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

2015/06/30 by G. Aad, ATLAS Collaboration, B. Abbott +98
Physics and Astronomy · #ATLAS experiment #Astrophysics #Atlas (anatomy) #Atlas detector #Branching fraction #Cosmology and Gravitation Theories #Detector #Electron #High-Energy Particle Collisions Research #Large Hadron Collider #Lepton #Luminosity #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quark #Top quark #hep-ex

paper · pdf · doi:10.1103/physrevd.92.072005

published as Phys. Rev. D 92, 072005 (2015) · 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/

openalex publication_date 2015/10/19 · arxiv created 2016/06/15 · arxiv updated 2016/06/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06

Abstract

Measurements of the branching ratios of top quark decays into leptons and jets using events with tt (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 fb^\ensuremath-1. The measured top quark branching ratios agree with the Standard Model predictions within the measurement uncertainties of a few percent.

Citations

• Single-top production in MC@NLO
• Electron reconstruction and identification efficiency measurements with the ATLAS detector using the 2011 LHC proton–proton collision data
• Measurement of the t-channel single-top-quark production cross section and of the |V tb| CKM matrix element in pp collisions at √(s) = 8 TeV
• A determination of parton distributions with faithful uncertainty estimation
• Search for a light charged Higgs boson in top quark decays in pp collisions at √ s = 7 TeV
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• The anti-ktjet clustering algorithm
• Combination oftt¯cross section measurements and constraints on the mass of the top quark and its decays into charged Higgs bosons
• HERWIG 6: an event generator for hadron emission reactions with interfering gluons (including supersymmetric processes)
• ALPGEN, a generator for hard multiparton processes in hadronic collisions
• Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
• Boosted decision trees as an alternative to artificial neural networks for particle identification
• Multiparton interactions in photoproduction at HERA