${\sigma }_{ee\gamma \gamma }^{tot}$ at $e^{+}{e}^{-}$ colliders}

Abstract

In this talk I briefly summarize different models for ${\sigma }_{2\gamma }^{tot}$ ($e^{+}{e}^{-}\to \gamma \gamma \to$ hadrons) and contrast model predictions with the data. I will then discuss the capability of the future $e^{+}{e}^{-}$ and $\gamma \gamma$ colliders to distinguish between various models and end with an outlook for future work.

10 pages, 3 figures, LaTeX, uses aipproc.cls and aipproc.sty. Talk to appear in the proceedings of International Linear Collider Workshop (LCWS) 2000, October 26-30, 2000, Fermilab