Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Aspects of isentropic trajectories in chiral effective models   The evolution of the fireball in heavy ion collisions is an isentropic
process, meaning that it follows a trajectory of constant entropy per baryon in
the phase diagram of the strong interaction. Responsible for the collective
acceleration of the fireball is the speed of sound of the system, while
fluctuations of conserved charges are encoded in quark-number susceptibilities:
together, they leave their imprint in final observables. Here, this isentropic
evolution will be analysed within chiral effective models that account for both
chiral and center symmetry breaking, two central aspects of QCD. Our discussion
focusses on the impact on the isentropic trajectories of the treatment of
high-momentum modes, of the meson contribution to thermodynamics and of the
number of quark flavours.

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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
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The categories of this paper are: funct-an
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The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: plasm-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin