Evidence for a narrow state decaying into an $F$ meson and a photon has been obtained in $e^{+}{e}^{-}$ annihilation events at 29-GeV c.m. energy. This state lies 139.5 ± 8.3(stat.) ± 9.7(syst.) MeV above the $F$-meson mass and is consistent with the expected $F^{*}$ meson. The $F$ mesons are identified by a peak in the $K^{+}{K}^{-}K{\pi }^{\pm }$ mass at 1.948±0.028±0.010 GeV.

• Received 13 September 1984

DOI:https://doi.org/10.1103/PhysRevLett.53.2465