Sivers Asymmetry and Generalized Parton Distributions in Impact Parameter Space

Details Sivers Asymmetry and Generalized Parton Distributions in Impact Parameter Space Sivers Asymmetry and Generalized Parton Distributions in Impact Parameter Space

2003-09-08

arxiv.org/abs/hep-ph/0309072v2

Phys.Rev. D69 (2004) 074032

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, typos corrected

Scientific paper

10.1103/PhysRevD.69.074032

Recently, it has been pointed out that there exists a connection between the generalized parton distribution $E(x,0,t)$ and the Sivers asymmetry. For transversely polarized nucleon targets, generalized parton distributions are asymmetric in impact parameter space. This impact parameter space asymmetry, together with the final state interaction of the active quark, gives rise to the Sivers asymmetry in momentum space. We demonstrate this phenomenon explicitly in the scalar diquark model. This result also illustrates the physics that underlies the correlation between the anomalous magnetic moment and the Sivers asymmetry for a given quark flavor.

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