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Measurements of branching fractions and decay amplitudes in B→J/ψK∗B \to J/\psi K^{*} decays

Collaboration
•
May, 2002
17 pages
Published in:
  • Phys.Lett.B 538 (2002) 11-20
e-Print:
DOI:
Report number:
  • KEK-PREPRINT-2002-17,
  • BELLE-PREPRINT-2002-11
Experiments:
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Abstract: (Elsevier)
The branching fractions and the decay amplitudes of B→J/ψK ∗ decays are measured in a 29.4 fb −1 data sample collected with the Belle detector at the KEKB electron–positron collider. The decay amplitudes of helicity states of the J/ψK ∗ system are determined from the full angular distribution of the final state particles in the transversity basis. The branching fractions are measured to be (1.29±0.05±0.13)×10 −3 for neutral mesons and (1.28±0.07±0.14)×10 −3 for charged mesons. The measured longitudinal and transverse (perpendicular to the transversity plane) amplitudes are | A 0 | 2 =0.62±0.02±0.03 and | A ⊥ | 2 =0.19±0.02±0.03, respectively. The value of | A ⊥ | 2 shows that the CP even component dominates in the B 0 →J/ψK ∗0 (K S π 0 ) decay.
Note:
  • 17 pages, 3 figures, 5 tables, to appear in Phys. Lett. B Report-no: KEK Preprint 2002-17, Belle Preprint 2002-11
  • 13.25.Hq
  • 14.40.Nd
  • electron positron: colliding beams
  • electron positron: annihilation
  • Upsilon(10570): electroproduction
  • B: pair production
  • B: hadronic decay
  • J/psi(3100)
  • K*(892)
  • mass spectrum: (K pi)