2012/07/31 by BESIII Collaboration, M. Ablikim, M. N. Achasov +405 · 2 citations
Physics and Astronomy · #Bar (unit) #Branching fraction #Detector #Geometry #Intermediate state #Lambda #Nuclear physics #Nuclear physics research studies #Particle physics #Particle physics theoretical and experimental studies #Physics #Pi #Process (computing) #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Sigma #State (computer science) #hep-ex
paper · pdf · doi:10.1103/physrevd.86.052004
published as Physical Review D 86, 052004 (2012)
openalex publication_date 2012/09/13 · arxiv created 2012/09/18 · arxiv updated 2012/09/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
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.