The absolute cross section for the + e"-*/-i + /x" reaction was measured in a 12~MeV total cm. energy range centered at the mass of the ? meson 0 We observe a deviation from the s" 1 dependence of the cross section predicted by quantum electrodynamics when hadronic modifications are neglected. A good fit to the data requires that one take into account y~*
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.