Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dispersion Laws for Goldstone Bosons in a Color Superconductor   The effective action for Goldstone bosons in the color-flavor locking phase
of dense QCD is analyzed. Interaction terms and higher derivatives in the
effective action appear to be controlled by different scales. At energies of
order of the superconducting gap, the derivative expansion breaks down, while
interactions still remain suppressed. The effective action valid at energies
and momenta comparable to the gap is derived. Dispersion laws following from
this action are such that the energy of Goldstone bosons is always smaller than
the gap in the quasiparticle spectrum, and Goldstone bosons always propagate
without damping.

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The categories of this paper are: chem-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-th
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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
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The categories of this paper are: q-bio
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The categories of this paper are: stat
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The categories of this paper are: funct-an
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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: comp-gas
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The categories of this paper are: quant-ph