Speaker
Mr
Diogo Boito
(Technische Universität München)
Description
We will discuss recent developments in the QCD description of hadronic
tau decays with emphasis in the perturbative contribution. Various
moments of the hadronic spectral functions have been employed in the
determination of the strong coupling alpha_s from tau decays. We will
analyse the behaviour of their perturbative series under different
assumptions for the large-order corrections and for the
renormalization group improvement of the series. Some moments commonly
employed in alpha_s analyses from tau decays should be avoided because
of their perturbative instability. Finally, we will argue that some
of the recent analyses do not employ an optimal strategy for an
alpha_s determination.
Primary author
Mr
Diogo Boito
(Technische Universität München)
