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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.ORCID iD: 0000-0003-3867-0336
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: 28572016 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 761, p. 350-371Article 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, p. 350-371
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Physical Sciences
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URN: urn:nbn:se:kth:diva-197694DOI: 10.1016/j.physletb.2016.08.042ISI: 000384469900052Scopus ID: 2-s2.0-84985010346OAI: oai:DiVA.org:kth-197694DiVA, id: diva2:1052950
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QC 20161207

Available from: 2016-12-07 Created: 2016-12-07 Last updated: 2019-12-04Bibliographically approved

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Lund-Jensen, BengtSidebo, P. EdvinStrandberg, Jonas

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