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<div class="moz-text-html" lang="x-unicode"> <b>THEORY CENTER
SEMINAR</b><br>
Monday, July 17, 2017<br>
1:00 p.m. (coffee at 12:45 p.m.)<br>
CEBAF Center. Room L113<b><br>
<br>
<br>
Lattice Exploration of Pseudo-PDFs</b> <br>
A. Radyushkin, ODU (in collaboration with K. Orginos, <br>
J. Karpie and S. Zafeiropoulos) <br>
<br>
We demonstrate a new method of extracting parton distributions
from lattice calculations, based on concepts<br>
of pseudo-PDFs and Ioffe-time distributions (ITD). Our lattice
calculation shows a linear component in the<br>
exponential z_3-dependence in the rest-frame ITD expected from the
Z(z_3) factor generated by the gauge link. <br>
We also observe that this factor disappears in the ratio of ITDs
taken at different Ioffe times \nu=Pz_3. When <br>
plotted as a function of the Ioffe time and z_3, the data are very
close to z_3-independent functions which allows <br>
us to extract PDFs. Our curve for u_v(x)-d_v(x) is rather close to
experimental global fits. For small z_3, we observe <br>
perturbative DGLAP evolution of pseudo-PDFs, with \alpha_s/\pi
=0.1. </div>
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