Top quark couplings at ILC: six and eight fermion final states

Details Top quark couplings at ILC: six and eight fermion final states Top quark couplings at ILC: six and eight fermion final states

2004-12-02

arxiv.org/abs/hep-ph/0412028v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, LaTeX (feynmf.sty included); based on a talk given at the 2nd Workshop of the ECFA Study `Physics and Detectors for

Scientific paper

I discuss the calculation of cross sections for processes with six and eight fermions in the final state, contributing to single-top production and associated top-Higgs production at a linear collider. I describe the schemes for the treatment of finite decay widths implemented in the matrix element generator O'Mega and give a numerical comparison for single-top production. In the case of single top production, after reducing vector boson fusion backgrounds by appropriate cuts, the effect of including the full six fermion final state amounts to 2-5%. In associated top-Higgs production, non-resonant electroweak backgrounds are of a similar magnitude while QCD backgrounds are much larger.

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