6533b82afe1ef96bd128c1d4
RESEARCH PRODUCT
Antikaon-nucleon interaction and Lambda(1405) in chiral SU(3) dynamics
Kenta MiyaharaEulogio OsetShota OhnishiYuki KamiyaWolfram WeiseTetsuo HyodoYoichi Ikedasubject
PhysicsNuclear and High Energy PhysicsParticle physicsNuclear Theory010308 nuclear & particles physicsHadronNuclear TheoryFOS: Physical sciencesMolecular configurationStrangeness16. Peace & justice01 natural sciencesResonance (particle physics)Spectral lineBaryonNuclear Theory (nucl-th)High Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciences010306 general physicsNucleonWave functionNuclear Experimentdescription
The properties of the Lambda(1405) resonance are key ingredients for determining the antikaon-nucleon interaction in strangeness nuclear physics, and the novel internal structure of the Lambda(1405) is of great interest in hadron physics, as a prototype case of a baryon that does not fit into the simple three-quark picture. We show that a quantitative description of the antikaon-nucleon interaction with the Lambda(1405) is achieved in the framework of chiral SU(3) dynamics, with the help of recent experimental progress. Further constraints on the Kbar N subthreshold interaction are provided by analyzing pi Sigma spectra in various processes, such as the K-d -> pi Sigma n reaction and the Lambda_c -> pi pi Sigma decay. The structure of the Lambda(1405) is found to be dominated by an antikaon-nucleon molecular configuration, based on its wavefunction derived from a realistic Kbar N potential and the compositeness criteria from a model-independent weak-binding relation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-02-29 |