Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Energy Dependence of $\Lambda$ and $\bar{\Lambda}$ Production at
  CERN-SPS Energies   Rapidity distributions for $\Lambda$ and $\bar{\Lambda}$ hyperons in central
Pb-Pb collisions at 40, 80 and 158 A$\cdot$GeV and for ${\rm K}_{s}^{0}$ mesons
at 158 A$\cdot$GeV are presented. The lambda multiplicities are studied as a
function of collision energy together with AGS and RHIC measurements and
compared to model predictions. A different energy dependence of the
$\Lambda/\pi$ and $\bar{\Lambda}/\pi$ is observed. The $\bar{\Lambda}/\Lambda$
ratio shows a steep increase with collision energy. Evidence for a
$\bar{\Lambda}/\bar{\rm p}$ ratio greater than 1 is found at 40 A$\cdot$GeV.

27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph