Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bethe-Salpeter equations: mesons beyond the rainbow-ladder truncation   We investigate masses of light mesons from a coupled system of
Dyson--Schwinger (DSE) and Bethe--Salpeter equations (BSE), taking into account
dominant non-Abelian, sub-leading Abelian, and dominant pion cloud
contributions to the dressed quark-gluon vertex. The axial-vector
Ward-Takahashi identity preserving Bethe-Salpeter kernel is constructed and the
spectrum of light mesons calculated. Our model goes significantly beyond the
rainbow-ladder. We find that sub-leading Abelian corrections are further
dynamically suppressed, and that our results supersede early qualitative
predictions from simple truncation schemes.

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The categories of this paper are: cs
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The categories of this paper are: hep-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: ao-sci
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The categories of this paper are: physics
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The categories of this paper are: cond-mat
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The categories of this paper are: alg-geom
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The categories of this paper are: econ
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The categories of this paper are: stat
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The categories of this paper are: nucl-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int