Next Generation Multi-particle event generators for the MSSM

TL;DR

This paper introduces advanced multi-particle Monte Carlo event generators for the MSSM, enabling detailed simulations of supersymmetric phenomena at colliders with complex final states and background processes.

Contribution

It presents three new comprehensive simulation tools for MSSM collider phenomenology, incorporating complex features like spin correlations and real emission, with validation and initial physics analyses.

Findings

Agreement among the three programs in cross section calculations

Tables of cross sections provided as reference for future codes

First MSSM physics analyses using these tools

Abstract

We present a next generation of multi-particle Monte Carlo (MC) Event generators for LHC and ILC for the MSSM, namely the three program packages Madgraph/MadEvent, WHiZard/O'Mega and Sherpa/Amegic++. The interesting but difficult phenomenology of supersymmetric models at the upcoming colliders demands a corresponding complexity and maturity from simulation tools. This includes multi-particle final states, reducible and irreducible backgrounds, spin correlations, real emission of photons and gluons, etc., which are incorporated in the programs presented here. The framework of a model with such a huge particle content and as complicated as the MSSM makes strenuous tests and comparison of codes inevitable. Various tests show agreement among the three different programs; the tables of cross sections produced in these tests may serve as a future reference for other codes. Furthermore, first MSSM physics analyses performed with these programs are presented here.