Title: Two-gluon exchange contribution to elastic $gamma gamma to gamma gamma$ scattering and production of two-photons in ultraperipheral ultrarelativistic heavy ion and proton-proton collisions
Authors: M. Kłusek-Gawenda, W. Schäfer and A. Szczurek
Journal: Physics Letters B
Publication type: article
DOI: 10.1016/j.physletb.2016.08.059