Exclusive top production at a Linear Collider at and off the threshold

TL;DR

This paper reviews the theoretical predictions for exclusive top quark pair production at a future linear collider, covering both threshold and high-energy regions with advanced QCD calculations and resummation techniques.

Contribution

It provides a comprehensive analysis combining relativistic QCD-NLO calculations with nonrelativistic threshold resummation for top pair production at a linear collider.

Findings

Accurate cross section predictions near threshold and at higher energies.

Implementation of NLL threshold resummation improves theoretical precision.

Complete NLO matrix elements for $2\to 6$ processes with leptonic W decays.

Abstract

We review exclusive top pair production including decays at a future high-energy lepton collider, both in the threshold region and for higher energies. For the continuum process, we take complete QCD next-to-leading order matrix elements for the $2\to 6$ process with leptonic W decays into account. At threshold, we match the fixed-order relativistic QCD-NLO cross section to a nonrelativistic cross section with next-to-leading logarithmic (NLL) threshold resummation implemented via a form factor.