Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The topological approach to baryon-antibaryon and meson production in
  rapidly expanding Bjorken rods   The topological approach to baryon-antibaryon production in the chiral phase
transition is numerically simulated for rapidly expanding hadronic systems. For
that purpose the dynamics of the effective chiral field is implemented on a
space - rapidity lattice. The essential features of evolutions from initial
'hot' configurations into final ensembles of (anti-)baryons embedded in the
chiral condensate are studied in proper time of comoving frames. Typical times
for onset and completion of the roll-down and exponents for the growth of
correlations are extracted. Meson and baryon-antibaryon yields are estimated.
For standard assumptions about initial coherence lengths they are compatible
with experimental results.

35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn