Abstract
The reaction γγ→K +K −π +π −π 0 has been observed for the first time, using the ARGUS detector at the e +e − storage ring DORIS II at DESY. The cross section shows an enhancement for Wγγ close to 3 GeV/ c 2. Searches for γγ→ωφ and for γγ→φφ leading to this final state, as well as for γγ→φφ→2K +2K −, have been performed. The derived upper limits for ωφ and φφ production are compatible with q q q q model predictions.
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