Chiral SU(3) Dynamics and Antikaon-Nuclear quasibound States

Details Chiral SU(3) Dynamics and Antikaon-Nuclear quasibound States Chiral SU(3) Dynamics and Antikaon-Nuclear quasibound States

2008-01-09

arxiv.org/abs/0801.1467v1

Nucl.Phys.A804:173-185,2008

Physics

Nuclear Physics

Nuclear Theory

Scientific paper

10.1016/j.nuclphysa.2008.01.003

Recent developments are summarised concerning low-energy KbarN interactions as they relate to the possible existence of antikaon-nuclear quasibound states. An exploratory study of antikaons bound to finite nuclei is performed, with emphasis on the evolution of such states from light to heavy nuclei (A = 16 - 208). The energy dependent, driving attractive KbarN interactions are constructed using the s-wave coupled-channel amplitudes involving the Lambda(1405) and resulting from chiral SU(3) dynamics, plus p-wave amplitudes dominated by the Sigma(1385). Effects of Pauli and short-range correlations are discussed. The decay width induced by K^-NN two-body absorption is estimated and found to be substantial. It is concluded that Kbar-nuclear quasibound states can possibly exist with binding energies ranging from 60 to 100 MeV, but with short life times corresponding to decay widths of the similar magnitudes.

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