It has recently been proven from measurements of the spin-transfer coefficients $D_{ xx}$ and $D_{ zz}$ that there is a small but non-vanishing $\Delta S=0$ component $\sigma_{ 0}$, in the inclusive $p(p,n)N\pi\,$ reaction cross section $\sigma\,$. It is shown that the dominant part of the measured $\sigma_{ 0}$ can be explained in terms of the projectile $\Delta$ excitation mechanism. An estimate is further made of contributions to $\sigma_{ 0}$ from s-wave rescattering process. It is found that s-wave rescattering contribution is much smaller than the contribution coming from projectile $\Delta$ excitation mechanism. The addition of s-wave rescattering contribution to the dominant part, however, improves the fit to the data.
Categories: nucl-th