Lattice QCD extraction of the ${\eta }_c$-meson $t$-dependent parton distribution function

Abstract

The formalism of short-distance factorization, conveyed through the pseudo-distribution approach, connects space-like and light-cone correlators and thus allows for the extraction in lattice QCD of a number of parton distributions. We compute the $t$-dependent parton distribution function of valence quarks in a ${\eta }_c$-meson. After reviewing the main ideas behind the pseudo-distribution formalism, and relying on the analytic structure of Ioffe-time distributions, we come up with a proposal for a model-independent extraction of $t$-dependent parton distribution functions. We present results for the ${\eta }_c$-meson Ioffe time valence $t$-dependent parton distribution function at a renormalization scale of $3\text{GeV}$.

Comments: 6 pages, 2 figures, contribution to the 31st International Workshop on Deep Inelastic Scattering (DIS2024), 8-12 April 2024, Grenoble, France