The generalized polarizabilities (GP) of proton at low c.m. energies were investigated in virtual Compton scattering (VCS). At momentum transfer Q 2 = 0.92 and 1.76 GeV2, the structure functions and the electric and magnetic GP were determined. The global behavior of electric GP did not follow a simple dipole form and indicated a strong falloff with Q 2. A paramagnetic contribution from πN intermediate states at higher Q2 compensated the dominance of a long-distance diamagnetic pion cloud at low Q2.
ASJC Scopus subject areas
- Physics and Astronomy(all)