Speaker
Prof.
Michael Kohl
(Hampton University)
Description
Hard two-photon exchange has been favored theoretically to explain the previously observed discrepancy in measurements of the elastic proton electric-to-magnetic form factor ratio with polarized and unpolarized methods. Several experiments have been carried out to investigate the effects of two-photon exchange. The OLYMPUS experiment at DESY has been one of three dedicated experiments to use comparisons of positron-proton and electron-proton scattering to unequivocally determine the effects of two-photon exchange. Results from the OLYMPUS experiment will be presented.
This work has been supported by the U.S. National Science Foundation and Department of Energy.
Primary author
Prof.
Michael Kohl
(Hampton University)
