Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A light plasmon mode in the color-flavor-locking phase   We calculate the spectral densities of electric and magnetic gluons at zero
temperature in color-superconducting quark matter in the color-flavor-locking
(CFL) phase. We find a collective excitation, a plasmon, at energies smaller
than two times the gap parameter and momenta smaller than about eight times the
gap. The dispersion relation of this mode exhibits a minimum at some nonzero
value of momentum, indicating a van Hove singularity.

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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-th
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The categories of this paper are: physics
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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex
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The categories of this paper are: cmp-lg
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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: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: math-ph
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The categories of this paper are: funct-an