Determination of the number of J/ψJ/\psi events with inclusive J/ψJ/\psi decays

Jul 4, 2016
10 pages
Published in:
  • Chin.Phys.C 41 (2017) 1, 013001
  • Published: Jan 12, 2017
e-Print:
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Abstract: (IOP)
A measurement of the number of J/ψ events collected with the BESIII detector in 2009 and 2012 is performed using inclusive decays of the J/ψ. The number of J/ψ events taken in 2009 is recalculated to be (223.7 ± 1.4) × 10(6), which is in good agreement with the previous measurement, but with significantly improved precision due to improvements in the BESIII software. The number of J/ψ events taken in 2012 is determined to be (1086.9 ± 6.0) × 10(6). In total, the number of J/ψ events collected with the BESIII detector is measured to be (1310.6 ± 7.0) × 10(6), where the uncertainty is dominated by systematic effects and the statistical uncertainty is negligible.
Note:
  • 10 pages, 6 figures
  • electron positron: annihilation
  • electron positron: colliding beams
  • J/psi(3100): electroproduction
  • J/psi(3100): decay
  • electron: pair production
  • muon: pair production
  • BES
  • Beijing Stor
  • programming
  • statistical