Production of meson pairs,involving tensor and pseudotensor mesons,in photon-photon collisions

Starting from a bound-state model of weakly bound quarks for (qq¯) mesons, we derive a formalism for computing the production or decay of such mesons, whatever the value of their internal orbital angular momentum L. That approach appears as a natural generalization of the Brodsky-Lepage formalism (valid only for L = 0) that has been widely used in recent years for the computation of exclusive processes in perturbative QCD. We here apply it to the production, in photon-photon collisions, of: i ) tensormeson pairs; ii ) pseudotensor-meson pairs; iii ) hybrid pairs made of a pion and a pseudotensor meson. The numerical results we obtain allow for some hope of experimentally identifying such pairs, in the charged channels, at high-energy e ⁺ e ^?. colliders of the next generation, provided integrated luminosities as high as ~10⁴⁰ cm^?2 can be reached.