Spin tests for charmed mesons produced ine+e−annihilation ats=4.028GeV

Spin tests for particles produced in $e^{+}{e}^{-}$ annihilation at $\sqrt{s}=4.028\mathrm{}$ GeV in the state labeled ${\overline{D}}^{*}{D}^{*}$ are presented. These particles are currently believed to be spin-1 particles with negative parity. However, their extraordinarily large production rate just above their production threshold—despite the $p$-wave nature of the production process—leads us to speculate that one of these might, in fact, be a spinless, positive-parity $D$ meson with a mass approximately the same as the $D^{*}$. This possibility is considered and tested in detail, along with the usual hypothesis that the particles are spin-1 particles.