LHEReader: Simplified Conversion from Les Houches Event Files to ROOT Format

Abstract

We present the \textsc{LHEReader} program that converts a Les Houches Event file into a \Root file, allowing one to subsequently analyse the file using \Root. We evaluate the performance of this conversion by simulating $pp\to jj$ and $e^{+}{e}^{-}\to ZH$. The application of this program is illustrated through the simulation of $pp\to ZH$ with $Z\to {\ell }^{+}{\ell }^{-}$ and $H\to b\bar{b}$, analysing the events at the parton level after hard-scatter event generation as well as after the fast simulation stage using \MadAnalysis. The analysis is implemented in \Root, demonstrating the use of this program. The program is available at https://github.com/amanmdesai/LHEReader