$K^-pp$ system with chiral SU(3) effective interaction

Details $K^-pp$ system with chiral SU(3) effective interaction $K^-pp$ system with chiral SU(3) effective interaction

2008-02-02

arxiv.org/abs/0802.0238v1

Nucl.Phys.A804:197-206,2008

Physics

Nuclear Physics

Nuclear Theory

11 pages, submitted to Nuclear Physics A

Scientific paper

10.1016/j.nuclphysa.2008.02.001

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

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