@Article{Courtoy_etal2020,
author="Courtoy, A.
and Noguera, S.
and Scopetta, S.",
title="Two-current correlations in the pion in the Nambu and Jona-Lasinio model",
journal="European Physical Journal C",
year="2020",
publisher="Springer",
volume="80",
number="10",
pages="909 - 11pp",
abstract="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.",
optnote="WOS:000576966100003",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4564), last updated on Mon, 26 Oct 2020 08:54:29 +0000",
issn="1434-6044",
doi="10.1140/epjc/s10052-020-08470-1",
opturl="https://arxiv.org/abs/2006.05300",
opturl="https://doi.org/10.1140/epjc/s10052-020-08470-1",
language="English"
}