Max-Planck-Institut für Physik und Astrophysik, München, Germany
Abstract:
We have performed an energy-independent phase-shift analysis of πN → KΣ by analyzing differential cross-section and polarization data for the reactions π+p → K+∑+ and at fifteen energies from threshold to 2137 MeV invariant mass. The single-energy solutions were linked by shortest-path methods with and without constraints implied by the Odorico zeros for the reaction π?p → K+Σ?. Similar to π?p → KΛ it has been found that both isostates are dominated below 1900 MeV by resonances in the spin waves. The F37 resonance couples to KΣ with √xπNxKΣ= 0.04.