Speaker
Description
One of the foremost goals of research into Quantum Chromodynamics
(QCD) is to quantify the internal structure of the proton from
first principles. Ab initio calculations of QCD matrix elements
like transverse momentum distributions (TMDs) using lattice QCD
are an essential part of achieving that goal. I present first
explorations of effects on TMDs induced by the more intricate
color flows in hadron-hadron collisions compared to the standard
SIDIS and Drell-Yan processes. I analyze the correlations between
nucleon and pion two-point functions and Wilson loops computed in
lattice QCD. I consider Wilson loops of various shapes, and find
a correlation between the two-point function and Wilson loop
insertion which is significant and nonzero for narrow Wilson
loops with widths up to 3 lattice spacings (0.342 fm) for pions
and the nucleon. This disconnected quark contribution will be
combined in forthcoming work with connected three-point functions
containing non-standard Wilson gauge link structures, to assemble
the full modified TMD observables.
This research is supported by DOE Grant DE-FG02-96ER40965.
