[Jlab-seminars] Theory Seminar

[Mary Fox]

Theory Seminar
Monday, May 11, 2015
1:00 p.m. (coffee at 12:45 p.m.)
CEBAF Center, Auditorium

Fernanda Steffens
DESY (Zeuthen)

A Lattice Calculation of Parton Distributions

We report on our exploratory study for the direct evaluation of the Parton
distribution functions from lattice QCD, based on a recently proposed 
new approach.
We present encouraging results using Nf = 2 + 1 + 1 twisted mass 
fermions with
a pion mass of about 370MeV. The focus of this work is a detailed 
description
of the computation, including the lattice calculation, the matching to 
an infinite
momentum and the nucleon mass correction. In addition, we test the 
effect of
gauge link smearing in the operator to estimate the influence of the 
Wilson line
renormalization, which is yet to be done.