Predictive AdS/QCD Model for Mass Spectra of Mesons with Three Flavors

Understand

The predictive soft-wall AdS/QCD model with a modified 5D metric at the infrared region is constructed to obtain a non-trivial dilaton solution for three flavor quarks $u$, $d$ and $s$.

• Such a model is shown to incorporate both the chiral symmetry breaking and linear confinement.
• After considering some high-order terms including the $U(1)_L\times U(1)_R$ chiral symmetry breaking term, we find that the resulting predictions for the SU(3) octet and singlet resonance states of pseudoscalar, scalar, vector and axial-vector mesons agree well with the experimentally confirmed resonance states.
• Contributions from the instanton effects given by the determinant term are also discussed.