The Juelich hyperon-nucleon model revisited

Details The Juelich hyperon-nucleon model revisited The Juelich hyperon-nucleon model revisited

2005-06-07

arxiv.org/abs/nucl-th/0506019v2

Phys.Rev. C72 (2005) 044005

Physics

Nuclear Physics

Nuclear Theory

24 pages, 13 figures, some modifications to text, several references added, some figures corrected, to appear in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.72.044005

A one-boson-exchange model for the hyperon-nucleon (\Lambda N, \Sigma N) interaction is presented. The model incorporates the standard one boson exchanges of the lowest pseudoscalar and vector meson multiplets with coupling constants fixed by SU(6) flavor symmetry relations. As the main new feature of the model, the contributions in the scalar--isoscalar (\sigma) and vector--isovector (\rho) exchange channels are now constrained by a microscopic model of correlated \pi\pi and K \bar K exchange. Additional short-ranged ingredients of the model in the scalar--isovector (a_0) and scalar--isospin-1/2 (\kappa) channels are likewise viewed as arising from meson-meson correlations but are treated phenomenologically. With this model a satisfactory reproduction of the available hyperon-nucleon data can be achieved.

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