Speaker
Prof.
simonetta liuti
(university of virginia)
Description
Electromagnetic interactions probe the Fourier transform of the quark-quark correlation function measuring the light cone distance traveled by the struck quark during the interaction, also known as Ioffe time. The small distance behavior of the correlation function can be determined by the first few moments calculated on the lattice while its large distance behavior, exceeding the proton size, is regulated by Regge type terms. I will show how this characteristic dependence of the correlation function can be used to extract the Bjorken x dependence of the u and d quark generalized parton distributions in the proton. I will also present a study of QCD evolution in the transverse space coordinate for the recently introduced pseudo-pdfs using a phenomenological model.
