Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phase structures of neutral dense quark matter and application to
  strange stars   In the contact interaction model, the quark propagator has only one solution,
chiral symmetry breaking solution, at vanish temperature and density. Inspire
by Y. Jiang and Z.-F. Cui, we introduce 2+1 flavors quark condensates feedback
on coupling strength, the Wigner solution appears in some region of parameters.
It enables us to tackle chiral phase transition as two-phase coexistences. At
finite chemical potential, we analyze the chiral phase transition to the
conditions of electric charge neutrality and $\beta$ equilibrium. The four
chemical potentials, $\mu_u$, $\mu_d$, $\mu_s$ and $\mu_e$, are constrained by
three conditions, there is one independent variable that remained, we choose
the average quark chemical potential as the free variable. All quark masses and
number densities suffer discontinuities at the phase transition point. The
strange quarks appear after the phase transition due to the system needs more
energy to produce a d-quark than an s-quark. Take the EOS as an input, the TOV
equations are solved numerically, we show that the mass-radius relation is
sensitive to the EOSs. The maximum mass of strange quark stars is not
susceptible to our introduced parameter $\Lambda_q$.

25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th