Measurements of the top quark mass using the ATLAS and CMS detectors at the LHC

TL;DR

This paper presents the latest top quark mass measurements from ATLAS and CMS at the LHC, using multiple methods and channels, and compares them to the world average, highlighting advances in precision and methodology.

Contribution

It provides new top quark mass measurements using diverse techniques and channels, including innovative observables, and combines results for improved accuracy.

Findings

Consistent top quark mass measurements across different channels.

Enhanced precision in top quark mass determination.

Comparison with the world average shows agreement within uncertainties.

Abstract

The latest measurements of the top quark mass obtained by the ATLAS and CMS experiments at the LHC for centre-of-mass energies of 7 and 8 TeV are presented. The mass of the top quark is measured using several methods and channels, including the reconstructed invariant mass distribution of the top quark and shapes of top quark decay distributions. Measurements based on the inclusive tt-bar cross section and novel observables based on the differential cross section in the tt-bar + 1 jet channel are also discussed. The results of the various channels are combined and compared to the world average.