[Theory-seminars] Cake Seminar on Wednesday 01/30 2 p.m.

[Alexei Prokudin]

Dear all,

We have a Cake Seminar on Wednesday 30th of December

CEBAF Center, Room L104
2:00 p.m.

Speaker: Carlos Granados

Title: Chiral Dynamics and Transverse Peripheral Densities

Abstract:
We study the transverse charge and current densities in the periphery of 
the nucleon where they are governed by universal chiral dynamics. The 
large–distance asymptotics of the densities are derived from the 
spectral functions of the Dirac and Pauli form factors near the 
threshold at t = 4Mπ2 obtained from invariant chiral perturbation 
theory. In the equivalent light–front formulation, the peripheral 
densities arise from large–size  πN configurations in the nucleon’s 
light–front wave function obtained from the chiral Lagrangian. We 
compute the chiral component of the charge and current densities and 
explain their order–of–magnitude in the chiral expansion. We also 
discuss the role of πΔ intermediate states in the large Nc limit and the 
heavy–baryon expansion of peripheral densities, and comment on progress 
extending an analogous analysis concerning transverse densities from 
form factors of the energy-momentum tensor and its connections to 
studies on GPDs.


Cake sponsor: Christian


A complete list of upcoming theory seminars and talks from previous
seminars is available from:
http://www.jlab.org/div_dept/theory/seminars/

Alexei, Alvaro and Carlos
JLab Theory Seminar Organizers