Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Background to Higgs-boson searches from internal conversions of
  off-shell photons associated with $Z/\gamma ^*$-boson production at the LHC   This paper presents the studies of the background contribution to the $H
\rightarrow 4l$ searches originating from the processes of off-shell (virtual)
photon emissions and their conversions into lepton pairs accompanying the
production of $Z/ \gamma ^*$-bosons at the LHC. They extend the analyses of the
irreducible background presented in the ATLAS and CMS Higgs papers by taking
into account the emissions of off-shell photons by parton showers. Including
these effects does not change significantly the Higgs-searches background
level, provided that the transverse momentum of each of the final-state leptons
is restricted to the range of $p_{T, l} > 7$ GeV. In the kinematical region
extended towards lower lepton transverse momenta the parton-shower contribution
becomes important. A measurement method for pinning down the parton-shower
effects is proposed.

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The categories of this paper are: hep-th
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The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
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The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an