Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two pion electroproduction   We have extended a model for the $\gamma N\to \pi\pi N$ reaction to virtual
photons and selected the diagrams which have a $\Delta$ in the final state. The
agreement found with the $\gamma_v p\to\Delta^0\pi^+$ and $\gamma_v
p\to\Delta^{++}\pi^-$ reactions is good. The sensitivity of the results to
$N\Delta$ transition form factors is also studied. The present reaction,
selecting a particular final state, is an extra test for models of the
$\gamma_{v} N\to \pi\pi N$ amplitude.

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The categories of this paper are: astro-ph
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The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat