Abstract
The two-photon partial widths of several light-quark resonances formed in γγ collisions have been measured by the L3 detector at LEP. The η′(958) is measured in the decay channel η′→π+π−γ. The π+π−π0 final state is dominated by the a2(1320) meson; there is evidence for a radially excited state, a2′(1750) of JP=2+, produced predominantly in the helicity λ=2 state. The f2(1270) is observed in the exclusive γγ→π+π− process. The Ks0Ks0 final state is analyzed for the f2′(1525); an enhancement at 1750 MeV is observed. The charmonium states are reported for the ηc in several decay channels and the χc2 in its decay to γJ/ψ, J/ψ→e+e− or μ+μ−.
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