Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Systematics of parton fragmentation in $e^+$-$e^-$ and nuclear
  collisions   Parametrizations of fragmentation functions (FFs) from $e^+$-$e^-$ and p-\=p
collisions are combined with a parton spectrum model in a pQCD folding integral
to produce minimum-bias {\em fragment distributions}. A model of in-medium FF
modification is included. Calculated fragment distributions are compared with
{\em hard components} from p-p and Au-Au $p_t$ spectra. Data are well described
by pQCD over a large kinematic region for a range of Au-Au centralities.

18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga