Projectile $Δ$ Excitations in $p(p,n)Nπ$ Reactions

Abstract

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 $ΔS=0$ component $σ_{0}$, in the inclusive $p(p,n)Nπ\,$ reaction cross section $σ\,$. It is shown that the dominant part of the measured $σ_{0}$ can be explained in terms of the projectile $Δ$ excitation mechanism. An estimate is further made of contributions to $σ_{0}$ from s-wave rescattering process. It is found that s-wave rescattering contribution is much smaller than the contribution coming from projectile $Δ$ excitation mechanism. The addition of s-wave rescattering contribution to the dominant part, however, improves the fit to the data.