Eur. Phys. J. A (2011) 47: 18
https://doi.org/10.1140/epja/i2011-11018-3

Regular Article - Theoretical Physics

DN interaction from meson exchange

¹ Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425, Jülich, Germany
² Institute for Advanced Simulation, Forschungszentrum Jülich, D-52425, Jülich, Germany
³ Instituto de Fısica Teórica, Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271 - 01140-070, São Paulo, SP, Brazil
⁴ Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics, Universität Bonn, Nußallee 14-16, D-53115, Bonn, Germany
⁵ Theory Group, KVI, Zernikelaan 25, NL-9747AA, Groningen, The Netherlands
⁶ Instituto de Ciencias del Espacio (IEEC/CSIC), Campus Universitat Autonoma de Barcelona, Facultat de Ciencies, Torre C5, E-08193, Bellaterra (Barcelona), Spain

^* e-mail: j.haidenbauer@fz-juelich.de

Received: 23 August 2010
Accepted: 14 December 2010
Published online: 3 February 2011

Abstract

A model of the DN interaction is presented which is developed in close analogy to the meson-exchange N potential of the Jülich group utilizing SU(4) symmetry constraints. The main ingredients of the interaction are provided by vector meson ( , exchange and higher-order box diagrams involving D ^* N , D , and D ^* intermediate states. The coupling of DN to the and channels is taken into account. The interaction model generates the (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 (2595) -resonance are discussed and the role of the near-by threshold is emphasized. Selected predictions of the orginal N model are reported too. Specifically, it is pointed out that the model generates two poles in the partial wave corresponding to the (1405) -resonance.