An Analysis of Scheme Transformations in the Vicinity of an Infrared Fixed Point

Abstract

We give a detailed analysis of the effects of scheme transformations in the vicinity of an exact or approximate infrared fixed point in an asymptotically free gauge theory with fermions. We list necessary conditions that such transformations must obey and show that, although these can easily be satisfied in the vicinity of an ultraviolet fixed point, they constitute significant restrictions on scheme transformations at an infrared fixed point. We construct acceptable scheme transformations and use these to study the scheme-dependence of an infrared fixed point, making comparison with our previous three-loop and four-loop calculations of the location of this point in the $\overline{MS}$ scheme. We also use an illustrative hypothetical exact $\beta$ function to investigate how accurately analyses of finite-order series expansions probe an infrared fixed point and the effect of a scheme transformation on these. Some implications of our work are discussed.

21 pages, latex

References in corpus (11)

• Minimal Walking Technicolor: Set Up for Collider Physics
• Supersymmetry Inspired QCD Beta Function
• Eliminating the Renormalization Scale Ambiguity for Top-Pair Production Using the Principle of Maximum Conformality
• The physics of eight flavours
• Nearly conformal gauge theories in finite volume
• Higher-Loop Corrections to the Infrared Evolution of a Gauge Theory with Fermions
• Maximum Wavelength of Confined Quarks and Gluons and Properties of Quantum Chromodynamics
• Beta Function and Anomalous Dimensions
• Running coupling constant of ten-flavor QCD with the Schrödinger functional method
• Study of the Change from Walking to Non-Walking Behavior in a Vectorial Gauge Theory as a Function of Nf
• Comparison of Some Exact and Perturbative Results for a Supersymmetric SU($N_c$) Gauge Theory

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