Supergravity models for (3+1)-dimensional QCD
- Department of Physics, University of California, Berkeley, California 94720 (United States)
- Theoretical Physics Group, Ernest Orlando Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States)
- Departamento de Fisica, Universidad de Buenos Aires, Ciudad Universitaria, Pabellon I, 1428 (Buenos Aires)
- Theory Division, CERN, CH-1211 Geneva 23 (Switzerland)
The most general black M5-brane solution of eleven-dimensional supergravity (with a flat {bold R}{sup {bold 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){times}U(1) global symmetry which do not decouple anywhere on the parameter space. General formulas for the string tension and action are also given. {copyright} {ital 1999} {ital The American Physical Society}
- OSTI ID:
- 365899
- Journal Information:
- Physical Review, D, Vol. 60, Issue 4; Other Information: PBD: Aug 1999
- Country of Publication:
- United States
- Language:
- English
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