Title: Pseudo Parton Distributions from Lattice QCD
Speaker: Joseph Karpie, College of William and Mary
Abstract: Parton Distribution Functions (PDFs) are important objects
for interpreting the hadronic scattering experiments in terms of the
Standard Model particles. PDFs are used to relate hadron degrees of
freedom and parton degrees of freedom and by definition cannot be
calculated in perturbation theory. In recent years, there have been
many proposals of how to extract PDFs from lattice calculable matrix
elements. Pseudo-PDFs and Good Lattice Cross Sections are two such
methods involving matrix elements of space-like separated fields.
Analogous to phenomenological PDF extraction from experimental cross
sections, these matrix elements can be factorized into hard partonic
parts and PDFs. I will show a lattice calculation of these matrix
elements and the methods being developed to extract the PDF from these
calculations.