Speaker
Christian Zimmermann
Description
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 double parton distributions as well as to parton distribution functions. For this first study, we employ an $N_F = 2 + 1$ CLS ensemble on a $96 \times 32^3$ lattice with lattice spacing $a = 0.0854\ \mathrm{fm}$ and the pseudoscalar masses $m_\pi = 356\ \mathrm{MeV}$ and $m_K = 442\ \mathrm{MeV}$.
Author
Christian Zimmermann