Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pion Form Factor in the Light-Front   The pion electromagnetic form factor is calculated with a light-front quark
model. The "plus" and "minus" component of the electromagnetic current are used
to calculate the electromagnetic form factor in the Breit frame with two models
for the q\bar{q} vertex. The light front constituent quark models describes
very well hadronic wave function for pseudo-scalar and vector particles.
Symmetry problems arinsing in the light-front approach are solved by the pole
dislocation method. The results are compared with new experimental data and
with other quark models.

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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
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The categories of this paper are: alg-geom
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The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
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The categories of this paper are: q-bio
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The categories of this paper are: nlin