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

Abstract

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 prescription in the standard hard-scattering approach. The results show that the contributions from twist-3 parts are actually not power suppressed comparing with the leading-twist contributions and the cross sections agree well with the experimental data in the two-photon center-of-mass energy $W>2.8$ GeV. We also predict the cross section ratio ${\sigma }_0({\pi }^{+}{\pi }^{-})/{\sigma }_0(K^{+}{K}^{-})$, which is compatible with the experimental data from TPC and Belle.

18 pages, 13 figures

References in corpus (8)

• Moments of pseudoscalar meson distribution amplitudes from the lattice
• Lattice Results for Low Moments of Light Meson Distribution Amplitudes
• Meson wave function from holographic models
• Second Moment of the Pion Light-cone Distribution Amplitude from Lattice QCD
• Meson structure in light-front holographic QCD
• A Comprehensive Analysis on the Pion-Photon Transition Form Factor Beyond the Leading Fock State
• NLO perturbative QCD predictions for gamma gamma -> M+ M- (M=pi,K)
• Selected topics in e^+e^- collisions

Cited by in corpus (2)

• Study of $B_{u,d,s}\to K_0^{\ast }(1430)P$ and $K_0^{\ast }(1430)V$ decays within QCD factorization
• Twist-3 contributions to $\gamma \gamma \to {\pi }^{+}{\pi }^{-},K^{+}{K}^{-}$ processes in perturbative QCD approach