D-meson production in e+e− annihilation at Ec.m. between 3.8 and 6.7 GeV

Abstract

The Mark II detector at SPEAR has been used to study $D$-meson production in $e^{+}{e}^{-}$ annihilation at center-of-mass energies between 3.8 and 6.7 GeV. The neutral and charged $D$ mesons are identified from their $K^{\mp }{\pi }^{\pm }$ and $K^{\mp }{\pi }^{\pm }{\pi }^{\pm }$ decay modes. Measurements of $R_D$ and of the inclusive differential cross section $s$ $\frac{d\sigma }{\mathrm{dz}}$ are presented. The quasi-two-body cross sections ${\sigma }_{D\overline{D}}$, ${\sigma }_{D^{*}\overline{D}}$, and ${\sigma }_{D^{*}{\overline{D}}^{*}}$ are derived from an overall fit to the $D$ recoil spectra. No evidence was found for the associated production of charmed mesons and charmed baryons.