A Guide to Light-Cone PDFs from Lattice QCD: An Overview of Approaches, Techniques, and Results

Figure 39

The vector-vector () current-current matrix element in a boosted pion state vs. the Ioffe time ( is pion momentum and is separation of currents). Colors correspond to different separations in lattice units. These matrix elements can be factorized into the pion PDF. Source: [231], reprinted with permission by the Authors.