Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-11-04
Phys.Rev.D77:054001,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 5 figures. Published version
Scientific paper
10.1103/PhysRevD.77.054001
Recently, Belle Collaboration has reported a resonant state produced in $B\to K \pi\psi'$, 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 $\bar B^0\to Z_s^-\pi^+\to K^-\psi'\pi^+$ and $B^-\to \bar Z_s^0 \pi^-\to K_S\psi'\pi^-$ decay channels, favored by Cabibbo-Kobayashi-Maskawa (CKM) matrix elements, can have branching ratios of ${\cal O}(10^{-5})$. This large branching ratio could be observed at the running $B$ factories to detect $Z_s$ particles containing a strange quark. We also predict large branching ratios of the $Z$ and $Z_c$ ($\bar cc\bar c D, D=u,d,s$) particle production rates in non-leptonic $B_c$ decays and radiative B decays. Measurements of these decays at the ongoing $B$ factories and the forthcoming Large Hadron Collider (LHC)-b experiments are helpful to clarify the mysterious $Z$ particles.
Li Ying
Lu Cai-Dian
Wang Wei
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