Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anomalous Line-Shape of Cross Sections for $e^+e^- \to {\rm Hadrons}$ in
  the Center-of-Mass Energy Region between 3.650 and 3.872 GeV   We observe an obvious anomalous line-shape of the $e^+e^- \to {\rm hadrons}$
total cross sections in the energy region between 3.700 and 3.872 GeV from the
data samples taken with the BES-II detector at the BEPC Collider. Re-analysis
of the data shows that it is inconsistent with the explanation for only one
simple $\psi(3770)$ resonance with a statistical significance of $7\sigma$. The
anomalous line-shape may be explained by two possible enhancements of the
inclusive hadron production near the center-of-mass energies of 3.764 GeV and
3.779 GeV, indicating that either there is likely a new structure in addition
to the $\psi(3770)$ resonance around 3.773 GeV, or there are some physics
effects reflecting the $D\bar D$ production dynamics.

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The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph