Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Poincare covariant pseudoscalar and scalar meson spectroscopy in
  Wigner-Weyl phase   The coupled quark Dyson-Schwinger and meson Bethe-Salpeter equations in
rainbow-ladder truncation for spin-0 mesons are solved in Wigner-Weyl phase in
the chiral limit and beyond, retaining only the ultraviolet finite terms of the
phenomenologically most successful Maris-Tandy interaction. This allows to
reveal and discuss the scalar and pseudoscalar meson masses in a chirally
symmetric setting without additional medium effects. Independent of the
current-quark mass, the found solutions are spacelike, i.\,e.\ have negative
squared masses. The current-quark mass dependence of meson masses, leptonic
decay constants and chiral condensate are illustrated in Wigner-Weyl phase.

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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-ex
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The categories of this paper are: econ
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The categories of this paper are: supr-con
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The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
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The categories of this paper are: physics
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The categories of this paper are: atom-ph
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The categories of this paper are: nlin
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The categories of this paper are: math-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-th
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The categories of this paper are: comp-gas
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The categories of this paper are: astro-ph
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The categories of this paper are: eess