# Study of Monte Carlo event generators for proton-proton collisions at LHC energies in the forward region

## TL;DR

This study compares various Monte Carlo event generators for proton-proton collisions at LHC energies, analyzing their predictions against experimental data in the forward region to evaluate their accuracy and differences.

## Contribution

It provides a comprehensive comparison of PYTHIA, EPOS, QGSJET, and SIBYLL generators against LHCb and TOTEM data in the forward region, highlighting their predictive differences.

## Key findings

- Most predictions are within the range of experimental measurements.
- Differences are mainly due to extrapolation from central pseudorapidity region.
- Generators generally perform well within the measured phase-space.

## Abstract

In this paper we present a comparative study between PYTHIA, EPOS, QGSJET, and SIBYLL generators. The global event observables considered are the charged energy flow, charged-particle distributions, charged-hadron production ratios and $V^{0}$ ratios. The study is performed in the LHCb and TOTEM fiducial phase-spaces on minimum bias simulated data samples for \emph{pp} collisions at $\sqrt{s} = 7$ TeV using reference measurements from the aforementioned experiments. In the majority of cases, the measurements are within a band defined by the most extreme predictions. The observed differences between the predictions and the measurements seem to be, in most part, caused by extrapolation from the central pseudorapidity region ($|\eta| \leq$ 2.5), in which the generators were mainly tuned.