Aspects of QCD Dynamics from String Theory

Abstract

We study dynamical aspects of large N QCD_4 via supergravity on Anti de Sitter black hole geometry. We compute the mass spectrum, the topological susceptibility and the gluon condensate and make a comparison to lattice simulations. We present analogous results for QCD_3.

Comments: LaTeX. 13 pages; v2. Minor changes; v3. changes in the detailed form of the parameterization of fluctuating degrees of freedom in eqs (2.8) and (2.9) and the numerical coefficient of the string tension reported in eqs (6.1). Conclusions are unchanged