Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of N* Production from J/Psi--> p pbar eta   Data are presented on the reaction J/psi--> p pbar eta using 7.8 million
J/psi triggers collected by the BEjing Spectrometer (BES). A partial wave
analysis is performed. A clear enhancement near the p eta(pbar eta) threshold
is observed. It is fitted with a JP=1/2- resonance with mass $M= 1530\pm 10$
MeV and width $\Gamma = 95\pm 25$ MeV. In addition, there is a peak around 1650
MeV with JP=1/2- preferred also, fitted with $M =1647\pm 20$ MeV and $\Gamma =
145^{+80}_{-45}$ MeV. These two N* resonances are believed to be the two well
established states, S11(1535) and S11(1650), respectively. It is the first
partial wave study of the production of these resonances from J/psi decays.

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The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
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The categories of this paper are: ao-sci
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
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The categories of this paper are: econ
2
The categories of this paper are: math
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The categories of this paper are: alg-geom