Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Singlet pairing gaps of neutrons and protons in hyperonic neutron stars   The $^{1}S_{0}$ nucleonic superfluids are investigated within the
relativistic mean-field model and Bardeen-Cooper-Schrieffer theory in hyperonic
neutron stars. The $^{1}S_{0}$ pairing gaps of neutrons and protons are
calculated based on the Reid soft-core interaction as the nucleon-nucleon
interaction. We have studied particularly the influence of hyperons degrees of
freedom on the $^{1}S_{0}$ nucleonic pairing gap in neutron star matter. It is
found that the appearance of hyperons has little impact on baryonic density
range and size for the $^{1}S_{0}$ neutronic pairing gap, the $^{1}S_{0}$
protonic pairing gap also decreases slightly in this region $\rho_B=0.0-0.393$
fm$^{-3}$. However, if baryonic density becomes greater than 0.393 fm${^{-3}}$,
the $^{1}S_{0}$ protonic pairing gap obviously increases. In addition, the
protonic superfluid range is obviously enlarged due to the presence of
hyperons. In our results, the hyperons change the $^{1}S_{0}$ protonic pairing
gap which must change the cooling properties of neutron stars.

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The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin