# Measurements of the Top Quark Mass at D0

## TL;DR

This paper reports precise measurements of the top quark mass and its mass difference with the antitop quark using data from the D0 experiment at Fermilab, covering dilepton and lepton+jets channels.

## Contribution

It provides new top quark mass measurements and the first observation of the mass difference between t and tbar quarks in specific decay channels.

## Key findings

- Top quark mass measured with high precision.
- Mass difference between t and tbar observed.
- Results consistent with Standard Model expectations.

## Abstract

We present measurements of the top quark mass based on 3.6 fb^-1 of data collected by the D0 experiment during Run II of the Fermilab Tevatron collider. We present results in the dilepton and lepton+jets final states. We also present the measurement of the mass difference between t and tbar quarks observed in lepton+jets final states of ttbar events in 1 fb^-1 of data.