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Measurement of the branching fraction for -5(0) and an upper limit on the mass

  • Author(s): Burchat, PR
  • Schmidke, WB
  • Yelton, JM
  • Abrams, G
  • Amidei, D
  • Baden, AR
  • Barklow, T
  • Boyarski, AM
  • Boyer, J
  • Breidenbach, M
  • Burke, DL
  • Butler, F
  • Dorfan, JM
  • Feldman, GJ
  • Gidal, G
  • Gladney, L
  • Gold, MS
  • Goldhaber, G
  • Golding, L
  • Haggerty, J
  • Hanson, G
  • Hayes, K
  • Herrup, D
  • Hollebeek, RJ
  • Innes, WR
  • Jaros, JA
  • Juricic, I
  • Kadyk, JA
  • Karlen, D
  • Lankford, AJ
  • Larsen, RR
  • Leclaire, BW
  • et al.

The branching fraction for -5(0) is measured from data accumulated with the Mark II detector at PEP. Four events are observed with an estimated hadronic background of (0.03-0.02+0.04) events and a background from -30 of (0.05-0.04+0.07) events. This results in a measured branching fraction of ( The candidate events are used to establish an upper limit of 125 MeV/c2 on the mass at the 95% confidence level. © 1985 The American Physical Society.

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