English

$N^*$ resonances from $K\Lambda$ amplitudes in sliced bins in energy

Nuclear Experiment 2018-01-17 v1

Abstract

The two reactions γpK+Λ\gamma p\to K^+\Lambda and πpK0Λ\pi^-p\to K^0\Lambda are analyzed to determine the leading photoproduction multipoles and the pion-induced partial wave amplitudes in slices of the invariant mass. The multipoles and the partial-wave amplitudes are simultaneously fitted in a multichannel Laurent+Pietarinen model (L+P model), which determines the poles in the complex energy plane on the second Riemann sheet close to the physical axes. The results from the L+P fit are compared with the results of an energy-dependent fit based on the Bonn-Gatchina (BnGa) approach. The study confirms the existence of several poles due to nucleon resonances in the region at about 1.9\,GeV with quantum numbers JP=1/2+J^P = 1/2^+, 3/2+,1/2,3/2,5/23/2^+, 1/2^-, 3/2^-, 5/2^-.

Keywords

Cite

@article{arxiv.1712.07537,
  title  = {$N^*$ resonances from $K\Lambda$ amplitudes in sliced bins in energy},
  author = {A. V. Anisovich and V. Burkert and M. Hadžimehmedović and D. G. Ireland and E. Klempt and V. A. Nikonov and R. Omerović and A. V. Sarantsev and J. Stahov and A. Švarc and U. Thoma},
  journal= {arXiv preprint arXiv:1712.07537},
  year   = {2018}
}

Comments

18 pages, 12 figures

R2 v1 2026-06-22T23:24:44.903Z