DN interaction from meson exchange

Haidenbauer, J.; Meißner, U.-G.; Tolos, L.; Krein, G.

doi:10.1140/epja/i2011-11018-3

Journal Article

PreJuSER-18453

DN interaction from meson exchange

Haidenbauer, J.FZJ* ; Krein, G. ; Meißner, U.-G.FZJ* ; Tolos, L.

2011
Springer Berlin

The European physical journal / A 47, 18 (2011) [10.1140/epja/i2011-11018-3]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10304 doi:10.1140/epja/i2011-11018-3

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

Keyword(s): interaction: model ; symmetry: SU(4) ; meson: exchange ; Feynman graph: higher-order ; differential cross section ; Lambda(1405) ; vector meson ; partial wave ; pole ; interaction: (D nucleon) ; Lambda/c(2593) ; coupled channel ; anti-K nucleon: interaction ; mass spectrum ; phase shift ; numerical calculations: interpretation of experiments

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Note: J.H. acknowledges instructive discussions with M. Doring about the determination of poles in the complex plane. This work is partially supported by the Helmholtz Association through funds provided to the virtual institute "Spin and strong QCD" (VH-VI-231), by the EU Integrated Infrastructure Initiative HadronPhysics2 Project (WP4 QCDnet), by BMBF (06BN9006) and by DFG (SFB/TR 16, "Subnuclear Structure of Matter"). G.K. acknowledges financial support from CAPES, CNPq and FAPESP (Brazilian agencies). L.T. wishes to acknowledge support from the Rosalind Franklin Programme of the University of Groningen (The Netherlands) and the Helmholtz International Center for FAIR within the framework of the LOEWE program by the State of Hesse (Germany).; 14 pages, 8 figures; 14 pages, 8 figures

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