First determination of the charge-averaged $e^\pm$-p cross section

Proton form factors are a touchstone for our understanding of nucleon structure. While new experiments are advancing the precision frontier, their interpretation is hampered by the uncertainty in two-photon exchange corrections. We present here the first high-precision determination of the charge-averaged $e^\pm$-proton cross section, where two-photon exchange is suppressed in first order. The data were taken by the OLYMPUS collaboration to directly measure two-photon-exchange corrections via the cross section ratio, but careful analysis allowed us to extract the cross sections themselves. The data cover a highly interesting kinematic region where $G_M/G_\rm{std.\ dip.}$ exhibits a threshold/turn-over behavior in current fits and will have significant impact on form factor extractions.