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Study of B→ψ2SKB \to \psi_{2S} K and B→ψ2SB \to \psi_{2S} K*(892) decays

Collaboration
•
Oct, 2000
10 pages
Published in:
  • Phys.Rev.D 63 (2001) 031103
e-Print:
DOI:
Report number:
  • SLAC-REPRINT-2000-076,
  • CLNS-00-1688,
  • CLEO-00-17
Experiments:
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Abstract: (arXiv)
Color-suppressed decays of BB mesons to final states with ψ(2S)\psi(2S) mesons have been observed with the CLEO detector. The branching fractions for the decays B+→ψ(2S)K+B^+ \to \psi(2S) K^+, B+→ψ(2S)K∗(892)+B^+ \to \psi(2S) K^*(892)^+, B0→ψ(2S)K0B^0 \to \psi(2S) K^0, and B0→ψ(2S)K∗(892)0B^0 \to \psi(2S) K^*(892)^0 are measured to be (7.8 +- 0.7 +- 0.9) 10^{-4},(9.2+−1.9+−1.2)10−4, (9.2 +- 1.9 +- 1.2) 10^{-4}, (5.0 +- 1.1 +- 0.6) 10^{-4},and(7.6+−1.1+−1.0)10−4, and (7.6 +- 1.1 +- 1.0) 10^{-4}, respectively, where the first uncertainty is statistical and the second is systematic. The first measurement of the longitudinal polarization fraction is extracted from the angular analysis of the B→ψ(2S)K∗(892)B \to \psi(2S) K^*(892) candidates: ΓL/Γ=0.45+−0.11+−0.04\Gamma_L / \Gamma = 0.45 +- 0.11 +- 0.04 . Our measurements of the decays B0→ψ(2S)K0B^0 \to \psi(2S) K^0 and B+→ψ(2S)K∗(892)+B^+ \to \psi(2S) K^*(892)^+ are first observations.
  • electron positron: colliding beams
  • electron positron: annihilation
  • Upsilon(10570): electroproduction
  • B: pair production
  • B: hadronic decay
  • B+: branching ratio
  • B0: branching ratio
  • helicity: angular dependence
  • polarization: longitudinal
  • psi(3685)