Observation of $K^{\ast }(892{)}^0{\bar{K}}^{\ast }(892{)}^0$ in ${\chi }_{cJ}$ Decays

Abstract

$K^{\ast }(892{)}^0{\bar{K}}^{\ast }(892{)}^0$ signals from ${\chi }_{cJ}(J=0,1,2)$ decays are observed for the first time using a data sample of 14 million $\psi (2S)$ events accumulated at the BES II detector. The branching fractions $\mathcal{B}({\chi }_{cJ}\to K^{\ast }(892{)}^0{\bar{K}}^{\ast }(892{)}^0)$ $(J=0,1,2)$ are determined to be $(1.55\pm 0.35\pm 0.30)\times 10^{-3}$, $(1.58\pm 0.32\pm 0.29)\times 10^{-3}$, and $(4.67\pm 0.55\pm 0.85)\times 10^{-3}$ for the ${\chi }_{c0}$, ${\chi }_{c1}$ and ${\chi }_{c2}$ decays, respectively, where the first errors are statistical and the second are systematic. The significances of these signals are about 4.2$\sigma$, 4.3$\sigma$, and 7.5$\sigma$, respectively.

arXiv comment8 pages, 6 figures

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Cited by in corpus (9)

• Mechanisms for ${\chi }_{cJ}\to \varphi \varphi$ Decays
• Partial Wave Analysis of ${\chi }_{c0}\to {\pi }^{+}{\pi }^{-}{K}^{+}{K}^{-}$
• A coherent study of ${\chi }_{c0,2}\to VV$, $PP$ and $SS$
• χ_{c0,2} decay into light meson pairs and its implication of the scalar meson structures
• Understanding the branching ratios of χ_{c1}\toϕϕ, ωω, ωϕobserved at BES-III
• Obervation of χ_{cJ}--> omega omega decays
• Measurement of χ_cJ--> K+K-K+K-
• First observations of $\psi (2S)$ and ${\chi }_{cJ}(1P)$ decays to four-body final states $h^{+}{h}^{-}{K}_S^0{K}_S^0$
• Probing scalar meson structures in ${\chi }_{c1}$ decays into pseudoscalar and scalar