Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for heavy lepton resonances decaying to a $Z$ boson and a lepton
  in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector   A search for heavy leptons decaying to a $Z$ boson and an electron or a muon
is presented. The search is based on $pp$ collision data taken at $\sqrt{s}=8$
TeV by the ATLAS experiment at the CERN Large Hadron Collider, corresponding to
an integrated luminosity of 20.3 fb$^{-1}$. Three high-transverse-momentum
electrons or muons are selected, with two of them required to be consistent
with originating from a $Z$ boson decay. No significant excess above Standard
Model background predictions is observed, and 95% confidence level limits on
the production cross section of high-mass trilepton resonances are derived. The
results are interpreted in the context of vector-like lepton and type-III
seesaw models. For the vector-like lepton model, most heavy lepton mass values
in the range 114-176 GeV are excluded. For the type-III seesaw model, most mass
values in the range 100-468 GeV are excluded.

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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
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The categories of this paper are: astro-ph
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The categories of this paper are: adap-org
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The categories of this paper are: funct-an
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The categories of this paper are: q-fin
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The categories of this paper are: stat
1
The categories of this paper are: cs
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: q-bio