Color Gauge Invariance in Hard Processes |
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Authors: | F Pijlman |
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Institution: | (1) Department of Physics and Astronomy, Vrije Universiteit, 1081 Amsterdam, HV, The Netherlands |
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Abstract: | Within the theoretical framework which we apply, a suggested origin for single-spin asymmetries is the presence of gauge links in transverse momentum-dependent distribution functions. Recently we found new gauge-link structures in a number of hard processes. These structures need to be considered in the evolution of parton distribution functions and for establishing factorization. |
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