K-pp system with chiral SU(3) effective interaction
Abstract
The K-pp system is investigated using a variational approach with realistic two-body interactions: the Argonne v18 NN potential and an energy dependent KN effective interaction derived from chiral SU(3) coupled-channel dynamics. Uncertainties in subthreshold extrapolations of the KN interaction are considered. A weakly bound K-pp state is found, with a binding energy B = (19 3) MeV substantially smaller than suggested in previous calculations. The decay width (K-pp π N) is estimated to range between about 40 and 70 MeV.
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