Speaker
Description
Among other approaches developed in recent years, four-point functions provide access to the $x$ dependence of parton distribution functions (PDFs). One of the corresponding methods is often referred to as the lattice cross section (LCS) approach: in this method, hadronic matrix elements of two local quark-bilinears located at equal time are factorized in terms of a PDF and a perturbative matching kernel by employing the operator product expansion (OPE). The corresponding matrix elements can be obtained by evaluating four-point functions on the lattice. The method has several advantages, for instance the renormalization of the local operators is comparably straightforward. In this talk, I will present some of my recent and ongoing work for nucleon PDFs using the clover fermion ensembles generated by the CLS collaboration.
