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Partial wave analysis ofχc0→π+π−K+K−

Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology2005Vol. 72(9)

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Abstract

A partial wave analysis of ${\ensuremath{\chi}}_{c0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{K}^{+}{K}^{\ensuremath{-}}$ in $\ensuremath{\psi}(2S)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\chi}}_{c0}$ decay is presented using a sample of $14\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\ensuremath{\psi}(2S)$ events accumulated by the BES II detector. The data are fitted to the sum of relativistic covariant tensor amplitudes for intermediate resonant decay modes. From the fit, significant contributions to ${\ensuremath{\chi}}_{c0}$ decays from the channels ${f}_{0}(980){f}_{0}(980)$, ${f}_{0}(980){f}_{0}(2200)$, ${f}_{0}(1370){f}_{0}(1710)$, ${K}^{*}(892{)}^{0}{\overline{K}}^{*}(892{)}^{0}$, ${K}_{0}^{*}(1430){\overline{K}}_{0}^{*}(1430)$, ${K}_{0}^{*}(1430){\overline{K}}_{2}^{*}(1430)+\mathrm{c}.\mathrm{c}.$, and ${K}_{1}(1270)K$ are found. Flavor-SU(3)-violating ${K}_{1}(1270)\ensuremath{-}{K}_{1}(1400)$ asymmetry is observed. Values obtained for the masses and widths of the resonances ${f}_{0}(1710)$, ${f}_{0}(2200)$, ${f}_{0}(1370)$, and ${K}_{0}^{*}(1430)$ are presented.

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Abstract

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