# The top-quark mass: challenges in definition and determination

## TL;DR

This paper discusses the challenges in defining and accurately measuring the top-quark mass at the LHC, emphasizing theoretical issues, measurement strategies, and recent progress in simulations.

## Contribution

It provides a comprehensive overview of the current methods, theoretical ambiguities, and recent advancements in top-quark mass determination and interpretation.

## Key findings

- Identification of key challenges in top-quark mass measurement
- Analysis of renormalon ambiguities affecting mass definitions
- Progress in Monte Carlo simulations improving measurement accuracy

## Abstract

The top-quark mass is a parameter of paramount importance in particle physics, playing a crucial role in the electroweak precision tests and in the stability of the Standard Model vacuum. I will discuss the main strategies to extract the top-quark mass at the LHC and the interpretation of the measurements in terms of well-posed top-mass definitions, taking particular care about renormalon ambiguities, progress in Monte Carlo event generators for top physics and theoretical uncertainties.