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Towards a Direct Measurement of the Quark Orbital Angular Momentum Distribution
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Towards a Direct Measurement of the Quark Orbital Angular Momentum Distribution
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We discuss two different definitions of partonic orbital angular momentum given in the literature in terms of the Fourier transform of a Wigner distribution, $F_{14}$, and a twist three generalized parton distribution, $\tilde{E}_{2T}$, respectively. We derive a relation between the two definitions which reflects their specific spin and intrinsic transverse momentum/transverse space correlations as well as their gauge link structure.
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