ABOUT THE LATEST RESULTS ON THE VECTOR MESON PAIR PRODUCTION IN γγ-COLLISIONS

Abstract

The resonance type enhancements discovered recently near the γγ→VV′ reaction thresholds are discussed in detail. It is shown that the signal in the reaction γγ→ρω can be caused by the [Formula: see text] state production. The data on the reaction γγ→K*+K*− are explained by the charged K* Regge exchange. The partial-wave compositions are presented for the OPE and OKE mechanisms in the reactions γγ→ωω and [Formula: see text]. The reaction γγ→φρ is discussed. It is pointed out too that the enhancements in γγ→ρω, [Formula: see text], γγ→ωω in the region 1.8–2 GeV can be caused by the production of the radial excitations of the tensor mesons. The possible further strategy of the search for the [Formula: see text] states in γγ collisions and in the other reactions is discussed.