Abstract

Based on a two-nucleon model, we have studied the core polarization effects in near-threshold pion-production reactions $^{12,14}\mathrm{C}$(p\ensuremath{\rightarrow},${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$) $^{13,15}\mathrm{O}_{\mathrm{g}.\mathrm{s}.}$. The core polarization reduces the absolute value of the pion-production cross section over all angular directions, while the analyzing power distributions are quite insensitive to it.

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