Speaker
Dr
Yong Zhao
(Massachusetts Institute of Technology)
Description
In high-energy scattering, the physics of hadrons can be described by various light-cone correlation functions, which include parton distributions, generalized parton distributions, distribution amplitudes, as well as the so-called light-cone wave functions. Because of their explicit time-dependence, these quantities cannot be calculated directly from QCD using Monte Carlo simulations. For years, theorists have resorted to analytical approaches such as light-cone quantization, with little success. In this talk, I will introduce large-momentum effective field theory as a novel approach to extract light-cone correlation functions from Euclidean observables calculable in lattice QCD. Some of recent successful examples are discussed, including the gluon helicity contribution to the proton spin and isovector parton densities.
xji@umd.edu |
Primary authors
Prof.
Xiangdong Ji
(U. Maryland)
Dr
Yong Zhao
(Massachusetts Institute of Technology)