Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anisotropic Goldstone bosons of strong-coupling lattice QCD at high
  density   We calculate the spectrum of excitations in strong-coupling lattice QCD in a
background of fixed baryon density, at a substantial fraction of the saturation
density. We employ a next-nearest-neighbor fermion formulation that possesses
the SU(N_f)xSU(N_f) chiral symmetry of the continuum theory. We find two types
of massless excitations: type I Goldstone bosons with linear dispersion
relations and type II Goldstone bosons with quadratic dispersion relations.
Some of the type I bosons originate as type II bosons of the nearest-neighbor
theory. Bosons of either type can develop anisotropic dispersion relations,
depending on the value of N_f and the baryon density.

15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat