Supergravity Models for 3+1 Dimensional QCD

Details Supergravity Models for 3+1 Dimensional QCD Supergravity Models for 3+1 Dimensional QCD

1999-02-10

arxiv.org/abs/hep-th/9902067v1

Phys.Rev.D60:044001,1999

Physics

High Energy Physics

High Energy Physics - Theory

27 pages, LaTeX, 11 figures included

Scientific paper

10.1103/PhysRevD.60.044001

The most general black M5-brane solution of eleven-dimensional supergravity (with a flat R^4 spacetime in the brane and a regular horizon) is characterized by charge, mass and two angular momenta. We use this metric to construct general dual models of large-N QCD (at strong coupling) that depend on two free parameters. The mass spectrum of scalar particles is determined analytically (in the WKB approximation) and numerically in the whole two-dimensional parameter space. We compare the mass spectrum with analogous results from lattice calculations, and find that the supergravity predictions are close to the lattice results everywhere on the two dimensional parameter space except along a special line. We also examine the mass spectrum of the supergravity Kaluza-Klein (KK) modes and find that the KK modes along the compact D-brane coordinate decouple from the spectrum for large angular momenta. There are however KK modes charged under a U(1)xU(1) global symmetry which do not decouple anywhere on the parameter space. General formulas for the string tension and action are also given.

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