Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Probing the equation of state of neutron-rich matter with intermediate
  energy heavy-ion collisions   Nuclear reactions induced by stable and/or radioactive neutron-rich nuclei
provide the opportunity to pin down the equation of state of neutron-rich
matter, especially the density ($\rho$) dependence of its isospin-dependent
part, i.e., the nuclear symmetry energy $E_{\rm sym}$. A conservative
constraint, $32(\rho /\rho_{0})^{0.7} < E_{\rm sym}(\rho ) < 32(\rho /\rho
_{0})^{1.1}$, around the nuclear matter saturation density $\rho_0$ has
recently been obtained from the isospin diffusion data in intermediate energy
heavy-ion collisions. We review this exciting result and discuss its
consequences and implications on nuclear effective interactions, radii and
cooling mechanisms of neutron stars.

7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess