[SEMINARI]: Dr. Kaiser: Peripheral NN-Scattering and Chiral Symmetry

[Arcadi Santamaria]

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                              S E M I N A R I

            [Image]    Departament de Física Teòrica     [Image]
                          Universitat de València
                      46100 Burjassot (València) Spain

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                   Peripheral NN-Scattering and Chiral Symmetry

                                  N. Kaiser

                     (Physik Department T39 TU Muenchen)

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                     Aula de Seminaris de Física Teòrica
                   Monday 15 of March of 1999 at 12:00 AM
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                                    Resum

 We evaluate in the one-loop approximation of chiral perturbation theory all
 one- and two-pion exchange contributions to elastic NN-scattering. We find
    that the Delta(1232)-excitation produces the correct amount of scalar
 isoscalar attraction as needed in the peripheral partial waves with $L>=3$.
 Thus no explicit sigma meson is needed. The two-loop diagrams of correlated
    two-pion produce negligilby small repulsive corrections. Vector meson
          exchamge becomes important in the F-waves above 150 MeV.

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