Low-energy theorem for virtual compton scattering and generalized sum rules of the nucleon.
We formulate the low-energy theorem for virtual Compton scattering off a nucleon and examine its consequences for generalized nucleon polarizabilites. As a result of a new, model-independent definition of the low-energy limit for doubly virtual Compton scattering, all generalized sum rules of the nucleon have a continuous limit for real photons and obtain contributions from the t channel that were not included previously.
Physics Department and Nuclear Theory Center, Indiana University, Bloomington, Indiana 47403, USA.
Mikhail
M
Gorchtein
Adam P
AP
Szczepaniak