$\Delta$-mass dependence of the M-matrix in the calculation of $\mbox{N}\Delta\to \mbox{NN}$ cross sections

Abstract

Within the one boson exchange model, $\Delta$-mass dependent M-matrix and its influence on the calculation of $N\Delta \to NN$ cross sections are investigated. Our calculations show that the $m_{\Delta}$ dependence of $|\textbf{p}_{N\Delta}|$ and $|\mathcal{M}|^2$ has effects on the calculations of $\sigma_{N\Delta\to NN}$, especially around the threshold energy. We finally provide a table of accurate $\sigma_{N\Delta\to NN}$ which can be used in the transport models.