Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectral change of sigma and omega mesons in a dense nuclear medium   The spectra of the scalar ($\sigma$) and vector ($\omega$) mesons in nuclear
matter are studied in detail using the quark-meson coupling (QMC) model. It is
shown that above normal nuclear matter density the effects of $\sigma$-$\omega$
mixing and the decay of the $\sigma$ into $2\pi$ change the spectra of $\sigma$
and $\omega$ mesons considerably. As in Quantum Hadrodynamics we find a
remarkable spectral change in the $\sigma$ meson and the longitudinal mode of
the $\omega$ meson, namely a two-peak structure.

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The categories of this paper are: cond-mat
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The categories of this paper are: mtrl-th
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: nlin
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The categories of this paper are: hep-th
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The categories of this paper are: astro-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: math
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The categories of this paper are: acc-phys
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The categories of this paper are: adap-org
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph