Quantifying the nucleon's pion cloud with transverse charge densities

Christian Weiss
JLab

The transverse densities in a fast--moving nucleon offer a 
model-independent framework for analyzing the spatial structure
of the pion cloud and its role in current matrix elements.
We calculate the chiral large-distance component of the charge 
density using a dispersion representation of the form factor and 
discuss its partonic interpretation. The non-chiral core is 
dominant up to surprisingly large distances ~2 fm. The chiral 
component can be probed in precision low-Q^2 elastic eN 
scattering or in peripheral deep-inelastic processes which 
resolve its quark/gluon content.