Electron-positron pair creation in heavy ion collisions and bhabha scattering in the MeV range

Abstract

New results on the observation of monoenergetic electron-positron pairs in heavy ion collisions are reported. They indicate the creation of neutral particles in the strong Coulomb fields with masses of between 1.5 and 1.8 MeV/c², which decay into e⁺−e⁻ pairs. First results of the search for production of such particles in resonant Bhabha scattering are also discussed.