



01342nas a2200169   4500008004100000245007000041210006900111260001400180520083000194100002201024700001301046700002001059700001801079700001701097700002101114856003701135       2020                        eng d00aConfronting lattice parton distributions with global QCD analysis0 aConfronting lattice parton distributions with global QCD analysi  c10/1/20203 a<p>We present the first Monte Carlo based global QCD analysis of spin-averaged and spin-dependent parton distribution functions (PDFs) that includes nucleon isovector matrix elements in coordinate space from lattice QCD. We investigate the degree of universality of the extracted PDFs when the lattice and experimental data are treated under the same conditions within the Bayesian likelihood analysis. For the unpolarized sector, we find rather weak constraints from the current lattice data on the phenomenological PDFs, and difficulties in describing the lattice matrix elements at large spatial distances. In contrast, for the polarized PDFs we find good agreement between experiment and lattice data, with the latter providing significant constraints on the spin-dependent isovector quark and antiquark distributions</p>1 aBringewatt, Jacob1 aSato, N.1 aMelnitchouk, W.1 aQiu, Jian-Wei1 aSteffens, F.1 aConstantinou, M.  uhttps://arxiv.org/abs/2010.00548