A simple shower and matching algorithm

作者：Walter T. Giele, David A. Kosower, Peter Skands · 发表于：Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · 年份：2008 · DOI：10.1103/physrevd.78.014026 · 被引用次数：200 · 研究领域：Particle physics theoretical and experimental studies、High-Energy Particle Collisions Research、Quantum Chromodynamics and Particle Interactions

We present a simple formalism for parton-shower Markov chains. As a first step towards more complete ``uncertainty bands,'' we incorporate a comprehensive exploration of the ambiguities inherent in such calculations. To reduce this uncertainty, we then introduce a matching formalism which allows a generated event sample to simultaneously reproduce any infrared-safe distribution calculated at leading or next-to-leading order in perturbation theory, up to subleading corrections. To enable a more universal definition of perturbative calculations, we also propose a more general definition of the hadronization cutoff. Finally, we present an implementation of some of these ideas for final-state gluon showers, in a code dubbed Vincia.