The MC@NLO 3.4 Event Generator
Stefano Frixione, Bryan R. Webber

TL;DR
The MC@NLO 3.4 event generator integrates next-to-leading order QCD calculations with parton shower simulations, enabling more accurate modeling of various particle production processes in high-energy physics experiments.
Contribution
This version introduces a practical implementation of the MC@NLO formalism within HERWIG, covering new processes and including spin correlations for most cases.
Findings
Includes multiple new particle production processes.
Incorporates spin correlations for most processes.
Provides a comprehensive manual for implementation.
Abstract
This is the user's manual of MC@NLO 3.4. This package is a practical implementation, based upon the HERWIG event generator, of the MC@NLO formalism, which allows one to incorporate NLO QCD matrix elements consistently into a parton shower framework. Processes available in this version include the hadroproduction of single vector and Higgs bosons, vector boson pairs, heavy quark pairs, single top, single top in association with a W, lepton pairs, and Higgs bosons in association with a W or Z. Spin correlations are included for all processes except ZZ and WZ production. This document is self-contained, but we emphasise the main differences with respect to previous versions.
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