Observation of χ<i><sub>cJ</sub></i> decays to Λ(Λ)over-barπ<SUP>+</SUP>π<SUP>-</SUP>


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Ablikim M., Achasov M. N., Ambrose D. J., An F. F., An Q., An Z. H., ...More

PHYSICAL REVIEW D, vol.86, no.5, 2012 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 86 Issue: 5
  • Publication Date: 2012
  • Doi Number: 10.1103/physrevd.86.052004
  • Journal Name: PHYSICAL REVIEW D
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Bursa Uludag University Affiliated: No

Abstract

Decays of the chi(cJ) states (J = 0, 1, 2) to Lambda(Lambda) over bar pi(+)pi(-), including processes with intermediate Sigma(1385), are studied through the E1 transition psi(1) -> gamma chi(cJ) using 106 x 10(6) psi(1) events collected with the BESIII detector at BEPCII. This is the first observation of chi(cJ) decays to the final state Lambda(Lambda) over bar pi(+)pi(-). The branching ratio of the intermediate process chi(cJ) -> (Sigma) over bar (1385)(+/-) (Sigma) over bar (1385)(-/+) is also measured for the first time, and the results agree with the theoretical predictions based on the color-octet effect.