Mass Corrections to the Tau Decay Rate
Abstract
In this note radiative corrections to the total hadronic decay rate of the -lepton are studied employing perturbative QCD and the operator product expansion. We calculate quadratic quark mass corrections to the decay rate ration to the order and find that they contribute appreciably to the Cabbibo supressed decay modes of the -lepton. We also discuss corrections of mass dimension D=4, where we emphasize the need of a suitable choice of the renormalization scale of the quark and gluon condensates.
Cite
@article{arxiv.hep-ph/9805232,
title = {Mass Corrections to the Tau Decay Rate},
author = {K. G. Chetyrkin and A. Kwiatkowski},
journal= {arXiv preprint arXiv:hep-ph/9805232},
year = {2015}
}
Comments
13 pages, LaTeX, no figures. This version fixes a typo in eq. (25) of the original paper (Z. Phys. C59 (1993) 525) and an errror in a numerical integration procedure which has resulted to a significant increase of the O(\alpha_s^2) coefficient in eq. (27). As a consequence also some tables in Section 4 have been modified