Successes and Failures of a More Comprehensive Hard Wall AdS/QCD

Abstract

We explore corrections to the "hard wall" gravity dual of QCD with two-form tensor fields. These fields correspond to a dimension three quark bilinear in QCD, which generates states with 1(--) and 1(+-) quantum numbers, or omega/rho-like and h1/b1-like mesons, respectively. We include new interaction terms, which render the model complete up to dimension six. We find that breaking chiral symmetry induces modifications to the spectrum, by mixing the vector current and the new two-tensor operator. This breaks the degeneracy of the 1(--) and 1(+-) spectra. We also compute the (b1->omega + pi) decay rate and D/S ratio, and the couplings of excited rho states to two pions. We then perform a comprehensive new fit to QCD data. We obtain a value for the magnetic susceptibility of the QCD quark condensate which is consistent with phenomenological estimates. These results allow us to evaluate the success of dimension counting and UV matching in this model.

51 pages, 1 figure

References in corpus (3)

• Determination of the magnetic susceptibility of the quark condensate using radiative heavy meson decays
• Mesons as Open Strings in a Holographic Dual of QCD
• Probing the nucleon's transversity and the photon's distribution amplitude in lepton pair photoproduction

Cited by in corpus (10)

• Vortical susceptibility of finite-density QCD matter
• Scalar resonances in the hadronic light-by-light contribution to the muon $(g-2)$
• Central Production of $\eta$ via Double Pomeron Exchange and Double Reggeon Exchange in the Sakai-Sugimoto Model
• A Holographic Model of Heavy-light Mesons
• A Second Look at String-Inspired Models for Proton-Proton Scattering via Pomeron Exchange
• Lurking pseudovectors below the TeV scale
• Baryon as dyonic instanton-II. Baryon mass versus chiral condensate
• Phases of a 10-D Holographic hard wall model
• Tensor supercurrent in QCD
• On the evaluation of vortical susceptibility of chiral condensate in QCD