QCD radiation in the production of heavy colored particles at the LHC

TL;DR

This paper investigates the impact of QCD radiation on producing heavy colored particles at the LHC, demonstrating that matched matrix element and parton shower simulations improve prediction accuracy for new physics signals.

Contribution

It introduces a method of combining matrix elements with parton showers for better modeling of heavy particle production at the LHC, emphasizing its importance for beyond the Standard Model searches.

Findings

Matched samples are more accurate than pure parton showers.

Matching techniques are often essential for reliable BSM signal predictions.

Improved modeling aids in distinguishing new physics signals from backgrounds.

Abstract

We present a study of effects of QCD radiation in the production of heavy colored states, employing inclusive multi-jet samples obtained by matching matrix elements and parton showers. We discuss several examples showing that matched samples are in general not only more accurate than a parton shower alone, but also often indispensable to make reliable predictions of beyond the Standard Model signals.