Alpha_s from Tau Decays

Abstract

We review the present status in the determination of the $accurate$ value of ${\alpha }_s$ from $\tau$-decays, where we discuss in detail the different sources of theoretical errors.

Comments: Due to some requests, this paper replaces file corrupted by e-mail transfer: Talk given at the third Workshop on Tau Lepton Physics, Montreux, Switzerland, September 1994. published in Nucl.Phys. B, proceedings supplement, 40 (1995) 47-58