Observation of pseudoscalar and tensor resonances in J/?›???
CitationKolcu, O. B., ... (2016). Observation of pseudoscalar and tensor resonances in J/?›???. Physical Review D. 93.
Based on a sample of (1310.6±10.5)×106 J/? events collected with the BESIII detector operating at the BEPCII storage ring, a partial wave analysis of the decay J/?›??? is performed in order to study the intermediate states. Results of the partial wave analysis show that the structures are predominantly 0-+ states. The existence of the ?(2225) is confirmed, and its resonance parameters are measured. Two additional pseudoscalar states, the ?(2100) with a mass of 2050+30-24+75-26~MeV/c2 and a width of 250+36-30+181-164~MeV/c2 and the X(2500) with a mass of 2470+15-19+101-23~MeV/c2 and a width of 230+64-35+56-33~MeV/c2, are observed. In addition to these three pseudoscalar states, the scalar state f0(2100), and three tensor states, the f2(2010), f2(2300) and f2(2340), are observed in the process J/?›???. The product branching fractions B(J/?›?X)×B(X›??) are reported.