Evaluation of the forward Compton scattering off protons: II. Spin-dependent amplitude and observables

Understand

The forward Compton scattering off the proton is determined by substituting the empirical total photoabsorption cross sections into dispersive sum rules.

• In addition to the spin-independent amplitude evaluated previously [Phys.
• Rev.
• D 92, 074031 (2015)], we obtain the spin-dependent amplitude over a broad energy range.