Measurement of the top quark mass with the template method in the top antitop -> lepton + jets channel using ATLAS data

Abstract

The top quark mass has been measured using the template method in the top antitop -> lepton + jets channel based on data recorded in 2011 with the ATLAS detector at the LHC. The data were taken at a proton-proton centre-of-mass energy of sqrt(s) = 7 TeV and correspond to an integrated luminosity of 1.04/fb. The analyses in the electron + jets and muon + jets decay channels yield consistent results. The top quark mass is measured to be m_top = 174.5 +/- 0.6_stat +/- 2.3_syst GeV.

arXiv comment19 pages plus author list (34 pages total), 10 figures, 2 tables, revised author list, final version to appear in European Physical Journal C

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• Jet energy measurement and its systematic uncertainty in proton-proton collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
• Combination of the top-quark mass measurements from the Tevatron collider
• Measurement of the $t\bar{t}$ production cross-section using $e\mu$ events with $b$-tagged jets in $pp$ collisions at $\sqrt{s}=7$ and 8 TeV with the ATLAS detector
• A likelihood-based reconstruction algorithm for top-quark pairs and the KLFitter framework
• Measurement of the top quark mass in the $t\bar{t}\to$ lepton+jets channel from $\sqrt{s}=8$ TeV ATLAS data and combination with previous results
• Measurements of top quark pair relative differential cross-sections with ATLAS in pp collisions at sqrt(s) = 7 TeV
• Measurement of the top-quark mass in t t-bar events with lepton+jets final states in pp collisions at sqrt(s) = 7 TeV
• Measurement of the top quark mass in the $t\bar{t}\to \mathrm{lepton}+\mathrm{jets}$ and $t\bar{t}\to \mathrm{dilepton}$ channels using $\sqrt{s}=7$ TeV ATLAS data
• Measurement of masses in the t t-bar system by kinematic endpoints in pp collisions at sqrt(s) = 7 TeV
• On the combination of correlated estimates of a physics observable
• Measurement of the top-quark mass in all-jets t t-bar events in pp collisions at sqrt(s) = 7 TeV
• Measurement of jet shapes in top pair events at sqrt(s) = 7 TeV using the ATLAS detector
• Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at $\sqrt{s}=7$ TeV
• Fragmentation Uncertainties in Hadronic Observables for Top-quark Mass Measurements
• Better Hadronic Top Quark Polarimetry
• Top physics at the LHC
• Confluence of Constraints in Gauge Mediation: The 125 GeV Higgs Boson and Goldilocks Cosmology
• Top-quark physics at the Large Hadron Collider
• The Linear Template Fit
• Properties of the Top Quark
• Tricritical Point in Quantum Phase Transitions of the Coleman-Weinberg Model at Higgs Mass
• Top-quark mass measurements at the LHC
• Improving Combinatorial Ambiguities of ttbar Events Using Neural Networks
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• Recent results on Top quark Physics with the ATLAS and CMS experiments
• Recent studies of top quark properties and decays at hadron colliders
• Top-Quark Mass Measurement in the Dilepton Channel Using {\it in situ} Jet Energy Scale Calibration