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Measurement of the top quark mass in the tt¯→dilepton channel from √s = 8 TeV ATLAS data

ContributorsATLAS Collaboration
Published inPhysics letters. B, vol. 761, p. 350-371
Collection
  • Open Access - SCOAP3
Publication date2016
Abstract

The top quark mass is measured in the tt¯→dilepton channel ( lepton=e,μ ) using ATLAS data recorded in the year 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 about 20.2 fb−1 . Exploiting the template method, and using the distribution of invariant masses of lepton– b-jet pairs, the top quark mass is measured to be mtop=172.99±0.41 (stat)±0.74 (syst) GeV , with a total uncertainty of 0.84 GeV . Finally, a combination with previous ATLAS mtop measurements from s=7 TeV data in the tt¯→dilepton and tt¯→lepton+jets channels results in mtop=172.84±0.34 (stat)±0.61 (syst) GeV , with a total uncertainty of 0.70 GeV .

Citation (ISO format)
ATLAS Collaboration. Measurement of the top quark mass in the tt¯→dilepton channel from √s = 8 TeV ATLAS data. In: Physics letters. B, 2016, vol. 761, p. 350–371. doi: 10.1016/j.physletb.2016.08.042
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ISSN of the journal0370-2693
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Creation09/02/2016 9:36:14 AM
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