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A soft-wall anti-de Sitter/QCD model with a modified five-dimensional metricat the infrared region is constructed to obtain a nontrivial dilaton solution,which incorporates the chiral symmetry breaking and linear confinement. Bytaking the pion mass and decay constant as two input mass scales, the resultingpredictions for the resonance states of pseudoscalar, scalar, vector andaxial-vector mesons agree remarkably with the experimentally confirmedresonance states. The effects of the quartic interaction term are investigatedby taking an appropriate sign and magnitude for maintaining the stability ofthe bulk scalar potential. It is shown that such a simply modified soft-wallanti-de Sitter/QCD model can lead to a consistent prediction for the massspectra of resonance states in the pseudoscalar, scalar, vector andaxial-vector mesons; the agreement with the experimental data is found to bebetter than 10% for the excited meson states. The resulting pion form factoralso agrees well with the experimental data.

Prediction for the Mass Spectra of Resonance Mesons in the Soft-Wall AdS/QCD with a Modified 5D Metric