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Double parton distributions in the pion in the Nambu and Jona-Lasinio model

Two-parton correlations in the pion, a non perturbative information encoded in double parton distribution functions, are investigated in the Nambu and Jona-Lasinio model. It is found that double parton distribution functions expose novel dynamical information on the structure of the pion, not accessible through one-body parton distributions, as it happens in several estimates for the proton target and in a previous evaluation for the pion, in a light-cone framework. Expressions and predictions are given for double parton distributions corresponding to leading-twist Dirac operators in the quark vertices, and to different regularization methods for the Nambu and Jona-Lasinio model. These results are particularly relevant in view of forthcoming lattice data.

preprint2019arXivOpen access
Aurore CourtoySantiago NogueraSergio Scopetta
hep-ph
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Open access3 authors1 topic
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Aurore CourtoySantiago NogueraSergio Scopetta

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