Journal
MODERN PHYSICS LETTERS A
Volume 24, Issue 35-37, Pages 2913-2923Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217732309001121
Keywords
Transverse-momentum dependence; Wilson lines; renormalization group
Categories
Funding
- Heisenberg-Landau Program
- Russian Federation Scientific Schools [195.2008.9]
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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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