Observation of a resonance-like structure in the pi^+- psi' mass distribution in exclusive B-->K pi^+- psi' decays
| dc.creator | Belle Collaboration | |
| dc.creator | Choi, S. -K. | |
| dc.creator | Olsen, S. L. | |
| dc.date | 2007-08-14 | |
| dc.date | 2007-10-23 | |
| dc.date.accessioned | 2026-07-07T11:52:56Z | |
| dc.date.available | 2026-07-07T11:52:56Z | |
| dc.description | A distinct peak is observed in the pi^+/- psi' invariant mass distribution near 4.43 GeV in B->K pi^+/- psi' decays. A fit using a Breit Wigner resonance shape yields a peak mass and width of 4433+-4(stat)+-2(syst) MeV and Gamma = 45^+18_-13(stat) ^+30_-13 MeV. The product branching fraction is determined to be Bf(B-->KZ(4430))xBf(Z(4430)-->pi^+psi') = (4.1+-1.0(stat)+-1.4(syst))x10^{-5), where Z(4430) is used to denote the observed structure. The statistical significance of the observed peak is 6.5sigma. These results are obtained from a 605 fb-1 data sample that contains 657 million BBbar pairs collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. | |
| dc.description | 10 pages, 3 figures, a 2007 Lepton-Photon Symposium submission is modified and submitted to PRL | |
| dc.identifier | https://arxiv.org/abs/0708.1790 | |
| dc.identifier | http://arxiv.org/abs/0708.1790 | |
| dc.identifier | Phys.Rev.Lett.100:142001,2008 | |
| dc.identifier | doi:10.1103/PhysRevLett.100.142001 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/204358 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Observation of a resonance-like structure in the pi^+- psi' mass distribution in exclusive B-->K pi^+- psi' decays | |
| dc.type | text |