Observation of ψ production in $e^{+}$$e^{\mathrm{-}}$ annihilation at 29 GeV

Inclusive ψ production in $e^{+}$$e^{\mathrm{-}}$ annihilation at 29 GeV has been measured with the Mark II detector. The ψ cross section is found to be 1.1±0.5±0.4 pb. After subtraction of the expected contribution from B decay, an upper limit of 0.02${\sigma }_{\mu \mu }$ is obtained for other sources of ψ production.