The p(d,d^(prime)) Reaction and the σ NN^(ast)(1440) Coupling Constant

We make use of a $NN \to NN^*(1440)$ transition potential derived from a quark-model in a parameter-free way, to study the Roper excitation diagram contributing to the reaction $p(d,d^{\prime})$. We also determine the $\pi NN^*(1440)$ and $\sigma NN^*(1440)$ coupling constants.