Volume 396 - The 38th International Symposium on Lattice Field Theory (LATTICE2021) - Oral presentation
Relating Euclidean correlators and light-cone correlators beyond leading twist
S. Bhattacharya, K. Cichy, M. Constantinou, A. Metz*, A. Scapellato and F. Steffens
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Pre-published on: May 16, 2022
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Abstract
A perturbative matching procedure is needed in order to relate the parton quasi-distributions, that are calculable in lattice-QCD, to the corresponding light-cone distributions which enter physical processes. In the past, this type of matching has been studied extensively for twist-2 distributions. Here, we report on our recent calculation of matching coefficients for the twist-3 parton distributions $g_T(x)$, $e(x)$ and $h_L(x)$. A focus of the presentation are zero-mode contributions which pose a challenge for the matching procedure. We also briefly address the latest twist-3 matching results by other authors which include, in particular, quark-gluon-quark correlations.
DOI: https://doi.org/10.22323/1.396.0105
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