Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: pi^0 Transverse Single-Spin Asymmetries at eta=4.1 in p+p Collisions at
  sqrt{s}=200 GeV   Large transverse single-spin asymmetries, A_{N}, have been observed in
forward hadron production at RHIC. STAR has reported precision measurements of
the x_{F}-p_{T} dependence of A_{N} for forward pi^0 production. Contrary to
expectation, the asymmetry does not fall with p_{T}. However, questions remain
about the trend at the lower end of the studied range, p_{T}~1 GeV/c. Analysis
of data from the 2008 RHIC run has extended the pi^0 data in the x_{F} > 0.4,
low p_{T} region. Preliminary results are reported.

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The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
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The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ