Speaker
Description
Generalized parton distributions (GPDs) are important quantities that characterize the structure of hadrons. They provide information about the partons’ momentum distribution and also on their distribution in position space. Most of the information from lattice QCD is on the Mellin moments of GPDs, namely form factors and their generalizations. Recent developments in calculations of matrix elements of boosted hadrons coupled with non-local operators opened a new direction of extracting the x dependence of GPDs. In this talk, we will discuss selected results on the two approaches to get information on GPDs and highlight their advantages and disadvantages. I also discuss novel calculations to extract the x-dependence on twist-3 GPDs using the quasi-distribution functions approach and LaMET. Information on twist-3 GPDs is basically non-existing, but they are essential for several reasons.