%0 Journal Article
%T Two-current correlations in the pion in the Nambu and Jona-Lasinio model
%A Courtoy, A.
%A Noguera, S.
%A Scopetta, S.
%J European Physical Journal C
%D 2020
%V 80
%N 10
%I Springer
%@ 1434-6044
%G English
%F Courtoy_etal2020
%O WOS:000576966100003
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4564), last updated on Mon, 26 Oct 2020 08:54:29 +0000
%X We present an analysis of two-current correlations for the pion in the Nambu-Jona-Lasinio model, with Pauli-Villars regularization. We provide explicit expressions in momentum space for two-current correlations corresponding to the zeroth component of the vector Dirac bilinear in the quark vertices, which has been evaluated on the lattice, thinking to applications in a high energy framework, as a step towards the calculation of pion double parton distributions. The numerical results show a remarkable qualitative agreement with recent lattice data. The factorization approximation into one-body currents is discussed based on previous evaluation of the relevant low energy matrix elements in the Nambu-Jona-Lasinio model, confirming the lattice result.
%R 10.1140/epjc/s10052-020-08470-1
%U https://arxiv.org/abs/2006.05300
%U https://doi.org/10.1140/epjc/s10052-020-08470-1
%P 909 - 11pp