We investigate the light scalar mesons and glueballs in the D p-Dq hard-wall models, including D3-D q, D4-Dq, and D6-Dq systems. It is found that only in the D4-D6 and D 4-D8 hard-wall models are the predicted masses of the q scalar meson f0 scalar glueball consistent with their experimental or lattice results. This indicates that D4-D6 and D 4-D8 hard-wall models are the favorite candidates of the realistic holographic QCD model.
- Scalar glueball
- Scalar meson