Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurements of Hard-Scattering by PHENIX at RHIC   Hard-scattering in p-p collisions was discovered in 1972 at the CERN-ISR, the
first hadron collider. Techniques were developed and several hard-processes
were discovered which form the basis for many of the measurements made in p-p
and Au+Au collisions at RHIC. Recent measurements of hard-scattering and
related reactions by the PHENIX experiment at RHIC are presented in this
context.

9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int