Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The spectral function of the omega meson in nuclear matter from a
  coupled-channel resonance model   We calculate the spectral function of the omega meson in nuclear matter at
zero temperature by means of the low-density theorem. The omega N forward
scattering amplitude is calculated within a unitary coupled-channel effective
Lagrangian model that has been applied successfully to the combined analysis of
pion- and photon-induced reactions. While the peak of the omega spectral
distribution is shifted only slightly, we find a considerable broadening of the
omega meson due to resonance-hole excitations. For omega mesons at rest with
respect to the surrounding nuclear medium, we find an additional width of about
60 MeV at saturation density.

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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org
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The categories of this paper are: quant-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: chem-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: math-ph
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The categories of this paper are: hep-th
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The categories of this paper are: ao-sci
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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
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The categories of this paper are: nlin