Constraining quark angular momentum through semi-inclusive measurements

Details Constraining quark angular momentum through semi-inclusive measurements Constraining quark angular momentum through semi-inclusive measurements

2011-07-28

arxiv.org/abs/1107.5755v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 figure. Version 2 is similar to publised version, has minor changes in text and bibliography, and the final values

Scientific paper

The determination of quark angular momentum requires the knowledge of the generalized parton distribution E in the forward limit. We assume a connection between this function and the Sivers transverse-momentum distribution, based on model calculations and theoretical considerations. Using this assumption, we show that it is possible to fit at the same time nucleon magnetic moments and semi-inclusive single-spin asymmetries. This imposes additional constraints on the Sivers function and opens a plausible way to quantifying quark angular momentum.

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