Holographic Heavy Quark Symmetry

Abstract

We investigate the heavy quark spin symmetry, i.e. the mass degeneracy of pseudo-scalar and vector quarkonia at heavy quark limit, by using the gauge/gravity correspondence. We allow generic D3-like geometry with a flavor D7-brane, to avoid supersymmetric mass degeneracy. For geometries admitting physical QCD-like properties, we find that the mass degeneracy is generically achieved in a good accuracy, up to a few percent mass splitting. We also compute spectra of excited quarkonia states, and discuss comparisons with experiments and quark-model calculations.

Comments: PDFLaTeX, 1+35 pages, 7 figures; v2: minor corrections; v3: curvature constraints (Sec.3.3.2/App.A.4) added, minor comments and references added, accepted in JHEP