1994/09/26 by S. Peris, Santiago Peris
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1016/0370-2693(94)01400-7
published as Phys.Lett. B343 (1995) 339-345 · 13 pages and one figure available by fax from [email protected] TeX file. Uses phyzzx. CERN-TH-7446/94. Section on $Z\to b \bar b$ is removed
arxiv created 1994/09/26 · openalex publication_date 1995/01/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
By using effective field theory techniques for the standard model, we discuss the issue of what μ scale is the appropriate one in the QCD corrections to the large-\mt electroweak contributions to Δr. This needs the construction of an effective field theory below the top quark. We argue that, while matching corrections do verify the simple prescription of taking μ≃ \mt in \a(\m), logarithmic (i.e. ∼ log \mt) corrections do not, and require the use of the running \a(μ) in the corresponding renormalization group equation.