Short-range repulsion and isospin dependence in the KN system

Details Short-range repulsion and isospin dependence in the KN system Short-range repulsion and isospin dependence in the KN system

2002-09-09

arxiv.org/abs/nucl-th/0209026v1

Phys.Rev. C66 (2002) 055214

Physics

Nuclear Physics

Nuclear Theory

26 pages, 5 figures

Scientific paper

10.1103/PhysRevC.66.055214

The short-range properties of the KN interaction are studied within the meson-exchange model of the Juelich group. Specifically, dynamical explanations for the phenomenological short-range repulsion, required in this model for achieving agreement with the empirical KN data, are explored. Evidence is found that contributions from the exchange of a heavy scalar-isovector meson (a_0(980)) as well as from genuine quark-gluon exchange processes are needed. Taking both mechanisms into account a satisfactory description of the KN phase shifts can be obtained without resorting to phenomenological pieces.

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