Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: QCD prediction for the non-$D\bar D$ annihilation decay of $\psi(3770)$   To clarify the marked difference between BES and CLEO measurements on the
non-$D\bar D$ decays of the $\psi(3770)$, a $1^{3}D_{1}$-dominated charmonium,
we calculate the annihilation decay of $\psi(3770)$ in NRQCD. By introducing
the color-octet contributions, the results are free from infrared divergences.
The color-octet matrix elements are estimated by solving the evolution
equations. The S-D mixing effect is found to be very small. With
$m_{c}=1.5\pm0.1\textrm{GeV}$ our result is $\Gamma(\psi(3770)\to \textrm{light
hadrons})=467^{-187}_{+338}\textrm{KeV}$. For $m_c=1.4$ GeV, together with the
observed hadronic transitions and E1 transitions, the non-$D\bar D$ decay
branching ratio of $\psi(3770)$ could reach about 5%. Our results do not favor
either of the results of BES and CLEO collaborations, and further experimental
tests are urged.

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The categories of this paper are: mtrl-th
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The categories of this paper are: physics
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The categories of this paper are: math-ph
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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: q-fin
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-th
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The categories of this paper are: cs
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The categories of this paper are: astro-ph
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The categories of this paper are: solv-int
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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: gr-qc
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The categories of this paper are: funct-an
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The categories of this paper are: cmp-lg