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Title
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Renormalization-group anatomy of transverse-momentum dependent parton distribution functions in qcd
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Author
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Abstract
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| The ultraviolet and rapidity divergences of transverse-momentum dependent parton distribution functions with lightlike and transverse gauge links is studied, also incorporating a soft eikonal factor. We find that in the light-cone gauge with q(-)-independent pole prescriptions extra divergences appear which amount, at one-loop, to a cusp-like anomalous dimension. We show that such contributions are absent when the Mandelstam-Leibbrandt prescription is used. In the first case, the soft factor cancels the anomalous-dimension defect, while in the second case its ultraviolet-divergent part reduces to unity. |
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Language
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English
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Source (journal)
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Modern physics letters A. - Singapore
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Publication
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Singapore
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2009
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ISSN
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0217-7323
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DOI
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10.1142/S0217732309001121
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Volume/pages
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24
:35-37
(2009)
, p. 2913-2923
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ISI
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000272695600012
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Full text (Publisher's DOI)
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