Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2012-01-16
Physics
Nuclear Physics
Nuclear Theory
14 pages, 4 figures, 2 tables; significantly extented article, which includes the first version as a part; the title was chang
Scientific paper
We calculated the $1s$ level shifts and widths of the kaonic deuterium, corresponding to accurate results on near-threshold antikaon - deuteron scattering. The Lippmann-Schwinger eigenvalue equation with a strong $K^- - d$ and Coulomb potentials was solved. The two-body $K^- - d$ potentials reproduce the near-threshold elastic amplitudes of $K^- d$ scattering obtained from the three-body Alt-Grassberger-Sandhas equations with the coupled channels using four versions of the $\bar{K}N - \pi \Sigma$ potentials. Both new $\bar{K}N - \pi \Sigma$ potentials reproducing the very recent SIDDHARTA data on the kaonic hydrogen and our older potentials reproducing KEK data have one- or two-pole versions of the $\Lambda(1405)$ resonance and reproduce all experimental data on $K^- p$ scattering.
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