
We investigate the decay and the production mechanism of the resonance X(1812) recently observed in the $\jp\to��X(1812), X(1812)\to����$ at BESII. The decay widths of $X(1812)\to����'$,$ ����$,$ ����$,$ K^+K^-$,$ ��^+��^-$, $ ����$,$ K^{*+}K^{*-}$ and $��^+��^-$ are evaluated based on the scenario of the X(1812) as a candidate of $(\ksks)$ molecule. It turns out that the quark exchange mechanism plays an important role in the understanding of the large decay width for the $X(1812)\to����$. It is also found that the decay widths for $X(1812)\to����'$ and $����$ are enhanced by the quark exchange mechanism. These channels are suggested to be the tools to test the molecular scenario in experiment. The branching fraction of $Br(X\to����)$ is evaluated to be about 4.60%. Searches for additional evidence about the X(1812) in $\jp$ radiative decays are reviewed. In the molecular scenario, the X(1812) production rate is also evaluated to be $��(\jp\to��X)/��(\jp\to��K^{*+}K^{*-})=2.13^{+7.41}_{-1.85}$, which is close to the measured value $2.83\pm0.92$.
4 figures, 10 pages
High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), FOS: Physical sciences
High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), FOS: Physical sciences
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