Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bulk hadron production at high rapidities   Recent experimental observations on the `bulk' features of particle
production at high (pseudo)rapidities will be reviewed. This kinematic region
is of interest mostly because of its relevance to the theoretical description
of initial state effects of nuclei at ultra-relativistic energies. Measurements
of the charged hadron multiplicity density as well as the pseudorapidity
dependence of the elliptic and directed flow exhibit a remarkable scaling
property as a function of collision energy. This scaling seems to hold for
pions and even photons and J/Psi-s, but is violated for protons. The special
role of baryons will be discussed using selected results on nuclear
transparency and baryon stopping.

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The categories of this paper are: physics
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
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The categories of this paper are: hep-th
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The categories of this paper are: astro-ph
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The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph