Speaker
Michael Engelhardt
(New Mexico State University)
Description
Lattice QCD calculations of transverse momentum-dependent
parton distributions (TMDs) in a nucleon are performed
based on a definition of TMDs via hadronic matrix elements
of quark bilocal operators containing staple-shaped gauge
connections. A parametrization of the matrix elements in
terms of invariant amplitudes serves to cast them in the
Lorentz frame preferred for the lattice calculation. Using
a RBC/UKQCD domain wall fermion ensemble corresponding to
a pion mass of 297 MeV, on a lattice with spacing 0.084 fm,
selected TMD observables are accessed and compared to previous
explorations at heavier pion masses on coarser lattices.
Primary author
Michael Engelhardt
(New Mexico State University)
