Estimate ofπ−p→π0nAmplitudes in Terms of Direct-Channel Resonances and Dual-Absorptive Requirements

The real parts of the $s$-channel helicity amplitudes, the differential cross section, and the polarization for ${\pi }^{-}p\to {\pi }^{0}n$ are estimated at $t=-0.175\mathrm{} \mathrm{and} -0.5\mathrm{}$ Ge${\mathrm{V}}^2$ by means of dispersion relations, $s$-channel resonances, and dual absorptive requirements. The results are in satisfactory agreement with experiment and with recent amplitude analyses.