Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Line shape of \psi(3770) in e^+e^-\to D\bar D   Interference phenomena observed in the $\psi(3770)$ resonance region in the
reactions $e^+e^-$ $\to$ $ D\bar D$ are analyzed. To avoid ambiguities in the
determination of the $\psi(3770)$ resonance parameters, when analyzing data
between the $D\bar D$ and $D\bar D\pi$ thresholds, the amplitudes satisfying
the elastic unitarity requirement should be used. In the lack of information on
the $P$ wave of $D\bar D$ elastic scattering, the $\psi(3770)$ parameters,
determined by fitting the $e^+e^-$ $\to $ $D\bar D$ data, can essentially
depend on the model used for the total contribution of the resonance and
background. The selection of the models can be toughened by comparing their
predictions with the relevant data on the shape of the $\psi(3770)$ peak in the
non-$D\bar D$ channels $e^+e^-$ $\to $ $\gamma\chi_{c0}$, $J/\psi\eta$,
$\phi\eta$, etc.

25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int