We investigate corrections to the handbag approach for wide-angle Compton scattering off protons at moderately large momentum transfer: the photon-parton subprocess is calculated to next-to-leading order in αs and contributions from the generalized parton distribution E are taken into account. Photon and proton helicity flip amplitudes are non-zero due to these corrections which leads to a weal...

A method for simulating radiative Bhabha scattering for configurations where one or both electrons do not scatter appreciably is presented. Double radiative Bhabha scattering is included by using the equivalent photon approximation. Results from a Monte Carlo event generator are shown for two experimental configurations. When an electron and photon scatter at large angles, the contribution from...

The application of two-photon excitation to fluorescence microscopy has become a powerful tool for studying biological function in live tissue and offers many advantages over conventional imaging techniques. Neuroscientists in particular have used this technology to image physiological functioning in microscopic and subcellular neural compartments. Neurons can be imaged deep within highly light...

The two-photon exchange contribution to the single spin asymmetries with the spin orientation normal to the reaction plane is discussed for elastic electron-proton scattering in the equivalent photon approximation. In this case, the hadronic part of the two-photon exchange amplitude describes real Compton scattering (RCS). We show that in the case of the beam normal spin asymmetry this approxim...

The electromagnetic response of a pinned Abrikosov fluxoid is examined in the framework of the Bogoliubov-de Gennes formalism. The matrix elements and the selection rules for both the single photon (emission absorption) and two photon (Raman scattering) processes are obtained. The results reveal striking asymmetries: light absorption by quasiparticle pair creation or single quasiparticle scatte...