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Volume 297 - XXV International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2017) - WG3 Higgs and BSM Physics in Hadron Collisions
Search for vector like quarks and heavy resonances decaying to top quarks in ATLAS
C. Camincher* on behalf of the ATLAS collaboration
*corresponding author
Full text: pdf
Pre-published on: 2017 September 13
Published on: 2018 January 16
This document presents the recent results of the ATLAS experiment at the LHC concerning the $t\bar{t}$ resonance and vector-like quark searches.
A search for $t\bar{t}$ resonances at 13~TeV in proton-proton collisions data is performed in the lepton+jet final state and for boosted top topologies. A re-interpretation of the analysis performed with the data recorded at the center of mass energy of 8~TeV, is also presented, for a scalar resonant signal. A vector-like top pair production is also searched for, through three analyses where the vector-like quark decay to Zt, Ht or Wb. A comparison of those analyses is presented. In addition, vector-like quarks are searched via the same sign lepton topology. The results are presented as mass limits on the vector-like top branching ratio plane and as the cross section limit on the $T_{5/3}$ pair production.
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