Study of KK¯ resonances in p¯p→KKπ at 900 and 1640 MeV/c

Prominent KK¯ resonances observed in the in-flight annihilation of p¯p into KKπ include f(1270), f(1500), f2‧(1525), ϕ(1680)/ρ(1700) and a state at 1750 MeV/c consistent with f(1710). The reaction cross sections σ(p¯p→X(KK)π) are obtained by means of a partial wave analysis. When these are combined with known KK¯ partial widths, the resulting production rates of presumably non-nn¯ states, X=f(1710) and f2‧(1525), are found to be suppressed by an order of magnitude compared to f(1500) and f(1270), respectively.