Measurement of the Beam Spin Asymmetry and Double Spin Asymmetry in Polarized Virtual Compton Scattering at MAMI (Mainz).

Virtual Compton scattering off the proton has been studied at Q2 = 0.33 (GeV/c)2 at MAMI (Mainz, Germany). This paper reports two different experiments. The goal of the experiments is the measurement of the double polarized evector p → e′pvector ′γ reaction below pion production threshold and the (beam) single spin asymmetry for evector p → e′p′γ above the π0 threshold. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR]