| Popis: |
Differential cross sections were measured for the reaction, ${\ensuremath{\pi}}^{+}d\ensuremath{\rightarrow}\mathrm{pp}$, at seven energies, 80, 100, 140, 182, 230, 323, and 417 MeV. Sufficient data were taken for a 1% statistical uncertainty at eleven different angles for most of these energies. The elastic ${\ensuremath{\pi}}^{+}p$ reaction was used to normalize the ${\ensuremath{\pi}}^{+}d\ensuremath{\rightarrow}\mathrm{pp}$ data. Legendre polynomial fits of the data are presented. The increased accuracy and energy of these data require an addition of a ${{cos}^{6}\ensuremath{\theta}}^{*}$ term in the traditional low energy form of the differential cross section: $C(A+{{cos}^{2}\ensuremath{\theta}}^{*}+B{cos}^{4}{\ensuremath{\theta}}^{*})$. The coefficients, $A$ and $B$, are used to compare the present data with a survey of previous experiments and the theoretical work of Niskanen. Agreement is usually within uncertainties, but some diagreement remains even among recent experiments.NUCLEAR REACTIONS $d(\ensuremath{\pi},pp)$, $E=80\ensuremath{-}417$ MeV; measured $\ensuremath{\sigma}(\ensuremath{\theta})$; calculated Legendre polynomial fits; compared to earlier work. |
