Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2001-01-03
Nucl.Phys. A691 (2001) 268-277
Physics
Nuclear Physics
Nuclear Theory
11 pages including 8 figures, to be published in NPA (Proc. HYP2000)
Scientific paper
10.1016/S0375-9474(01)01043-0
Recent optical-potential studies of the phenomenology of kaonic atoms are reviewed. It is shown that the data can be fitted by a complex optical potential with either a relatively shallow attractive component (about -50 MeV at nuclear-matter density), as suggested by a self consistent application of chirally motivated coupled-channels models, or a relatively deep attractive component (about -180 MeV at nuclear-matter density) as suggested by a mean-field extrapolation of a phenomenological low-density expansion. Both classes of these optical potentials, due to their strongly absorptive component, predict similarly structured relatively narrow `deeply bound' kaonic-atom states with widths saturating at about 2 MeV. Possible formation reactions are briefly discussed. The more speculative case for relatively narrow deeply bound kaonic nuclear states is briefly mentioned. Recent works on other strange hadronic atom systems, for the negatively charged Sigma and Cascade hyperons, are also discussed.
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