2007/11/30 by Ying Li, Cai-Dian Lü, Wei Wang · 4 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.77.054001
published as Phys.Rev.D77:054001,2008 · 12 pages, 5 figures. Published version
openalex publication_date 2008/03/03 · arxiv created 2008/03/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Recently, the Belle Collaboration has reported a resonant state produced in B\ensuremath→K\ensuremathπ\ensuremathψ^\ensuremath', which is called Z(4430). This state is charged, so it can not be interpreted as an ordinary charmonium state. In this paper, we analyze the octet to which this particle belongs and predict the masses of mesons in this octet. Utilizing flavor SU(3) symmetry, we study production rates in several kinds of B decays. The B0\ensuremath→Zs^\ensuremath-\ensuremathπ+\ensuremath→K^\ensuremath-\ensuremathψ^\ensuremath'\ensuremathπ+ and B^\ensuremath-\ensuremath→Zs0\ensuremathπ^\ensuremath-\ensuremath→KS\ensuremathψ^\ensuremath'\ensuremathπ^\ensuremath- decay channels, favored by Cabibbo-Kobayashi-Maskawa matrix elements, can have branching ratios of O(10^\ensuremath-5). This large branching ratio could be observed at the running B factories to detect Zs particles containing a strange quark. We also predict large branching ratios of the Z and Zc (cccD, D=u, d, s) particle production rates in nonleptonic Bc decays and radiative B decays. Measurements of these decays at the ongoing B factories and the forthcoming Large Hadron Collider-b experiments are helpful to clarify the mysterious Z particles.