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Measurement of the top quark mass in the tt¯→dilepton channel from s=8 TeV ATLAS data
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8913-0981
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Number of Authors: 2857
2016 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 761, 350-371 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 761, 350-371 p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-197694DOI: 10.1016/j.physletb.2016.08.042ISI: 000384469900052ScopusID: 2-s2.0-84985010346OAI: oai:DiVA.org:kth-197694DiVA: diva2:1052950
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QC 20161207

Available from: 2016-12-07 Created: 2016-12-07 Last updated: 2017-02-24Bibliographically approved

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