Mass Corrections to the Tau Decay Rate

Details Mass Corrections to the Tau Decay Rate Mass Corrections to the Tau Decay Rate

1998-05-06

arxiv.org/abs/hep-ph/9805232v1

Z.Phys. C59 (1993) 525-532

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, LaTeX, no figures. This version fixes a typo in eq. (25) of the original paper (Z. Phys. C59 (1993) 525) and an errr

Scientific paper

In this note radiative corrections to the total hadronic decay rate of the $\tau$-lepton are studied employing perturbative QCD and the operator product expansion. We calculate quadratic quark mass corrections to the decay rate ration $R_{\tau}$ to the order ${\cal O}(\alpha_s^2 m^2)$ and find that they contribute appreciably to the Cabbibo supressed decay modes of the $\tau$-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.

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