Speaker
Dr
Joe Karpie
(Columbia U)
Description
In recent years, parton distributions have been calculated from ab initio QCD using non-perturbative lattice field theory. In this presentation, I focus on a Lorentz invariant generalization of the Ioffe time distribution which can be calculated directly on the Lattice. Just like experimental cross sections, these matrix elements can be factorized into the PDF. I present our latest results for the nucleon and pion unpolarized iso-vector PDF which are testing the systematic errors of these calculations, including an extrapolation to physical pion mass, discretization errors, and finite volume errors.
Authors
Alexander Rothkopf
(Institute for Theoretical Physics, Heidelberg University)
Anatoly Radyushkin
(ODU/JLab)
Dr
Balint Joo
(Jefferson Lab)
David Richards
(Jefferson Laboratory)
Dr
Joe Karpie
(Columbia U)
Kostas Orginos
(College of William and Mary / JLab)
Robert Edwards
(Jefferson Lab)
Savvas Zafeiropoulos
(LPC Universite Blaise Pascal CNRS)
