Glueball searches in $\gamma\gamma$ collisions at LEP

We report about the work, still preliminary, done by the LEP experiments on glueball searches in Ir collisions. The ALEPH experiment has studied the production of the glue ball candidate f0f0(1500) via its decay to π+π−π+π−. No signal is observed and an upper limit to the γγγγ width of the f0f0(1500) has been calculated. The process γγ→K0sK0sγγ→Ks0Ks0 has been studied with the L3 detector. In the spectrum a clear enhancement is observed around 1750 GeV; it can be due to the formation of a radial recurrence of the f′2f2′ (1525) or to the ss¯ss¯ member of the 0++0++ meson nonet. An upper limits for the two-photon width of the glueball candidate ξξ(2230) has been calculated