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RESEARCH PRODUCT
Low-lying resonances from chiral unitary dynamics
Eulogi OsetC. BennholdAngels Ramossubject
PhysicsNuclear and High Energy Physicssymbols.namesakeOctetScatteringQuantum mechanicsNuclear TheoryHigh Energy Physics::PhenomenologysymbolsParity (physics)Singlet stateUnitary stateLagrangiandescription
Abstract The s-wave meson-baryon interaction is studied using the lowest-order chiral lagrangian in a unitary coupled-channels Bethe-Salpeter equation. The resonances belonging to the low-lying J P = 1 2 − octet, the N (1535), Λ(1620) and Ξ(1620), together with the Λ(1405) singlet, are generated dynamically through multiple meson-baryon scattering. The Λ(1405) appears as a mixture of K N and πΣ quasibond states, while the Λ(1670) is a K Ξ quasibond state. Arguments are given to assigne J P = 1 2 − to the unmeasured spin and parity of the Ξ(1620).
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-06-01 | Nuclear Physics A |