Structure of Lambda(1405) and chiral dynamics

Abstract

We report on a recent theoretical work on the structure of the Lambda(1405) resonance within a chiral unitary approach, in which the resonance is dynamically generated in meson-baryon scattering. Studying the analytic structure of the scattering amplitude, we have found that there are two poles lying around energies of Lambda(1405) with different widths and couplings to the meson-baryon states. We discuss reactions to conform the double pole structure in experiment and elastic K^- p scattering at low energies.

4 pages, LaTeX, 2 eps figures. Talk given at 10th International Conference on the Structure of Baryons (Baryon 2004) at Palaiseau (France), 25-29 October 2004

References in corpus (14)

• Chiral dynamics in the presence of bound states: kaon-nucleon interactions revisited
• Non perturbative chiral approach to s-wave \bar{K}N interactions
• Chiral Dynamics of the Two Λ(1405) States
• Relativistic chiral SU(3) symmetry, large N_c sum rules and meson-baryon scattering
• SU(3) Chiral Dynamics with Coupled Channels: Eta and Kaon Photoproduction
• Low lying S=-1 excited baryons and chiral symmetry
• $S=-1$ Meson-Baryon Unitarized Coupled Channel Chiral Perturbation Theory and the $S_{01}-$ $\Lambda$(1405) and $-\Lambda$(1670) Resonances
• Spectrum and decays of kaonic hydrogen
• Magnetic moments of the Lambda(1405) and Lambda(1670) resonances
• $\Lambda (1405)$ production in the ${\pi }^{-}p\to K^0\pi \Sigma$ reaction
• Chiral dynamics of p-wave in K^- p and coupled states
• Radiative production of the Lambda(1405) resonance in K collisions on protons and nuclei
• The S-wave Λπphase shift is not large
• Photoproduction of $K^{\ast }$ for the study of $\Lambda (1405)$

Cited by in corpus (6)

• Photoproduction of Lambda(1405) and Sigma^{0}(1385) on the proton at E_γ= 1.5-2.4 GeV
• Helicity amplitudes and electromagnetic decays of hyperon resonances
• Strong absorption of hadrons with hidden and open strangeness in nuclear matter
• Meson-baryon threshold effects in the light-quark baryon spectrum
• Lambda(1405) as a Resonance in the Baryon-Meson Scattering Coupled to the q^3 State in a Quark Model
• Lambda(1405) in a baryon-meson scattering with a bound state embedded in the continuum