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تسجيل مستخدم جديدOrbital Angular Momentum Distribution of Gluons at Small-$x$ : Analytic interpolation between Ji and Jaffe-Manohar
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We introduced a generalized Wilson line gauge link that reproduces both staple and near straight links in different limits. We then studied the gauge-invariant bi-local orbital angular momentum operator with such a general gauge link, in the framework of Chen et. al. decomposition of gauge fields. At the appropriate combination of limits, the operator reproduces both Jaffe-Manohar and Jis operator structure and offers a continuous analytical interpolation between the two in the small-$x$ limit. We also studied the potential OAM which is defined as the difference between the two, and how it depends on the geometry or orientation of the gauge links.
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A Lattice QCD approach to quark orbital angular momentum in the proton based on generalized transverse momentum-dependent parton distributions (GTMDs) is enhanced methodologically by incorporating a direct derivative technique. This improvement remov
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