# Addendum to: A Theoretical Study of Top-Mass Measurements at the LHC Using NLO+PS Generators of Increasing Accuracy

## TL;DR

This paper extends previous work on top-mass measurements at the LHC by comparing results from older and newer NLO+PS generators, confirming consistency across different simulation tools.

## Contribution

It provides a comparative analysis of older Fortran-based and newer C++-based NLO+PS generators in top-mass extraction studies.

## Key findings

- Results are consistent across different generator versions.
- Older and newer generators yield similar top-mass measurement impacts.
- Supports robustness of NLO+PS methods in top physics.

## Abstract

This paper is a follow-up of Ref.~\cite{Ravasio:2018lzi}, where we studied the impact of next-to-leading order calculations merged with parton shower generators (NLO+PS) of increasing accuracy in the extraction of the top mass at hadron colliders. Here we examined results obtained with the older (fortran-based) shower generators Pythia6.4 and Herwig6.5. Our findings are in line with what we found in our previous paper with the new, c++-based, generators Pythia8.2 and Herwig7.1.