Measurements of inclusive BψB \to \psi production

Collaboration
Jul, 2002
5 pages
Published in:
  • Phys.Rev.Lett. 89 (2002) 282001
e-Print:
Report number:
  • CLNS-02-1785,
  • CLEO-02-06
Experiments:

Citations per year

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Abstract:
Using the combined CLEO II and CLEO II.V data sets of 9.1 fb^{-1} at the Upsilon(4S), we measure properties of Psi mesons produced directly from decays of the B meson, where ``B'' denotes an admixture of B+, B-, B0, and B0bar, and ``Psi'' denotes either J/Psi or Psi(2S). We report first measurements of Psi polarization in B -> Psi(direct) X: alpha(J/Psi) = -0.30 {+0.07 -0.06 stat} {+-0.04 syst} and alpha(Psi(2S)) = -0.45 {+0.22 -0.19 stat} {+-0.04 syst}. We also report improved measurements of the momentum distributions of Psi produced directly from B decays, correcting for measurement smearing. Finally, we report measurements of the inclusive branching fraction for B -> Psi X and B -> Chi_c1 X.
  • electron positron: colliding beams
  • electron positron: annihilation
  • Upsilon(10570): electroproduction
  • B: pair production
  • B: hadronic decay
  • psi mesons: polarization
  • psi mesons: momentum spectrum
  • J/psi(3100)
  • psi(3685)
  • angular distribution