QCD glueball sum rules and vacuum topology

Abstract

Several key problems of QCD sum rules in the spin-0 glueball channels are resolved by implementing nonperturbative short-distance physics from direct instantons and topological charge screening. A lattice-based instanton size distribution and the IR renormalization of the nonperturbative Wilson coefficients are also introduced. Results of a comprehensive quantitative sum rule analysis are reviewed and their implications discussed.

Comments: Presented at the Seventh Workshop on Continuous Advances in QCD, Minneapolis, May 11-14, 2006, 7 pages