ{hooked} (9.4) mesons in e+e-interactions at 29 GeV, via their decay into two leptons. No signal is observed in the J ψ region, nor in the Υ{hooked} region. The limits on the cross sections are σ(e+e-→ ψX) < 4.4 × 10-36cm2, and σ(e+e-→ Υ{hooked}X) < 4.7 × 10-36cm2. The same data yield limits on the branching ratios for the b quark BR (b → ψX) < 4.9% and BR (b → ℓ+ℓ-X) < 0.8%. © 1983.

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