Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $\sigma$ Meson In $J/\Psi$ Decays   Recently BES at BEPC found evidence for the existence of the $\sigma$ meson
in the process of $J/\Psi \to \sigma\omega \to\pi\pi\omega$. In this paper we
firstly discuss the relevant coupling $g_{\sigma\pi\pi}$ and show that the
linear $\sigma$ model gives rise to a reasonable description of the $\sigma$
decay into $\pi$'s, then we calculate the coupling constant
$g^{th}_{J/\Psi\sigma\omega}$ by using the perturbative QCD technique and the
light-cone wave functions of the $\sigma$ and $\omega$ mesons. The results show
that the theoretical value of $g^{th}_{J/\Psi\sigma\omega}$ is within the range
of experimental value $g_{J/\Psi\sigma\omega}$.

11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics