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.