Completing the framework of AdS/QCD: h_1/b_1 mesons and excited   omega/rho's
  We extend the "hard wall" gravity dual of QCD by including tensor fields b_{MN} that correspond to the QCD quark bilinear operators qbar sigma^{mu nu} q. These fields give rise to a spectrum of states which include the h_1 and b_1 mesons, as well as a tower of excited omega/rho meson states. We also identify the lowest-dimension term which leads to mixing between the new rho states and the usual tower of rho mesons when chiral symmetry is broken. 
Sophia K. Domokos, Jeffrey A. Harvey and Andrew B. Royston
hep-th hep-ph