Observation of chi_{cJ} Decays to \Lambda \Lambda bar\pi^{+}\pi^{-}
  Decays of the chi_{cJ} states (J=0,\ 1,\ 2) to \Lambda \Lambda bar\ pi^{+} \pi^{-}, including processes with intermediate \Sigma(1385), are studied through the E1 transition psi'-->\gamma chi_{cJ} using 106 million psi' events collected with the BESIII detector at BEPCII. This is the first observation of chi_{cJ} decays to the final state \Lambda\Lambda bar \pi^{+}\pi^{-}. The branching ratio of the intermediate process chi_{cJ}-->\Sigma(1385)^{+/-} \bar{\Sigma}(1385)^{-/+} is also measured for the first time, and the results agree with the theoretical predictions based on the color-octet effect. 
BESIII Collaboration: M. Ablikim, M. N. Achasov, D. J. Ambrose, F. F.   An, Q. An, Z. H. An, J. Z. Bai, Y. Ban, J. Becker, J...
hep-ex