Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of the symmetry energy and hyperon interaction on neutron stars   The joint effect of the density dependence of the symmetry energy and
strangeness content on the structure of cold neutron stars is studied within
the framework of a relativistic mean field theory. It is shown that 2$M_\odot$
are obtained for repulsive $YY$ interaction and preferably for a small or a
large slope $L$. An attractive $\Sigma$ potential in nuclear matter will favor
the appearance of strangeness in stars with a mass as small as $\sim 1
M_\odot$, if, however it is repulsive only stars with a mass $\gtrsim 1.4
M_\odot$ will contain strangeness. The joint effect of reducing the symmetry
energy slope and including hyperons is to farther reduce the radius. Neutron
star maximum mass evolve non-monotonically with the symmetry energy slope, and
the smallest masses are obtained for values $L\sim 80$ MeV. Other neutron star
variables evolve nonlinearly with the slope of the symmetry energy and depend
on the hyperon-nucleon and hyperon-hyperon couplings. The radius of a neutron
star is linearly correlated with the neutron star total strangeness fraction
and the slope is independent of the slope of the symmetry energy and the mass
of the star.

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The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
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The categories of this paper are: econ
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
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The categories of this paper are: solv-int