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Impact-parameter dependence of the generalized parton distribution of the pion in chiral quark models

We compute the off-forward diagonal non-singlet generalized parton distribution of the pion in two distinct chiral quark models: the Nambu-Jona-Lasinio model with the Pauli-Villars regulator and the Spectral Quark Model. The analysis is carried out in the impact-parameter space. Leading-order perturbative QCD evolution is carried out via the inverse Mellin transform in the index space. The model predictions agree very reasonably with the recent results from transverse-lattice calculations, reproducing qualitatively both the Bjorken-x and the impact-parameter dependence of the data.

preprint2003arXivOpen access
Wojciech BroniowskiEnrique Ruiz Arriola
hep-phhep-lat
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Wojciech BroniowskiEnrique Ruiz Arriola

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