$N^{\ast }$ resonances from $K\Lambda$ amplitudes in sliced bins in energy

Abstract

The two reactions $\gamma p\to K^{+}\Lambda$ and ${\pi }^{-}p\to K^0\Lambda$ 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 $J^P=1/2^{+}$, $3/2^{+},1/2^{-},3/2^{-},5/2^{-}$.

18 pages, 12 figures

References in corpus (8)

• Extended Partial-Wave Analysis of piN Scattering Data
• Eta photoproduction in a combined analysis of pion- and photon-induced reactions
• Partial decay widths of baryons in the spin-momentum operator expansion method
• Further evidence for N(1900)P_{13} from photoproduction of hyperons
• A Bayesian analysis of kaon photoproduction with the Regge-plus-resonance model
• Pole positions and residues from pion photoproduction using the Laurent+Pietarinen expansion method
• Energy-independent PWA of the reaction $\gamma p\to K^{+}\Lambda$
• Pole structure from energy-dependent and single-energy fits to $\pi N$ elastic scattering data

Cited by in corpus (8)

• Photo- and Electrocouplings of Nucleon Resonances
• Photo- and electro-production of narrow exotic states: from light quarks to charm and up to bottom
• Nucleon resonance production in the $\gamma p\to p\eta \varphi$ reaction
• Ridge regression for minimizing the couplings of hyperon resonances in the $K^{+}\Lambda$ photoproduction
• Application of the single-channel, single-energy AA/PWA method to $K^{+}\Lambda$ photoproduction
• Laurent+Pietarinen Partial Wave Analysis
• Single-channel, single-energy partial-wave analysis with continuity improved through minimal phase constraints
• Photoproduction $\gamma p\to K^{+}\Lambda (1690)$ in an effective Lagrangian approach