## Discovery potential of hidden charm baryon resonances via photoproduction    [PDF]

Yin Huang, Jun He, Hong-Fei Zhang, Xu-Rong Chen
In this work, we study the possibility to find the suggested $N^*_{c\bar{c}}$ and $\Lambda^*_{c\bar{c}}$ resonances with hidden charm with mass above 4 GeV and width smaller than 100 MeV in the photon-induced production. The cross sections for the photoproductions of hidden charmed resonances are predicted in the effective Lagrangian approach. With the vector meson dominance mechanism, the $N^*(4412)$ can be produced directly by photon excitation with total cross section about 1 nb. A hint of $N^*(4412)$ can be found in the old experimental data for the channel $\gamma p\to J/\psi p$, which is promising to be checked by the future experiment at JLab 12 GeV. The total cross sections for the productions of $N^*(4261)$ are about one oder smaller than the total cross sections for $N^*(4412)$ suppressed by the phase space. With Monte Carlo simulation, we estimate that about five thousands $N^*(4261)$ events per day can be produced in the channel $\gamma p\to \pi^+ K^-\Sigma^+$ with luminosity $10^{35}$ cm$^{-2}$/s. This results will be helpful to the experimental search for the hidden-charmed baryon resonances in the coming experiment at JLab 12 GeV, such as SoLID, and the proposed electron-ion colliders at FAIR and HIAF.
View original: http://arxiv.org/abs/1305.4434