Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pion Production in Rare Isotope Collisions   Pion energy spectra are presented for central collisions of neutron-rich
132Sn+124Sn and neutron-deficient 108Sn+112Sn systems using simulations with
Boltzmann-Uehling-Uhlenbeck transport model. These calculations, which
incorporate isospin-dependent mean field potentials for relevant baryons and
mesons, display a sensitivity to the pion spectra that could allow significant
constraints on the density dependence of the symmetry energy and its mean field
potential at supra-saturation densities. The predicted sensitivity increases
with the isospin asymmetry of the total system and decreases with incident
energy.

10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph