We analyze the cross section of $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\psi (3686)$ measured at the Belle, BABAR, and BESIII experiments. Besides the well-known $Y(4360)$ and $Y(4660)$ resonances, evidence is found for another resonant structure in the low mass region. By fitting the structure with a Breit-Wigner function, the mass and width for the resonance are found to be $M=(4209.1\pm 6.8\pm 7.0)\mathrm{MeV}$ and $\mathrm{\Gamma }=(76.6\pm 14.2\pm 2.4)\mathrm{MeV}$, where the first uncertainties are statistical and the second systematic. The parameters of the structure are consistent with those of the $Y(4220)$ found in $e^{+}{e}^{-}\to \omega {\chi }_{c0}$, ${\pi }^{+}{\pi }^{-}{h}_c$, ${\pi }^{+}{\pi }^{-}J/\psi$, and ${\pi }^{+}{D}^0{D}^{*-}$.

• Received 31 May 2017

DOI:https://doi.org/10.1103/PhysRevD.96.054008