Analytic properties of the QCD running coupling constant and τ decay

• Published in: Physics letters. B Vol. 357; no. 3; pp. 441 - 445
• Main Authors: Jones, H.F, Solovtsov, I.L, Solovtsova, O.P
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 07.09.1995

A non-perturbative expansion method which gives a well-defined analytic continuation of the running coupling constant from the spacelike to the timelike region is applied to the inclusive semileptonic decay of the τ-lepton. The method allows us to evaluate R τ by integration over the non-perturbativ...