The production rate of charged $D^{\mathrm{*}}$ mesons in jets has been measured in 1.8-TeV p¯p collisions at the Fermilab Tevatron with the Collider Detector at Fermilab. In a sample of approximately 32 300 jets with a mean transverse energy of 47 GeV obtained from an exposure of 21.1 ${\mathrm{nb}}^{\mathrm{-}1}$, a signal corresponding to 25.0±7.5(stat)±2.0(syst) $D^{\mathrm{*}\pm }$→$K^{\mp }$${\pi }^{\pm }$${\pi }^{\pm }$ events is seen above background. This corresponds to a ratio N($D^{\mathrm{*}+}$+$D^{\mathrm{*}\mathrm{-}}$)/N(jet) =0.10±0.03±0.03 for $D^{\mathrm{*}}$ mesons with fractional momentum z greater than 0.1.

• Received 10 October 1989

DOI:https://doi.org/10.1103/PhysRevLett.64.348