BES Results on Charmonium Decays and Transitions
Abstract
Results are reported based on samples of 58 million
J/ψ
and 14 million
ψ(2S)
decays obtained by the BESII experiment. Improved branching fraction measurements are determined, including branching fractions for
J/ψ→
π
+
π
−
π
0
,
ψ(2S)→
π
0
J/ψ
,
ηJ/ψ
,
π
0
π
0
J/ψ
, anything
J/ψ
, and $\psi(2S)\to\gamma\chi_{c1},\gamma\chi_{c2}\to\gamma\gamma\jpsi$. Using 14 million
ψ(2S)
events,
f
0
(980)
f
0
(980)
production in
χ
c0
decays and
K
∗
(892
)
0
K
¯
∗
(892
)
0
production in
χ
cJ
(J=0,1,2)
decays are observed for the first time, and branching ratios are determined.