Single spin asymmetry parameter from deeply virtual compton scattering of hadrons up to twist - three accuracy. 1. Pion case
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Single spin asymmetry parameter from deeply virtual compton scattering of hadrons up to twist - three accuracy. 1. Pion case

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Single spin asymmetry parameter from deeply virtual compton scattering of hadrons up to twist - three accuracy. 1. Pion case

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Anikin, I. V.; Binosi, Daniele; Medrano, R.; Noguera Puchol, Santiago Perfil; Vento Torres, Vicente
Aquest document és un/a article, creat/da en: 2002

Este documento está disponible también en : http://dx.doi.org/10.1140/epja/iepja1332
The study of deeply virtual Compton scattering (DVCS) has shown that electromagnetic gauge invariance requires, to leading order, not only twist-two but additional twist-three contributions. We apply this analysis and, using the Ellis-Furmanski-Petronzio factorization scheme, compute the single- (electron) spin asymmetry arising in the collision of longitudinally polarized electrons with hadrons up to twist-3 accuracy. In order to simplify the kinematics we restrict the actual calculation to pions in the chiral limit. The process is described in terms of the generalized parton distribution functions which we obtain within a bag model framework.

    Anikin, I.V. Binosi, D. Medrano, R. Noguera Puchol, Santiago Vento Torres, Vicente 2002 Single spin asymmetry parameter from deeply virtual compton scattering of hadrons up to twist - three accuracy. 1. Pion case European Physical Journal A 14 1 95 103
http://dx.doi.org/10.1140/epja/iepja1332
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