Measurements of Charm Fragmentation into $D_s^{\ast +}$ and $D_s^{+}$ in $e^{+}{e}^{-}$ Annihilations at $\sqrt{s}$=10.5 GeV

Abstract

A study of charm fragmentation into $D_s^{\ast +}$ and $D_s^{+}$ in $e^{+}{e}^{-}$ annihilations at $\sqrt{s}$=10.5 GeV is presented. This study using $4.72\pm 0.05$ fb${}^{-1}$ of CLEO II data reports measurements of the cross-sections $\sigma (D_s^{\ast +})$ and $\sigma (D_s^{+})$ in momentum regions above $x=0.44$, where $x$ is the $D_s$ momentum divided by the maximum kinematically allowed $D_s$ momentum. The $D_s$ vector to vector plus pseudoscalar production ratio is measured to be $P_V(x(D_s^{+})>0.44)=0.44\pm 0.04$

21 pages, 6 figures