2019/11/12 by Zimmermann, Christian
#FOS: Physical sciences #High Energy Physics - Lattice (hep-lat)
paper · doi:10.48550/arxiv.1911.05051
We calculate correlation functions of two local operators within the nucleon carrying momentum. We resolve their dependence on the spatial distance of the currents. This is carried out for all Wick contractions, taking into account several operator insertion types. The resulting four-point functions can be related to parton distribution functions as well as to Mellin moments of double parton distributions. For the latter, we analyze their quark spin and flavor dependency. In this first study, we employ an NF = 2 + 1 CLS ensemble on a 96 × 323 lattice with lattice spacing a = 0.0856 fm and the pseudoscalar masses mπ= 355 MeV and mK = 441 MeV.