$\gamma \gamma \to M^{+}{M}^{-}(M=\pi ,K)$ processes with twist-3 corrections in QCD

Cong Wang, Ming-Zhen Zhou, Hong Chen

We study the $\gamma \gamma \to M^{+}{M}^{-}(M=\pi ,K)$ processes with the contributions from the two-particle twist-2 and twist-3 distribution amplitudes of pion and kaon mesons on BHL pr…