Speaker
Description
We present a lattice QCD study of the moments of the pion generalized parton distributions (GPDs) at both zero and nonzero skewness. The calculations are performed at a lattice spacing of 0.04 fm with a pion mass of 300 MeV, using boosted states up to Pz = 2.43 GeV and momentum transfers reaching 2.75 GeV^2. We extract the generalized form factors (GFFs) associated with the first few moments from nonlocal correlation functions using non-singlet operators. Nonperturbative renormalization and matching are carried out in the ratio scheme, and the data are analyzed through combined fits over multiple kinematics. The zero-skewness results agree with earlier studies, while the nonzero-skewness data are crucial for verifying polynomiality and extracting higher-order GFFs. Finally, the extracted moments are evolved with next-to-next-to-leading order renormalization group resummation, improving the control of perturbative uncertainties.
