Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutron Fraction and Neutrino Mean Free Path Predictions in Relativistic
  Mean Field Models   The equation of state (EOS) of dense matter and neutrino mean free path
(NMFP) in a neutron star have been studied by using relativistic mean field
models motivated by effective field theory (ERMF). It is found that the models
predict too large proton fractions, although one of the models (G2) predicts an
acceptable EOS. This is caused by the isovector terms. Except G2, the other two
models predict anomalous NMFP. In order to minimize the anomaly, besides an
acceptable EOS, a large M* is favorable. A model with large M* retains the
regularity in the NMFP even for a small neutron fraction.

24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio