Automated simulations beyond the Standard Model: supersymmetry

TL;DR

This paper enhances the MadGraph5 aMC@NLO framework to automate simulations of supersymmetric models, incorporating new features for renormalisation and resonance handling, validated against existing tools and applied to LHC scenarios.

Contribution

It extends the FeynRules package for supersymmetry, introduces methods for narrow resonance subtraction, and provides validated, publicly available simulation tools for supersymmetric theories.

Findings

Validated total rate results against Prospino2 and Resummino.

Demonstrated applications to 13 TeV LHC data at total and differential levels.

Enhanced automation capabilities for supersymmetric model simulations.

Abstract

The MadGraph5 aMC@NLO framework aims to automate all types of leading- and next-to-leading-order-accurate simulations for any user-defined model that stems from a renormalisable Lagrangian. In this paper, we present all of the key ingredients of such models in the context of supersymmetric theories. In order to do so, we extend the FeynRules package by giving it the possibility of dealing with different renormalisation options that are relevant to supersymmetric models. We also show how to deal with the problem posed by the presence of narrow resonances, thus generalising the so-called on-shell subtraction approaches. We extensively compare our total rate results with those of both Prospino2 and Resummino, and present illustrative applications relevant to the 13 TeV LHC, both at the total-rate and differential levels. The computer programs that we have used to obtain the predictions presented here are all publicly available.