"Implications of Holographic QCD in ChPT with HLS"

Based on the chiral perturbation theory (ChPT) with hidden local symmetry (HLS), we propose a way to calculate 1/Nc corrections to the holographic QCD which is expected to yield the 1/Nc-leading results of the QCD. By integrating out the higher resonances of the infinite tower of the vector mesons in the holographic QCD, we first calculate the O(p^4) terms as well as the O(p^2) terms in the ChPT with HLS (just including the pi and rho mesons without higher resoncances) for the model of Sakai and Sugimoto. Identifying the results for these terms with those of the tree-level of the ChPT with HLS, we find these tree-level values already agree fairly well with the experiments. We then incorporate the 1/Nc-subleading corrections in terms of the meson loop effects in a systematic expansion in the ChPT with HLS. We discuss the loop/(1/Nc) corrections for the quantities like rho-gamma mixing strength, rho-pi-pi coupling and the pion form factor, etc..