Search for pair production of heavy vector-like quarks decaying into hadronic final states in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

The ATLAS collaboration
No Journal Information, 2018

Abstract (data abstract)
CERN-LHC, ATLAS. Results from a search for the pair production of heavy vector-like quarks, $T\bar T$ or $B\bar B$, that decay into final states with jets and no reconstructed leptons. Jets in the final state are classified using a deep neural network as arising from hadronically decaying $W/Z$ bosons, Higgs bosons, top quarks, or background. The analysis uses data from the ATLAS experiment corresponding to 36.1 fb$^{-1}$ of proton--proton collisions with a center-of-mass energy of $\sqrt{s}$ = 13 TeV delivered by the Large Hadron Collider in 2015 and 2016. No significant deviation from the Standard Model expectation is observed. Results are interpreted assuming the vector-like quarks decay into a Standard Model boson and a third-generation-quark, $T\rightarrow Wb,Ht,Zt$ or $B\rightarrow Wt,Hb,Zb$, for a variety of branching ratios.

  • Table 1

    Data from Figure 13 (a)

    10.17182/hepdata.83661.v1/t1

    Expected and observed upper limits at the 95% CL on the $T\bar T$ cross section as a function of $T$...

  • Table 2

    Data from Figure 13 (b)

    10.17182/hepdata.83661.v1/t2

    Expected and observed upper limits at the 95% CL on the $B\bar B$ cross section as a function of $B$...

  • Table 3

    Data from Figure 13 (c)

    10.17182/hepdata.83661.v1/t3

    Expected and observed upper limits at the 95% CL on the $B\bar B$ cross section as a function of $B$...

  • Table 4

    Data from Figure 14 (a) and (c)

    10.17182/hepdata.83661.v1/t4

    Expected and observed 95% CL lower limits on the mass of a vector-like $T$ quark in the branching-ratio plane.

  • Table 5

    Data from Figure 14 (b) and (d)

    10.17182/hepdata.83661.v1/t5

    Expected and observed 95% CL lower limits on the mass of a vector-like $B$ quark in the branching-ratio plane.

  • Table 6

    Data from Figure 20 (a) in auxiliary material

    10.17182/hepdata.83661.v1/t6

    Expected and observed upper limits at the 95% CL on the $T\bar T$ cross section as a function of $T$...

  • Table 7

    Data from Figure 20 (b) in auxiliary material

    10.17182/hepdata.83661.v1/t7

    Expected and observed upper limits at the 95% CL on the $B\bar B$ cross section as a function of $B$...

  • Table 8

    Data from Figure 20 (c) in auxiliary material

    10.17182/hepdata.83661.v1/t8

    Expected and observed upper limits at the 95% CL on the $B\bar B$ cross section as a function of $B$...

  • Table 9

    Data from Figure 20 (d) in auxiliary material

    10.17182/hepdata.83661.v1/t9

    Expected and observed upper limits at the 95% CL on the $B\bar B$ cross section as a function of $B$...

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