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

, The ATLAS collaboration (2016) Measurement of the top quark mass in the tt¯ → dilepton channel from √s=8 TeV ATLAS data. Physics Letters B, 761. pp. 350-371. ISSN 0370-2693

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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.

Item Type:
Journal Article
Journal or Publication Title:
Physics Letters B
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
81834
Deposited By:
Deposited On:
28 Sep 2016 15:26
Refereed?:
Yes
Published?:
Published
Last Modified:
24 Nov 2020 04:35