Scalar mesons and glueballs in D-p-D-q hard-wall models

Abstract

We investigate the light scalar mesons and glueballs in the D-p-D-q hard-wall models, including D-3-D-q, D-4-D-q, and D-6-D-q systems. It is found that only in the D-4-D-6 and D-4-D-8 hard-wall models are the predicted masses of the (q) over barq scalar meson f(0) scalar glueball consistent with their experimental or lattice results. This indicates that D-4-D-6 and D-4-D-8 hard-wall models are the favorite candidates of the realistic holographic QCD model.