literature
Literature
Authors
Jobs
Seminars
Conferences
DataBETA

First evidence of ψ(2S)→Ω−Ω+∗ \psi(2S) \to \Omega^- \Omega^{+*}

Collaboration
•
2012
6 pages
Published in:
  • Chin.Phys.C 36 (2012) 1040-1045
DOI:
Experiments:
reference search4 citations

Citations per year

2013201620192022202310
Abstract: (IOP)
The decay ψ(2S)→Ω−Ω+ \psi(2S) \to \Omega^- \Omega^{+} is analyzed using 14 x 106ψ10^6 \psi (2S) events recorded by the Beijing Spectrometer II (BES II) at the Beijing Electron Positron Collider (BEPC). Based upon events with no missing charged tracks and a satisfactory four-constraint kinematic fit, we determine the upper limit for the branching fraction of ψ(2S)→Ω−Ω+ \psi(2S) \to \Omega^- \Omega^{+} to be 1.5 Oe 10−410^{-4} at a 90% confidence level. By including events with one missing charged track, we are able to report the first evidence of an Ω−Ω+\Omega^- \Omega^+ signal with a statistical significance of 3.1σ\sigma. The branching fraction of ψ(2S)→Ω−Ω+\psi (2S) \to \Omega^- \Omega^+ is determined to be (4.80±1.56(stat)±1.30(sys))x10−5{\pm}1.56(stat){\pm}1.30(sys))x 10^{-5}.
  • psi(3685): branching ratio
  • psi(3685): hadronic decay
  • tracks
  • electron positron
  • Beijing Stor
  • spectrometer
  • BES