Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Different space-time freeze-out picture -- an explanation of different
  $\Lambda$ and $\bar{\Lambda}$ polarization?   Thermal vorticity in non-central Au+Au collisions at energies $7.7 \leq
\sqrt{s} \leq 62.4$ GeV is calculated within the UrQMD transport model. Tracing
the $\Lambda$ and $\bar{\Lambda}$ hyperons back to their last interaction point
we were able to obtain the temperature and the chemical potentials at the time
of emission by fitting the extracted bulk characteristics of hot and dense
medium to statistical model of ideal hadron gas. Then the polarization of both
hyperons was calculated. The polarization of $\Lambda$ and $\bar{\Lambda}$
increases with decreasing energy of nuclear collisions. The stronger
polarization of $\bar{\Lambda}$ is explained by the different space-time
distributions of $\Lambda$ and $\bar{\Lambda}$ and by different freeze-out
conditions of both hyperons.

26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
2
The categories of this paper are: math