IISc-CTS/03/01 LNF-01/008(P)

In this talk I briefly summarize different models for σ 2γ (e e → γγ → hadrons) and contrast model predictions with the data. I will then discuss the capability of the future ee and γγ colliders to distinguish between various models and end with an outlook for future work. 1) Talk presented by R.M.G. at LCWS 2000, Fermilab, Oct. 26-30, 2000 σ eeγγ at e +e− colliders R. M. Godbole∗ and G. Pancheri† Centre for Theoretical Studies, Indian Institute of Science, Bangalore, 560 012 INDIA Laboratori Nazionali di Frascati dell’INFN, Via E. Fermi 40, I 00044, Frascati, Italy Abstract. In this talk I briefly summarize different models for σ 2γ (e e → γγ → hadrons) and contrast model predictions with the data. I will then discuss the capability of the future ee and γγ colliders to distinguish between various models and end with an outlook for future work. In this talk I briefly summarize different models for σ 2γ (e e → γγ → hadrons) and contrast model predictions with the data. I will then discuss the capability of the future ee and γγ colliders to distinguish between various models and end with an outlook for future work.