Top Quark Contribution to Hadronic Decays of theZBoson atO(αs2)in QCD

1994/06/28 by Davison E. Soper, Levan R. Surguladze · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevlett.73.2958

published as Phys.Rev.Lett. 73 (1994) 2958-2961 · 10 pages, REVTeX 3.0 with 4 postscript figures compressed with uufiles, University of Oregon preprint OITS 545

arxiv created 1994/06/28 · openalex publication_date 1994/11/28 · arxiv updated 2009/11/30 · openalex created_date 2020/05/13 · openalex updated_date 2026/07/28

Abstract

We evaluate the effect of a virtual top quark on the coefficient of \ensuremathα_s² in the decay rates \ensuremathΓ(Z\ensuremath→hadrons) and \ensuremathΓ(Z\ensuremath→bb). We treat the dependence on the top quark mass exactly instead of using a large mass expansion. The present work completes the evaluation of the \ensuremathα_s² contributions to these quantities. The calculation uses both the modified minimal subtraction and Collins-Wilczek-Zee renormalization prescriptions. The results can be applied to the hadronic decays of the \ensuremathτ lepton.

Citations

• EUCLIDEAN ASYMPTOTIC EXPANSIONS OF GREEN FUNCTIONS OF QUANTUM FIELDS (I) EXPANSIONS OF PRODUCT OF SINGULAR FUNCTIONS
• Infrared singularities and massive fields

Cited by

• Quadratic mass corrections of order to the decay rate of Z- and W-bosons