Matching NLO QCD computations with Parton Shower simulations: the POWHEG method

TL;DR

This paper details the POWHEG method for combining NLO QCD calculations with parton shower simulations, enhancing the accuracy of collider event modeling.

Contribution

It provides a comprehensive description of the POWHEG method, applicable within different subtraction frameworks, and illustrates its application with specific collider processes.

Findings

Effective interfacing of NLO calculations with parton showers

Application to e+e- hadron production and Drell-Yan processes

Improved accuracy in collider event simulations

Abstract

The aim of this work is to describe in detail the POWHEG method, first suggested by one of the authors, for interfacing parton-shower generators with NLO QCD computations. We describe the method in its full generality, and then specify its features in two subtraction frameworks for NLO calculations: the Catani-Seymour and the Frixione-Kunszt-Signer approach. Two examples are discussed in detail in both approaches: the production of hadrons in e+e- collisions, and the Drell-Yan vector-boson production in hadronic collisions.