Measurement of the top quark mass in the t(t)over-bar → dilepton channel from √s=8TeVATLAS data



Aaboud, M, Aad, G, Abbott, B, Abdallah, J, Abdinov, O, Abeloos, B, Aben, R, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2847 more authors) (2016) Measurement of the top quark mass in the t(t)over-bar → dilepton channel from √s=8TeVATLAS data PHYSICS LETTERS B, 761. pp. 350-371. ISSN 0370-2693, 1873-2445

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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 m<inf>top</inf>=172.99±0.41 (stat)±0.74 (syst) GeV, with a total uncertainty of 0.84 GeV. Finally, a combination with previous ATLAS m<inf>top</inf> measurements from s=7 TeV data in the tt¯→dilepton and tt¯→lepton+jets channels results in m<inf>top</inf>=172.84±0.34 (stat)±0.61 (syst) GeV, with a total uncertainty of 0.70 GeV.

Item Type: Article
Additional Information: 18 pages plus author list + cover pages (36 pages total), 3 figures, 2 tables. Submitted to PLB. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2016-03/
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 04 Nov 2016 11:18
Last Modified: 24 Jun 2026 13:14
DOI: 10.1016/j.physletb.2016.08.042
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3003899
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