Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mass spectra and Regge trajectories of light mesons in the
  Bethe-Salpeter approach   We extend the calculation of relativistic bound-states of a fermion
anti-fermion pair in the Bethe-Salpeter formalism to the case of total angular
momentum $J=3$. Together with results for $J \le 2$ this allows for the
investigation of Regge trajectories in this approach. We exemplify such a study
for ground and excited states of light unflavored mesons as well as strange
mesons within the rainbow-ladder approximation. For the $\rho$- and
$\phi$-meson we find a linear Regge trajectory within numerical accuracy.
Discrepancies with experiment in other channels highlight the need to go beyond
rainbow-ladder and to consider effects such as state mixing and more
sophisticated quark-antiquark interaction kernels.

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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
9
The categories of this paper are: nlin
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The categories of this paper are: stat
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci