Third order Coulomb correction to ttbar threshold cross section

Abstract

We report on our result of third order Coulomb correction to the cross section sigma(ee -> ttbar) near threshold. Analytic expression for the Coulomb energy and wave function at the origin are obtained. We discuss the significance of the Coulomb correction to the threshold cross section and heavy quarkonium phenomenology.

Comments: To appear in the proceedings of the 7th International Symposium on Radiative Corrections(RADCOR05), Shonan Village, Japana Oct. 2005