Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Meson propagators in spontaneously broken gauge theories   Contrary to common belief, the longitudinal vector meson and scalar meson
propagators have very different forms in spontaneously broken gauge theories.
We choose the Abelian-Higgs model as an example and show that the longitudinal
vector meson and scalar meson propagators have double poles by an extensive use
of the Ward-Takahashi identities.

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The categories of this paper are: astro-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
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The categories of this paper are: econ
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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: chem-ph
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The categories of this paper are: supr-con
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The categories of this paper are: patt-sol
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The categories of this paper are: cs
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The categories of this paper are: math
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The categories of this paper are: eess