Vector meson production in the final stateK ⁺ K ⁻π⁺π⁻ of photon-photon collisions

Abstract

Vector meson production is studied in the reaction γγ→K ⁺ K ⁻π⁺π⁻. A clear Φ(1020) signal is seen in theK ⁺ K ⁻ mass distribution and aK ^*0 (890) signal is visible in theK ^±π^∓ one. Both do not seem to be strongly correlated with quasi two body final states. Cross sections for the processes γγ→K ⁺ K ⁻π⁺π⁻, γγ→Φπ⁺π⁻, γγ→K ⁺⁰ K ^±π^∓ and upper limits for the production of Φp, ΦΦ andK ^*0 $\overline {K^{ * 0} }$ are given as function of the invariant γγ mass.