Matching Parton Showers and Matrix Elements
Stefan Hoeche, Frank Krauss, Nils Lavesson, Leif Lonnblad,, Michelangelo Mangano, Andreas Schaelicke, Steffen Schumann
TL;DR
This paper compares various methods of integrating fixed-order matrix elements with parton showers, highlighting differences and similarities in their implementation for W-production at Tevatron and LHC.
Contribution
It provides a comparative analysis of CKKW and MLM schemes for combining matrix elements with parton showers across different generators and cascades.
Findings
Similar results across methods but with notable differences
Differences depend on the specific implementation and generator used
Guidance for choosing schemes in practical simulations
Abstract
We compare different procedures for combining fixed-order tree-level matrix element generators with parton showers. We use the case of W-production at the Tevatron and the LHC to compare different implementations of the so-called CKKW scheme and one based on the so-called MLM scheme using different matrix element generators and different parton cascades. We find that although similar results are obtained in all cases, there are important differences.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Superconducting Materials and Applications · High-Energy Particle Collisions Research