Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Deep sub-threshold $\Xi$ and $\Lambda$ production in nuclear collisions
  with the UrQMD transport model   We present results on deep sub threshold hyperon production in nuclear
collisions, with the UrQMD transport model. Introducing anti-kaon+baryon and
hyperon+hyperon strangeness exchange reactions we obtain a good description of
experimental data on single strange hadron production in Ar+KCl reactions at
$E_{lab}=1.76$ A GeV. We find that the hyperon strangeness exchange is the
dominant process contributing to the $\Xi^-$ yield, however remains short of
explaining the $\Xi^-/\Lambda$ ratio measured with the HADES experiment. We
also discuss possible reasons for the discrepancy with previous studies and the
experimental results, finding that many details of the transport simulation may
have significant effects on the final $\Xi^-$ yield.

19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph