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

TL;DR

This paper reports the most precise single measurement of the top-quark mass using a matrix element technique on the full Fermilab Tevatron data set, achieving a measurement of 174.98 GeV with high accuracy.

Contribution

It introduces a matrix element method combined with in situ jet energy scale calibration to improve the precision of top-quark mass measurement.

Findings

Top-quark mass measured as 174.98 ± 0.76 GeV.

Achieved the most precise single measurement of the top-quark mass.

Utilized full Tevatron Run II data set with advanced analysis techniques.

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 $m_t=174.98\pm0.76$ GeV. This constitutes the most precise single measurement of the top-quark mass.