Analytic approach in QCD and hadronic decays of the tau lepton

Abstract

High precise measurements of vector and axial-vector spectral functions in hadronic decays of the lepton stimulate the further theoretical researches of various forms of perturbative expansions and nonperturbative effects. Advantages and self-consistency of the the Shirkov-Solovtsov analytic approach in describing the hadronic decays the lepton are demonstrated.