Matching next-to-leading order predictions to parton showers in supersymmetric QCD

TL;DR

This paper introduces an automated framework for simulating supersymmetric QCD processes at the LHC, combining NLO calculations with parton showers and particle decays, enhancing the accuracy of predictions.

Contribution

It provides a novel automated tool integrating FeynRules and MadGraph5 aMC@NLO for NLO simulations of supersymmetric QCD processes with full event generation.

Findings

Higher-order corrections significantly affect gluino pair-production predictions.

The framework enables precise modeling of supersymmetric particle events at the LHC.

Application to a benchmark scenario demonstrates practical utility.

Abstract

We present a fully automated framework based on the FeynRules and MadGraph5 aMC@NLO programs that allows for accurate simulations of supersymmetric QCD processes at the LHC. Starting directly from a model Lagrangian that features squark and gluino interactions, event generation is achieved at the next-to-leading order in QCD, matching short-distance events to parton showers and including the subsequent decay of the produced supersymmetric particles. As an application, we study the impact of higher-order corrections in gluino pair-production in a simplified benchmark scenario inspired by current gluino LHC searches.