Effects of the t t-bar threshold in e+e- to t t-bar H

Abstract

In the region where the Higgs energy is large the process e+e- to t t-bar H is governed by nonrelativistic QCD dynamics and one has to employ effective theory methods to make first principles QCD predictions. In this talk we use the effective theory vNRQCD to compute the Higgs energy distribution at next-to-leading logarithmic approximation. It is shown that the corrections are particularly important for smaller c.m. energies.

Comments: Invited talk at 2005 International Linear Collider Workshop, Stanford Ca (LCWS05), PSN 0404, 6 pages, Latex, 4 eps figures, 1 table