Speaker
Hsiang-nan Li
(Academia Sinica)
Description
We propose a new analytical nonperturbative formalism, in whcih a
dispersion relation obeyed by a correlation function is treated as an
inverse problem. Given the operator product expansion of the
correlation function in the deep Euclidean region as inputs, we solve
for resonance properties at low energy directly from the dispersion
relation. We demonstrate the power of this approach by presenting the
analysis of nonperturbative QCD observables, including the rho meson
mass, the glueball masses, the topological susceptability, and the
leading-twist pion distribution amplitude.
Primary author
Hsiang-nan Li
(Academia Sinica)
