Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for the production of single vector-like and excited quarks in
  the $Wt$ final state in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS
  detector   A search for vector-like quarks and excited quarks in events containing a top
quark and a $W$ boson in the final state is reported here. The search is based
on $20.3 {fb}^{-1}$ of proton--proton collision data taken at the LHC at a
centre-of-mass energy of 8 TeV recorded by the ATLAS detector. Events with one
or two leptons, and one, two or three jets are selected with the additional
requirement that at least one jet contains a $b$-quark. Single-lepton events
are also required to contain at least one large-radius jet from the hadronic
decay of a high-$p_\mathrm{T}$ $W$ boson or a top quark. No significant excess
over the expected background is observed and upper limits on the cross-section
times branching ratio for different vector-like quark and excited-quark model
masses are derived. For the excited-quark production and decay to $Wt$ with
unit couplings, quarks with masses below 1500 GeV are excluded and
coupling-dependent limits are set.

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The categories of this paper are: eess
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: dg-ga
1
The categories of this paper are: cs
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The categories of this paper are: hep-lat
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The categories of this paper are: alg-geom
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The categories of this paper are: econ
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The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph