Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurements of $e p \to e' \pi^+ \pi^- p'$ Cross Sections with CLAS at
  $1.40 < W < 2.0$ GeV and $2.0 < Q^2 < 5.0$ GeV$^2$   This paper reports new exclusive cross sections for $e p \to e' \pi^+ \pi^-
p'$ using the CLAS detector at Jefferson Laboratory. These results are
presented for the first time at photon virtualities 2.0 GeV^2 < Q^2 < 5.0 GeV^2
in the center-of-mass energy range 1.4 GeV < W < 2.0 GeV, which covers a large
part of the nucleon resonance region. Using a model developed for the
phenomenological analysis of electroproduction data, we see strong indications
that the relative contributions from the resonant cross sections at W < 1.74
GeV increase with $Q^2$. These data considerably extend the kinematic reach of
previous measurements. Exclusive $e p \to e' \pi^+ \pi^- p'$ cross section
measurements are of particular importance for the extraction of resonance
electrocouplings in the mass range above 1.6 GeV.

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The categories of this paper are: supr-con
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The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-ex
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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: chem-ph
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The categories of this paper are: q-bio
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: stat
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The categories of this paper are: acc-phys
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The categories of this paper are: ao-sci
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The categories of this paper are: comp-gas
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The categories of this paper are: mtrl-th