Two-loop renormalization of three-quark operators in QCD

Two-loop renormalization of three-quark operators in QCD

Renormalization of composite three-quark operators in dimensional regularization is complicated by the mixing of physical and unphysical (evanescent) operators. This mixing must be taken into account in a consistent subtraction scheme. In this work we propose a particular scheme that allows one to a...

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Veröffentlicht in:Physics letters. B 2011-09, Vol.703 (4), p.519-523
Hauptverfasser: Kränkl, Susanne, Manashov, Alexander
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Elementary particles
Illustrations
Mathematical analysis
Operators
Regularization
Subtraction
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Manashov, Alexander
description Renormalization of composite three-quark operators in dimensional regularization is complicated by the mixing of physical and unphysical (evanescent) operators. This mixing must be taken into account in a consistent subtraction scheme. In this work we propose a particular scheme that allows one to avoid the necessity of additional finite renormalization and is convenient in QCD applications. As an illustration, we calculate the two-loop anomalous dimensions of local three-quark operators in this scheme.
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subjects Elementary particles
Illustrations
Mathematical analysis
Operators
Regularization
Subtraction
title Two-loop renormalization of three-quark operators in QCD
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