Measurement of the top quark mass in topologies enhanced with single top quarks produced in the $t$-channel at $\sqrt{s}=8\,\mathrm{TeV}$ using the ATLAS experiment

TL;DR

This paper measures the top quark mass in single top quark production events at 8 TeV using the ATLAS detector, employing a template method based on the invariant mass distribution of lepton and b-jet, resulting in a precise mass estimate.

Contribution

It introduces a novel measurement of the top quark mass specifically in t-channel single top production events at 8 TeV with the ATLAS detector, using a template method for improved accuracy.

Findings

Measured top quark mass: 172.2 GeV

Statistical uncertainty: 0.7 GeV

Systematic uncertainty: 2.0 GeV

Abstract

A measurement of the top quark mass in topologies enhanced with single top quarks produced in the $t$-channel produced via weak interactions is presented. The dataset was collected at a centre-of-mass energy of $\sqrt{s}=8\,\mathrm{TeV}$ with the ATLAS detector at the LHC and corresponds to an integrated luminosity of $20.3\,\mathrm{fb^{-1}}$. To determine the top quark mass a template method is used based on the distribution of the invariant mass of the lepton and the $b$-tagged jet as estimator. The result of the measurement is $m_{\mathrm{top}} = 172.2 \pm 0.7 {\mathrm{(stat.)}} \pm 2.0 {\mathrm{(syst.)}}\,\mathrm{GeV}$.