Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Antideuteron and antihelion production in root(s) = 130 GeV Au+Au
  collisions   The first measurements of light antinucleus production in Au+Au collisions at
RHIC are reported. The observed production rates for antideuterons and
antihelions are much larger than in lower energy nucleus-nucleus collisions. A
coalescence model analysis of the yields indicates that there is little or no
increase in the antinucleon freeze-out volume compared to collisions at SPS
energy. These analyses also indicate that the antihelion freeze-out volume is
smaller than the antideuteron freeze-out volume.

31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol