Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of the rare decay $J/\psi\rightarrow e^+e^- \phi$   We study the decay process of $J/\psi\rightarrow e^+e^- \phi$ where the
relatively clean electromagnetic (EM) transitions appear at leading order at
tree level while the hadronic contributions only emerge via hadronic loop
transitions. We include the low-lying scalar $f_0(980)$ and pseudoscalar
$\eta/\eta'$ as the dominant contributions in the evaluation of the hadronic
loop contributions. It is found that the hadronic effects are negligible
comparing with the EM contributions. The decay width of $J/\psi\rightarrow
e^+e^- \phi$ is determined to be about $2.12\times 10^{-6}$ keV if there is no
any other leading mechanism contributing, and this result will be tested by the
BESIII experiment with a large data sample of $J/\psi$.

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The categories of this paper are: hep-lat
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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: stat
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
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The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas
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The categories of this paper are: astro-ph
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The categories of this paper are: math-ph
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The categories of this paper are: cs
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The categories of this paper are: adap-org
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The categories of this paper are: patt-sol