1988 CELLO, JADE, and PLUTO contributions to ‘‘exotic’’ meson spectroscopy Available to Purchase

This article reviews selected recent results on resonance formation in γγ reactions obtained with the CELLO, JADE, and PLUTO spectrometers at the e⁺e⁻ storage ring PETRA. New stringent limits on the γγ coupling of glueball candidates as well as new results on tensor and scalar mesons are presented. The recent observation of π₂(1680) formation is confirmed by the CELLO group. Finally the two spin 1 states observed in γγ^* interactions, in particular the parity of the X₁(1420) and the model dependence of present analyses are discussed.