arXiv:nucl-th/0208033v1 19 Aug 2002 Microscopic NN → NN ∗ (1440) transition potential: Determination of πNN ∗ (1440) and σNN ∗ (1440) coupling constants. B.Juli´a-D´ ıaz 1 , A. Valcarce 1,2 ,P.Gonz´alez 2 , and F. Fern´andez 1 1 Grupo de F´ ısica Nuclear Universidad de Salamanca, E-37008 Salamanca, Spain 2 Dpto. de F´ ısica Te´ orica and IFIC Universidad de Valencia - CSIC, E-46100 Burjassot, Valencia, Spain Abstract A NN → NN ∗ (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 in- teraction. From its asymptotic behavior we extract the values of πNN ∗ (1440) and σNN ∗ (1440) coupling constants in a particular coupling scheme. Keywords: nonrelativistic quark models, baryon-baryon potentials Pacs: 12.39.Jh, 13.75.Cs, 14.20.Gk, 24.85.+p 1