Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hardon-quark hybrid stars constructed by the nonlinear
  $\sigma$-$\omega$-$\rho$ mean-field model and MIT-bag model   Density-dependent relations among saturation properties of symmetric nuclear
matter and hyperonic matter, properties of hadron-(strange) quark hybrid stars
are discussed by applying the conserving nonlinear $\sigma$-$\omega$-$\rho$
hadronic mean-field theory. Nonlinear interactions that will be renormalized as
effective coupling constants, effective masses and sources of equations of
motion are constructed self-consistently by maintaining thermodynamic
consistency to the mean-field approximation. The coupling constants expected
from the hadronic mean-field model and SU(6) quark model for the vector
coupling constants are compared; the coupling constants exhibit different
density-dependent results for effective masses and binding energies of
hyperons, properties of hadron and hadron-quark stars. The nonlinear
$\sigma$-$\omega$-$\rho$ hadronic mean-field approximation with or without
vacuum fluctuation corrections and strange quark matter defined by MIT-bag
model are employed to examine properties of hadron-(strange) quark hybrid
stars. We have found that hadron-(strange) quark hybrid stars become more
stable in high density compared to pure hadronic and strange quark stars.

23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci