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HELAC - A Monte Carlo generator for multi-jet processes

C. G. Papadopoulos, M. Worek

TL;DR

The paper presents HELAC, a Monte Carlo event generator tackling tree-level SM multi-jet final states with an emphasis on full event simulation for current and future colliders like the LHC. It employs Dyson-Schwinger recursion to construct helicity amplitudes and uses Monte Carlo colour summation to manage combinatorial growth, achieving a $3^n$ scaling while maintaining exactness for interference effects. The tool provides phase-space sampling, event unweighting, and upstream compatibility with PYTHIA via the LHA standard, enabling complete showering and hadronisation. Numerical results at $\

Abstract

The status of the multi-purpose event generator HELAC is briefly presented. The aim of this tool is the full simulation of events within the Standard Model at current and future high energy experiments, in particular the LHC. Some results related to the production of multi-jet final states at the LHC are also discussed.

HELAC - A Monte Carlo generator for multi-jet processes

TL;DR

The paper presents HELAC, a Monte Carlo event generator tackling tree-level SM multi-jet final states with an emphasis on full event simulation for current and future colliders like the LHC. It employs Dyson-Schwinger recursion to construct helicity amplitudes and uses Monte Carlo colour summation to manage combinatorial growth, achieving a scaling while maintaining exactness for interference effects. The tool provides phase-space sampling, event unweighting, and upstream compatibility with PYTHIA via the LHA standard, enabling complete showering and hadronisation. Numerical results at $\

Abstract

The status of the multi-purpose event generator HELAC is briefly presented. The aim of this tool is the full simulation of events within the Standard Model at current and future high energy experiments, in particular the LHC. Some results related to the production of multi-jet final states at the LHC are also discussed.

Paper Structure

This paper contains 4 sections, 1 equation, 2 figures, 1 table.

Table of Contents

  1. Introduction
  2. Short description of the program
  3. Basic results
  4. Summary

Figures (2)

  • Figure 1: Transverse momentum distribution of the most (left panel) and the least (right panel) energetic gluon in the $gg\rightarrow 4g$ process with the MC summation over colour.
  • Figure 2: Rapidity distribution of the most (left panel) and the least (right panel) energetic gluon in the $gg\rightarrow 4g$ process with MC summation over colour.