We present in this talk a recent investigation on $phi$ photoproduction, emphasizing the rescattering effects of the $KLambda^*$ channel near the threshold region. We discuss the results of the differential cross section and the angular distributions.
In this presentation, we briefly review recent investigations on pion and kaon structures from the instanton vacuum. Starting from the low-energy QCD partition function, we have computed the Gasser-Leutwyler low-energy constants, electromagnetic form
factors of the pion and kaon, semileptonic decay form factors of the kaon, and light-cone distribution amplitues of the pion and kaon. The results are in good agreement with the experimental and empirical data.
