The spin of the $f_{J}(1710)$ and new effects observed in the WA102 experiment

A partial wave analysis of the centrally produced $K\bar{K}$ and $\pi\pi$ systems shows that the fJ(1710) has J = 0. In addition, a study of central meson production as a function of the difference in transverse momentum (dPT) of the exchanged particles shows that undisputed $q\bar{q}$ mesons are suppressed at small dPT whereas the glueball candidates are enhanced and that the production cross section for different resonances depends strongly on the azimuthal angle between the two outgoing protons.