DN interaction from meson exchange |
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| Authors: | J Haidenbauer G Krein U -G Meißner L Tolos |
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| Institution: | 1.Institut für Kernphysik and Jülich Center for Hadron Physics,Forschungszentrum Jülich,Jülich,Germany;2.Institute for Advanced Simulation,Forschungszentrum Jülich,Jülich,Germany;3.Instituto de F?sica Teórica,Universidade Estadual Paulista,S?o Paulo,Brazil;4.Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics,Universit?t Bonn,Bonn,Germany;5.Theory Group, KVI,Groningen,The Netherlands;6.Instituto de Ciencias del Espacio (IEEC/CSIC),Campus Universitat Autonoma de Barcelona, Facultat de Ciencies,Bellaterra (Barcelona),Spain |
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| Abstract: | A model of the DN interaction is presented which is developed in close analogy to the meson-exchange `(K)] \bar{{K}}
N potential of the Jülich group utilizing SU(4) symmetry constraints. The main ingredients of the interaction are provided by vector meson (r \rho , w \omega exchange and higher-order box diagrams involving D
*
N , D
D \Delta , and D
*
D \Delta intermediate states. The coupling of DN to the p \pi
Lc \Lambda_{c}^{} and p \pi
Sc \Sigma_{c}^{} channels is taken into account. The interaction model generates the Lc \Lambda_{c}^{}(2595) -resonance dynamically as a DN quasi-bound state. Results for DN total and differential cross sections are presented and compared with predictions of two interaction models that are based
on the leading-order Weinberg-Tomozawa term. Some features of the Lc \Lambda_{c}^{}(2595) -resonance are discussed and the role of the near-by p \pi
Sc \Sigma_{c}^{} threshold is emphasized. Selected predictions of the orginal `(K)] \bar{{K}}
N model are reported too. Specifically, it is pointed out that the model generates two poles in the partial wave corresponding
to the L \Lambda(1405) -resonance. |
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