Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Screening masses in neutral two-flavor color superconductor   The Debye and Meissner screening masses of the gluons and the photon in
neutral and beta-equilibrated dense two-flavor quark matter are calculated. The
results are presented in a general form that can be used in gapped as well as
gapless color superconducting phases. The results for the magnetic screening
masses indicate that the system develops a chromomagnetic instability. Possible
consequences of the instability are discussed.

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The categories of this paper are: cs
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: econ
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-th
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The categories of this paper are: mtrl-th
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The categories of this paper are: physics
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: cond-mat
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The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga
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The categories of this paper are: gr-qc
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The categories of this paper are: eess
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The categories of this paper are: hep-lat