This paper reports cross-section measurements for the ${\rho }^0$ and $K^{*}\mathrm{}\left(890\right)\mathrm{}$ vector mesons produced in $e^{+}{e}^{-}$ annihilation at $\sqrt{s}=29\mathrm{}$ GeV. The data, which were taken with the High Resolution Spectrometer operating at the SLAC colliding-beam facility PEP, correspond to an integrated luminosity of 291 ${\mathrm{pb}}^{-1\mathrm{}}$. The measured multiplicities for fractional momentum $x>\mathrm{}0.05\mathrm{}$ are $N_{{\rho }^0}=0.79\mathrm{}\pm 0.04$ and $N_{K^{*0\mathrm{}}\mathrm{}\left(890\right)\mathrm{}}=0.53\mathrm{}\pm 0.04$. The measured fragmentation functions agree well with the predictions of the Lund model and when extrapolated to threshold, the corresponding total multiplicities are $N_{{\rho }^0}=0.90\mathrm{}\pm 0.05$ and $N_{K^{*0\mathrm{}}\mathrm{}\left(890\right)\mathrm{}}=0.59\mathrm{}\pm 0.05$.

• Received 14 February 1989

DOI:https://doi.org/10.1103/PhysRevD.40.706