Precision measurement of the top-quark mass in lepton+jets final states

TL;DR

This paper reports the most precise measurement of the top-quark mass using lepton+jets final states from Fermilab Tevatron data, employing a matrix element technique and in situ jet energy scale calibration.

Contribution

It introduces a highly precise top-quark mass measurement method using full Tevatron Run II data and a matrix element approach with in situ calibration.

Findings

Top-quark mass measured as 174.98 ± 0.76 GeV

Achieved the most precise single measurement to date

Utilized matrix element technique with in situ W boson mass constraint

Abstract

We measure the mass of the top quark in lepton+jets final states using the full sample of $p\bar{p}$ collision data collected by the D0 experiment in Run~II of the Fermilab Tevatron Collider at $\sqrt s=1.96~$TeV, corresponding to $9.7~{\rm fb}^{-1}$ of integrated luminosity. We use a matrix element technique that calculates the probabilities for each event to result from $t\bar t$ production or background. The overall jet energy scale is constrained in situ by the mass of the $W$ boson. We measure $m_t=174.98\pm0.76~{\rm GeV}$. This constitutes the most precise single measurement of the top-quark mass.