Para acceder a los documentos con el texto completo, por favor, siga el siguiente enlace: http://hdl.handle.net/2445/12810
dc.contributor | Universitat de Barcelona |
---|---|
dc.contributor.author | Ramos Gómez, Àngels |
dc.contributor.author | Oset Baguena, Eulogio |
dc.contributor.author | Bennhold, Cornelius |
dc.date | 2010-06-09T12:45:58Z |
dc.date | 2010-06-09T12:45:58Z |
dc.date | 2002 |
dc.identifier.citation | 0031-9007 |
dc.identifier.citation | 505051 |
dc.identifier.uri | http://hdl.handle.net/2445/12810 |
dc.description.abstract | Using a unitary extension of chiral perturbation theory with a lowest-order s -wave SU(3) chiral Lagrangian we study low-energy meson-baryon scattering in the strangeness S = − 2 sector. A scattering-matrix pole is found around 1605 MeV which corresponds to an s -wave Ξ resonance with J P = 1 / 2 − . We identify this resonance with the Ξ ( 1620 ) state, quoted by the Particle Data Group with I = 1 / 2 but with unknown spin and parity. The addition of the S = − 2 state to the recently computed Λ ( 1670 ) , Σ ( 1620 ) , and N ( 1535 ) states completes the octet of J P = 1 / 2 − resonances dynamically generated in this chiral unitary approach. |
dc.format | 4 p. |
dc.format | application/pdf |
dc.language.iso | eng |
dc.publisher | American Physical Society |
dc.relation | Reproducció digital del document proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevLett.89.252001 |
dc.relation | Physical Review Letters, 2002, vol. 89, núm. 25, p. 252001-1-252001-4 |
dc.relation | http://dx.doi.org/10.1103/PhysRevLett.89.252001 |
dc.rights | (c) American Physical Society, 2002 |
dc.rights | info:eu-repo/semantics/openAccess |
dc.subject | Partícules (Matèria) |
dc.subject | Spin (Física nuclear) |
dc.subject | Particles |
dc.subject | Nuclear spin |
dc.title | Spin, parity and nature of the Xi(1620) resonance |
dc.type | info:eu-repo/semantics/article |
dc.type | info:eu-repo/semantics/publishedVersion |