Abstract
Measurements of cross sections for pion-induced double-charge-exchange reactions to the double-isobaric-analog state for $^{42,44,48}\mathrm{Ca}$ at incident pion energies of 300--550 MeV at ${\mathrm{\ensuremath{\theta}}}_{\mathrm{lab}}$=5\ifmmode^\circ\else\textdegree\fi{} are reported, together with upper limits for cross sections for transitions to the residual ground states for $^{44,48}\mathrm{Ca}$. The data are fitted with a two-amplitude model which gives expressions for cross sections for both transitions. The fit overpredicts the ground-state cross sections, indicating a failure of the model in this energy range.
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