Evidence for f0(980)f0(980) production in chi_c0 decays

Abstract

Using a sample of 14 million $\psi (2S)$ events accumulated with the BES II detector, evidence for $f_0(980)f_0(980)$ production in ${\chi }_{c0}$ decays is obtained for the first time; the branching ratio is determined to be $\mathcal{B}({\chi }_{c0}\to f_0(980)f_0(980)\to {\pi }^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-})=(7.6\pm 1.9(\mathrm{stat})\pm 1.6(\mathrm{syst}))\times 10^{-4}$. The significance of the $f_0(980)$ signal is about 4.6$\sigma$.

8 pages, 6 figures

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