Measurement of the top quark branching ratios into channels with leptons and quarks with the ATLAS detector

Abstract

Measurements of the branching ratios of top quark decays into leptons and jets using events with $t\overline{t}$ (top antitop) pairs are reported. Events were recorded with the ATLAS detector at the LHC in pp collisions at a center-of-mass energy of 7 TeV. The collected data sample corresponds to an integrated luminosity of 4.6 ${\mathrm{fb}}^{-1}$. The measured top quark branching ratios agree with the Standard Model predictions within the measurement uncertainties of a few percent.

33 pages plus author list (49 pages total), 11 figures, 9 tables, submitted to Physical Review D, all figures available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2014-01/

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• Measurements of the t-tbar production cross section in lepton+jets final states in pp collisions at 8 TeV and ratio of 8 to 7 TeV cross sections
• Determination of the top-quark mass from hadro-production of single top-quarks
• Top-quark physics at the Large Hadron Collider
• On Lepton Flavor Universality in Top Quark Decays
• Custodial Symmetry Breaking and Higgs Signatures at the LHC
• Measurement of the top quark pair production cross section in dilepton final states containing one $\tau$ lepton in pp collisions at $\sqrt{s}=$ 13 TeV
• NNLO PDFs driven by top-quark data
• A self-calibrating, double-ratio method to test tau lepton universality in W boson decays at the LHC