Production of charmed baryon $��_c(2940)$ by kaon-induced reaction on a proton target

We investigate the possibility to study the charmed baryon $��_c(2940)$ by kaon-induced reaction on a proton target. By assuming the $��_c(2940)$ as a $pD^{*0}$ molecular state with spin-parity $J^{p}=1/2^{\pm}$, an effective Lagrangian approach was adopted to calculate the cross section, the $D^0p$ invariant mass spectrum and Dalitz plot of the $��(2940)$ production. The total cross section of the $K^{-}p\to��_c(2940)D_s^{-}$ reaction is found at an order of magnitude about 10 $��$b. By considering the sub sequential decay $��_c(2940)\to{}D^0p$ with contributions from the $��_c(2286)$ and the $��_c(2455)$ as background, the $K^{-}p\to{}D_{s}^{-}D^{0}p$ reaction are studied. It is found that the $��_c(2940)$ is produced mainly at forward angles. The $��_c(2940)$ signal is predicted to be significant in the $D^0p$ invariant mass spectrum and the Dalitz plot of the $K^{-}p\to{}D_{s}^{-}D^{0}p$ reaction. The results suggest that it is promising to study the $��_c(2940)$ with high-energy kaon beam on a proton target in experiment.
6 pages, 6 figures