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Microscopic NNto NN^(ast)(1440) transition potential: Determination of π NN^(ast)(1440) and σ NN^(ast)(1440) coupling constants

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arxiv nucl-th/0208033 v1 pith:62JJWBA3 submitted 2002-08-19 nucl-th

Microscopic NNto NN^(ast)(1440) transition potential: Determination of π NN^(ast)(1440) and σ NN^(ast)(1440) coupling constants

classification nucl-th
keywords couplingpotentialconstantsinteractionsigmatransitionapproachasymptotic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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 $\pi NN^{\ast}(1440)$ and $\sigma NN^{\ast}(1440)$ coupling constants in a particular coupling scheme

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