Observation of Three Charmoniumlike States with $J^{PC}=1^{--}$ in $e^{+}{e}^{-}\to D^{\ast 0}{D}^{\ast -}{\pi }^{+}$

The Born cross sections of the process $e^{+}{e}^{-}\to D^{\ast 0}{D}^{\ast -}{\pi }^{+}$ at center-of-mass energies from 4.189 to 4.951 GeV are measured for the first time. The data samples used correspond to an integrated luminosity of $17.9{\mathrm{f}\mathrm{b}}^{-1}$ and were collected by the BESIII detector operating at the BEPCII storage ring. Three enhancements around 4.20, 4.47 and 4.67 GeV are visible. The resonances have masses of $4209.6\pm 4.7\pm 5.9\mathrm{M}\mathrm{e}\mathrm{V}\mathrm{/}{c}^2$, $4469.1\pm 26.2\pm 3.6\mathrm{M}\mathrm{e}\mathrm{V}\mathrm{/}{c}^2$ and $4675.3\pm 29.5\pm 3.5\mathrm{M}\mathrm{e}\mathrm{V}\mathrm{/}{c}^2$ and widths of $81.6\pm 17.8\pm 9.0\mathrm{M}\mathrm{e}\mathrm{V}$, $246.3\pm 36.7\pm 9.4\mathrm{M}\mathrm{e}\mathrm{V}$, and $218.3\pm 72.9\pm 9.3\mathrm{M}\mathrm{e}\mathrm{V}$, respectively, where the first uncertainties are statistical and the second systematic. The first and third resonances are consistent with the $\psi (4230)$ and $\psi (4660)$ states, respectively, while the second one is compatible with the $\psi (4500)$ observed in the $e^{+}{e}^{-}\to K^{+}{K}^{-}J\mathrm{/}\psi$ process. These three charmoniumlike $\psi$ states are observed in $e^{+}{e}^{-}\to D^{\ast 0}{D}^{\ast -}{\pi }^{+}$ process for the first time.