Asymptotic structure of perturbative series for tau lepton observables
High Energy Physics - Phenomenology
2011-09-13 v1
Abstract
We analyze tau lepton decay observables, namely moments of the hadronic spectral density in the finite energy interval (0,M_\tau), within finite order perturbation theory including \alpha_s^4 corrections. The start of asymptotic growth of perturbation theory series is found at this order in a scheme invariant manner. We establish the ultimate accuracy of finite order perturbation theory predictions and discuss the construction of optimal observables.
Keywords
Cite
@article{arxiv.hep-ph/9909225,
title = {Asymptotic structure of perturbative series for tau lepton observables},
author = {J. G. Koerner and F. Krajewski and A. A. Pivovarov},
journal= {arXiv preprint arXiv:hep-ph/9909225},
year = {2011}
}
Comments
21 pages