期刊
NUCLEAR PHYSICS A
卷 804, 期 -, 页码 197-206出版社
ELSEVIER
DOI: 10.1016/j.nuclphysa.2008.02.001
关键词
K-nuclear system; variational calculation; chiral SU(3) coupled-channel dynamics
The K- pp system is investigated using a variational approach with realistic two-body interactions: the Argonne v18 NN potential and an energy dependent (K) over barN effective interaction derived from chiral SU(3) coupled-channel dynamics. Uncertainties in subthreshold extrapolations of the (K) over barN 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 Gamma(K(-)pp -> pi Sigma N) is estimated to range between about 40 and 70 MeV. (c) 2008 Elsevier B.V. All rights reserved.
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