Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Femto-cyclones and hyperon polarization in Heavy-Ion Collisions   We study the structure of vorticity and hydrodynamic helicity fields in
peripheral heavy-ion collisions using the kinetic Quark-Gluon String Model. The
angular momentum conservation within this model holds with a good accuracy. We
observe the formation of specific toroidal structures of vorticity field
(vortex sheets). Their existence is mirrored in the polarization of hyperons of
the percent order.

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The categories of this paper are: gr-qc
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The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
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The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
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The categories of this paper are: hep-ex
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The categories of this paper are: solv-int
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The categories of this paper are: cs
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The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
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The categories of this paper are: econ
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The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
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The categories of this paper are: acc-phys