Hard two photon processes γγ --> M2 M1 in QCD

Abstract

A short review of leading term QCD predictions vs those of the handbag model for large angle cross sections γγ --> P2 P1 (P is the pseudoscalar meson π,o, K,o, η), and for γγ --> V2 V1 (V is the neutral vector meson o, ω, φ), in comparison with Belle Collaboration measuments

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