Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The continuum and interference effect in $e^+e^-\to D^0\bar{D}^0,
  D^+D^-$ processes   In the $e^+e^-$ annihilation processes $e^+e^-\to D^0\bar{D}^0, D^+D^-$ near
or above the threshold of $D\bar{D}$, there are not only the resonance
contribution $e^+e^-\to \psi (3770)\to D^0\bar{D}^0, D^+D^-$, but also the
continuum contribution through virtual photon directly $e^+e^-\to \gamma^*\to
D^0\bar{D}^0, D^+D^-$. The amplitudes through virtual photon directly and
through resonance can interfere seriously. We consider the continuum and
interference effect in the $D\bar{D}$ production process in $e^+e^-$
annihilation. We find that the effect is significant near and above the
threshold of the $D\bar{D}$ mesons.

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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
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The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org
7
The categories of this paper are: hep-th