QCD Factorization, Wilson Loop Space and Unintegrated Gluon Distributions

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作者：
Igor O. Cherednikov
机构：
[1] SCK-CEN,
[2] Universiteit Antwerpen,undefined
来源：
Few-Body Systems | 2017年 / 58卷
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摘要：
Currently available operator definitions of gauge-invariant unintegrated (transverse momentum dependent) gluon density function available are briefly overviewed, with emphasis on the structure of the associated Wilson lines. A gauge-invariant generating function with maximal path-dependence is proposed, which, as distinct from the common methodology, is based on arbitrary Wilson loops with no reference to any factorization scheme. After the local area differentiation defined in the Wilson loop space, this object can be used to define fully unintegrated gluon distribution functions in a way potentially suitable for the lattice simulations.
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