Speaker
Carlos Granados
(Uppsala University)
Description
Transverse densities describe the nucleon's spatial structure in the
parton picture and correspond to a projection of the GPDs in the impact
parameter representation. We use chiral effective field theory to
calculate the transverse charge and current densities in the nucleon's
chiral periphery (transverse distances b ~ 1/m_pi) and study their
properties [1]. The peripheral densities are expressed in terms of the
light-cone wave function of the chiral pion-nucleon system, calculable
directly from the chiral Lagrangian. A simple mechanical interpretation
of the peripheral densities is obtained in terms of the (classical) orbital
angular momentum structure of the system. We also extend these studies to
the peripheral transverse densities of matter and momentum, related to
the energy-momentum tensor form factors, and verify their relation to
moments of peripheral GPDs.
[1] C. Granados, C. Weiss, JHEP 1401 (2014) 092
Primary authors
Carlos Granados
(Uppsala University)
Christian Weiss
(Jefferson Lab)
