Single-top production in MC@NLO
S. Frixione, E. Laenen, P. Motylinski, B. R. Webber
TL;DR
The paper addresses producing realistic, fully-differential single-top cross sections by matching NLO QCD calculations with parton-shower Monte Carlo simulations using the MC@NLO framework. It extends MC@NLO to handle final-state collinear singularities, enabling a practical implementation for a process with both initial- and final-state singularities. It introduces MC subtraction terms and minor formalism adjustments to ensure numerical stability, and demonstrates that other processes can be added to MC@NLO without new analytic work. Results for Tevatron predictions are presented, establishing feasibility and paving the way for LHC studies and broader applications.
Abstract
We match next-to-leading order QCD results for single-top hadroproduction with parton shower Monte Carlo simulations, according to the prescription of the MC@NLO formalism. In this way, we achieve the first practical implementation in MC@NLO of a process that has both initial- and final-state collinear singularities. We show that no difficulties of principle arise from this complication, and present selected results relevant to the Tevatron.