ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2012, vol. 86, p. -
Observation of χ cJ decays to ΛΛ̄π +π -
Decays of the χ cJ states (J=0, 1, 2) to ΛΛ ̄π +π -, including processes with intermediate Σ(1385), are studied through the E1 transition ψ ′→γχ cJ using 106×106 ψ ′ events collected with the BESIII detector at BEPCII. This is the first observation of χ cJ decays to the final state ΛΛ̄π +π -. The branching ratio of the intermediate process χ cJ→Σ(1385) ±Σ̄(1385) is also measured for the first time, and the results agree with the theoretical predictions based on the color-octet effect. © 2012 American Physical Society.