$σ$ Exchange in the NN Interaction within the Chiral Unitary Approach

Details $σ$ Exchange in the NN Interaction within the Chiral Unitary Approach $σ$ Exchange in the NN Interaction within the Chiral Unitary Approach

2000-11-02

arxiv.org/abs/nucl-th/0011008v1

Prog.Theor.Phys. 103 (2000) 351-365

Physics

Nuclear Physics

Nuclear Theory

LaTeX, 22pages 10figures

Scientific paper

10.1143/PTP.103.351

We study the nucleon-nucleon interaction in the isoscalar-scalar channel using t he chiral unitary approach. The $t$-matrix of the pion-pion scattering in this c hannel is summed up to all orders using the B-S equation. We find that the calcu lated results at long distances are close to those of the $\sigma$-exchange inte raction. In addition, there appears a shorter range repulsion in this channel.

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