Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Overview of PHENIX Results from the First RHIC Run   Results from the PHENIX experiment for the first RHIC run with Au-Au
collisions at a nucleon-nucleon center-of-mass energy of 130 GeV are presented.
The systematic variation with centrality of charged particle multiplicity,
transverse energy, elliptic flow, identified particle spectra and yield ratios,
and production of charged particles and neutral pions at high transverse
momenta are presented. Results on two-pion correlations and electron spectra
are also provided, along with a discussion of plans for the second run at RHIC.

7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom