[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Wednesday, Dec 9, 2015
2:30 p.m. (coffee at 2:15 p.m.)
CEBAF Center, Room *F324/325 *

Chris Monahan
Rutgers University

*Going with the (Gradient) Low: Nucleon Structure and Power-Divergent 
Mixing on the Lattice*

The direct determination of Parton distribution functions (PDFs) from 
lattice QCD is an unsolved problem.
The traditional approach expresses moments of PDFs in terms of matrix 
elements of local operators, but
these operators suffer from power-divergent mixing that stems from the 
hypercubic symmetry of the lattice
regulator. I will introduce the gradient flow as a means to suppress 
this power-divergent mixing, at the expense
of introducing a new physical scale in the continuum. I will highlight 
two approaches to dealing with this new
scale that could ultimately lead to ab initio calculations of PDFs on 
the lattice.
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