TMD PDF's: gauge invariance, RG properties and Wilson lines
classification
✦ hep-ph
keywords
anomalousdimensionsgaugerenormalizationassociatedcalculatedcontour-dependentdependent
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The UV divergences associated with transverse-momentum dependent (TMD) parton distribution functions (PDF) are calculated together with the ensuing one-loop anomalous dimensions in the light-cone gauge. Time-reversal-odd effects in the anomalous dimensions are observed and the role of Glauber gluons is discussed. A generalized renormalization procedure of TMD PDFs is proposed, relying upon the renormalization of contour-dependent operators with obstructions.
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