Speaker
Andrey Tarasov
(North Carolina State University)
Description
The chiral anomaly in polarized deeply inelastic scattering manifests itself as an infrared pole of the box diagram in exact off-forward kinematics. The mechanism of the pole regularization is extremely subtle. I will show that such mechanism in QCD is fundamentally different from QED where the anomaly pole vanishes for finite lepton mass. Instead in QCD the mechanism has to do with the physics of the chiral anomaly and the topology of the QCD vacuum, which allows to relate the net quark helicity to the slope of the topological susceptibility of the QCD vacuum.
Primary authors
Andrey Tarasov
(North Carolina State University)
Raju Venugopalan
(BNL)
