Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Psi prime to J/psi Ratio Measurements in PHENIX at RHIC   The ratio of the $\psi'$ over the $J/\psi$ production cross section in the
dielectron channel has been measured in $\sqrt{s}=$ 200 GeV $p+p$ collisions
with the PHENIX detector at RHIC. The analysis is based on fitting of the
dielectron invariant mass spectra in the area around the $J/\psi$ and $\psi'$
signals in order to extract a ratio $\psi'$ over $J/\psi$ of 0.019$\pm
0.005($stat$)\pm 0.002($sys$)$ and a fractional feed-down contribution to
$J/\psi$ from $\psi^\prime$ of $8.6 \pm 2.5 %$.

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The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
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The categories of this paper are: gr-qc
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The categories of this paper are: eess
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The categories of this paper are: cond-mat
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The categories of this paper are: econ
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The categories of this paper are: ao-sci
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The categories of this paper are: q-bio
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The categories of this paper are: nlin
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-th