Microscopic $NN\to NN^{\ast}(1440)$ transition potential: Determination of $πNN^{\ast}(1440)$ and $σNN^{\ast}(1440)$ coupling constants

A $NN\to NN^{\ast}(1440)$ transition potential, based on an effective quark-quark interaction and a constituent quark cluster model for baryons, is derived in the Born-Oppenheimer approach. The potential shows significant differences with respect to those obtained by a direct scaling of the nucleon-nucleon interaction. From its asymptotic behavior we extract the values of $πNN^{\ast}(1440)$ and $σNN^{\ast}(1440)$ coupling constants in a particular coupling scheme

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