QCD GLUEBALL SUM RULES AND VACUUM TOPOLOGY

摘要

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.