Dalitz analysis of B ---> K pi+ psi-prime decays and the Z(4430)+
May, 20097 pages
Published in:
- Phys.Rev.D 80 (2009) 031104
e-Print:
- 0905.2869 [hep-ex]
Report number:
- BELLE-PREPRINT-2009-9
Experiments:
View in:
Citations per year
Abstract: (arXiv)
From a Dalitz plot analysis of B --> K pi psi' decays, we find a signal for Z(4430)+ --> pi+ psi' with a mass M= (4443(+15-12)(+19-13))MeV/c^2, width Gamma= (107(+86-43)(+74-56))MeV, product branching fraction BR(B0 --> K- Z(4430)+) x BR(Z(4430)+ --> pi+ psi')= (3.2(+1.8-0.9)(+5.3-1.6)) x 10^{-5}, and significance of 6.4sigma that agrees with previous Belle measurements based on the same data sample. In addition, we determine the branching fraction BR(B^0 --> K*(892)^0 psi')= (5.52(+0.35-0.32)(+0.53-0.58)) x 10^{-4} and the fraction of K*(892)^0 mesons that are longitudinally polarized f_L= 44.8(+4.0-2.7)(+4.0-5.3)%. These results are obtained from a 605fb^{-1} data sample that contains 657 million B-anti-B pairs collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider.Note:
- Submitted to PRD(RC)
- 12.39.Mk
- 14.40.Gx
- 13.25.Hw
- electron positron: annihilation
- B: pair production
- B: hadronic decay
- psi(3685)
- Dalitz plot
- Z(4430): intermediate state
- mass: width
References(9)
Figures(6)