The nature of Lambda(1405) hyperon resonance in chiral dynamics

Abstract

The nature of the Lambda(1405) is discussed based on the unitarised coupled-channels approach with chiral dynamics (chiral unitary model). This approach describes the Kbar N scattering cross sections and the Lambda(1405) spectra phenomenologically very well. With this successful description of Lambda(1405), it is found that the Lambda(1405) is composed by two resonance states having different coupling nature to the meson-baryon states. As a consequence, the resonance position in the pi Sigma invariant mass spectrum depends on the initial channel of the Lambda(1405) production. To observe the Lambda(1405) initiated by the Kbar N channel, K^- d to Lambda(1405) n is one of the most favorable reactions. Hadronic molecule states with kaons are also discussed by emphasizing an important role of Lambda(1405) as a quasibound state of Kbar N.

8 pages, three figures. Talk given at 10th International Conference on Hypernuclear and Strange Particle Physics (HYP-X), Tokai, Ibaraki, Japan, 14-18 Sep 2009.

References in corpus (25)

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• Non perturbative chiral approach to s-wave \bar{K}N interactions
• Chiral Dynamics of the Two Λ(1405) States
• Chiral Dynamics and the Low Energy Kaon-Nucleon Interaction
• Low lying S=-1 excited baryons and chiral symmetry
• Effective Kbar N interaction based on chiral SU(3) dynamics
• Faddeev calculation of a $K^{-}pp$ quasi-bound state
• K^- p scattering length from scattering experiments
• Strange dibaryon resonance in the anti-KNN--piYN system
• Variational calculation of the ppK^- system based on chiral SU(3) dynamics
• The basic K nuclear cluster K- pp and its enhanced formation in the p + p -> K+ + X reaction
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• Origin of resonances in the chiral unitary approach
• Flavor SU(3) breaking effects in the chiral unitary model for meson-baryon scatterings
• Chiral dynamics of kaon-nucleon interactions, revisited
• Resonance energy of the barKNN-piYN system
• Three body resonances in two meson-one baryon systems
• Kaonic production of Lambda(1405) off deuteron target in chiral dynamics
• K anti-K N molecule state with I=1/2 and J^P=1/2^+ studied with three-body calculation
• anti-K anti-K N molecule state in three-body calculation
• Chiral dynamics of p-wave in K^- p and coupled states
• Electromagnetic mean squared radii of Lambda(1405) in chiral dynamics
• On the nature of the $\Lambda (1405)$ and $\Lambda (1670)$ from their $N_c$ behavior in chiral dynamics
• Structure of the Lambda(1405) baryon resonance from its large Nc behavior
• Lambda(1405)-induced non-mesonic decay in kaonic nuclei

Cited by in corpus (13)

• The nature of the Lambda(1405) resonance in chiral dynamics
• $\bar{D}{\Sigma }_c^{\ast }$ and ${\bar{D}}^{\ast }{\Sigma }_c$ interactions and the LHCb hidden-charmed pentaquarks
• Lattice QCD Evidence that the Lambda(1405) Resonance is an Antikaon-Nucleon Molecule
• DN interaction from meson exchange
• Rare dileptonic decays of Λ_b in a quark model
• Vector meson-Baryon dynamics and generation of resonances
• Nucleon resonances $N(1875)$ and $N(2100)$ as strange partners of LHCb pentaquarks
• $K\Lambda (1405)$ configuration of the $K\bar{K}N$ system
• The internal structures of the nucleon resonances $N(1875)$ and $N(2120)$
• $P_c$-like pentaquarks in hidden strange sector
• Lepton polarization asymmetries for FCNC decays of the ${\Lambda }_b$ baryon
• QCD sum rule study for hidden-strange pentaquarks
• Vector- and Pseudoscalar-baryon coupled channel systems