Two-photon processes and production of charmed-quark-antiquark bound states

We investigate the possibility of observing even-charge-conjugation states of charmonium in the reaction $e^{+}+e^{-}\to e^{+}+e^{-}+X$. The cross sections for paracharmonium I and II are explicitly calculated to be ${10}^{-33\mathrm{}}$ ${\mathrm{cm}}^2$ to ${10}^{-35\mathrm{}}$ ${\mathrm{cm}}^2$ and depend on specific models. Cross sections for production of a pair of charmed bosons are also evaluated.