Partial-wave analysis of J/ψ→K+K−π0

M. Ablikim, M. N. Achasov, P. Adlarson, S. Ahmed, M. Albrecht, M. Alekseev, A. Amoroso, F. F. An, Q. An, Y. Bai, O. Bakina, R. Baldini Ferroli (+474 others)
2019 Physical Review D  
A partial-wave analysis of the decay J=ψ → K þ K − π 0 has been made using ð223.7 AE 1.4Þ × 10 6 J=ψ events collected with the BESIII detector in 2009. The analysis, which is performed within the isobar-model approach, reveals contributions from K Ã 2 ð1430Þ AE , K Ã 2 ð1980Þ AE and K Ã 4 ð2045Þ AE decaying to K AE π 0 . The two latter states are observed in J=ψ decays for the first time. Two resonance signals decaying to K þ K − are also observed. These contributions cannot be reliably
more » ... be reliably identified and their possible interpretations are discussed. The measured branching fraction BðJ=ψ → K þ K − π 0 Þ of ð2.88 AE 0.01 AE 0.12Þ × 10 −3 is more precise than previous results. Branching fractions for the reported contributions are presented as well. The results of the partial-wave analysis differ significantly from those previously obtained by BESII and BABAR.
doi:10.1103/physrevd.100.032004 fatcat:lh5gl4oegjbrnizkpqgcg2gwoy