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Measurement of the top quark mass in the tt¯→ lepton+jets channel from √s = 8 TeV ATLAS data and combination with previous results

ContributorsATLAS Collaboration
Collection
  • Open Access - SCOAP3
Publication date2019
Abstract

The top quark mass is measured using a template method in the tt¯→lepton+jets channel (lepton is e or μ) using ATLAS data recorded in 2012 at the LHC. The data were taken at a proton–proton centre-of-mass energy of √s = 8 TeV and correspond to an integrated luminosity of 20.2 fb−1. The tt¯→lepton+jets channel is characterized by the presence of a charged lepton, a neutrino and four jets, two of which originate from bottom quarks (b). Exploiting a three-dimensional template technique, the top quark mass is determined together with a global jet energy scale factor and a relative b-to-light-jet energy scale factor. The mass of the top quark is measured to be mtop=172.08±0.39(stat)±0.82(syst) GeV. A combination with previous ATLAS mtop measurements gives mtop=172.69±0.25(stat)±0.41(syst) GeV.

Citation (ISO format)
ATLAS Collaboration. Measurement of the top quark mass in the tt¯→ lepton+jets channel from √s = 8 TeV ATLAS data and combination with previous results. In: The European Physical Journal. C, Particles and Fields, 2019, vol. 79, n° 4, p. 290. doi: 10.1140/epjc/s10052-019-6757-9
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Article (Published version)
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ISSN of the journal1434-6044
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Creation04/01/2019 10:41:38 AM
First validation04/01/2019 10:41:38 AM
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