Double-Regge-Pole Model Analysis ofpp→pnπ+at 28.5 GeV/c; Pion Exchange and the 1400-MeVπNEnhancement

Abstract

Experimental distributions in all kinematic variables for the reaction $\mathrm{pp}\to \mathrm{pn}{\pi }^{+}$ at 28.5 GeV/c are consistent with predictions of a double-Regge-pole model employing Pomeranchuk and pion exchanges with the pion required to couple in conspiracy fashion to $\mathrm{np}$. The 1400-MeV $\pi N$ enhancement seen in these data is well fitted.