Resonance parameters from K-matrix and T-matrix poles

Abstract

We extract K-matrix poles from our fits to elastic pion-nucleon scattering and eta-nucleon production data in order to test a recently proposed method for the determination of resonance properties, based on the trace of the K-matrix. We have considered issues associated with the separation of background and resonance contributions, the correspondence between K-matrix and T-matrix poles, and the complicated behavior of eigenphases.

11 pages, 1 figure

References in corpus (3)

• Extended Partial-Wave Analysis of piN Scattering Data
• Model-independent resonance parameter extraction using the trace of K and T matrices
• Resonance signals in pion-nucleon scattering from speed plots and time delay

Cited by in corpus (14)

• Baryon spectroscopy
• Progress Toward Understanding Baryon Resonances
• Coupled-channel dynamics in the reactions piN --> piN, etaN, KLambda, KSigma
• Analytic properties of the scattering amplitude and resonances parameters in a meson exchange model
• Parameterization dependence of T matrix poles and eigenphases from a fit to piN elastic scattering data
• Systematics of radial and angular-momentum Regge trajectories of light non-strange q\bar{q}-states
• The reaction pi+ p --> K+ Sigma+ in a unitary coupled-channels model
• The role of the background in the extraction of resonance contributions from meson-baryon scattering
• P-wave excited baryons from pion- and photo-induced hyperon production
• Padé Approximants and Resonance Poles
• Singularity structure of the pi N scattering amplitude in a meson-exchange model up to energies W < 2.0 GeV
• The reaction $\pi N\to \omega N$ in a dynamical coupled-channel approach
• Toward a unified description of hadro- and photoproduction: S-wave pi- and eta-photoproduction amplitudes
• Gamma N Delta Form Factors and Wigner Rotations