2023/12/27 by BESIII Collaboration, Ablikim, M., М. Н. Ачасов +735
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2312.16405
openalex publication_date 2023/12/27 · openalex created_date 2023/12/30 · openalex updated_date 2026/08/03
By analyzing (27.12±0.14)×108 ψ(3686) events collected with the BESIII detector operating at the BEPCII collider, the decay processes χcJ → 3(K+K-) (J=0,1,2) are observed for the first time with statistical significances of 8.2σ, 8.1σ, and 12.4σ, respectively. The product branching fractions of ψ(3686)→γχcJ, χcJ→ 3(K+K-) are presented and the branching fractions of χcJ→ 3(K+K-) decays are determined to be B_χc0→ 3(K+K-)=(10.7±1.8±1.1)×10-6, B_χc1→ 3(K+K-)=(4.2±0.9±0.5)×10-6, and B_χc2→ 3(K+K-)=(7.2±1.1±0.8)×10-6, where the first uncertainties are statistical and the second are systematic.