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http://hdl.handle.net/2445/12838
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DC Field | Value | Language |
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dc.contributor.author | Magas, Volodymyr | cat |
dc.contributor.author | Oset Baguena, Eulogio | cat |
dc.contributor.author | Ramos Gómez, Àngels | cat |
dc.date.accessioned | 2010-06-11T10:03:10Z | - |
dc.date.available | 2010-06-11T10:03:10Z | - |
dc.date.issued | 2005 | - |
dc.identifier.issn | 0031-9007 | - |
dc.identifier.uri | http://hdl.handle.net/2445/12838 | - |
dc.description.abstract | The K{sup -}p{yields}{pi}{sup 0}{pi}{sup 0}{sigma}{sup 0} reaction is studied within a chiral unitary model. The distribution of {pi}{sup 0}{sigma}{sup 0} states forming the {lambda}(1405) shows, in agreement with a recent experiment, a peak at 1420 MeV and a relatively narrow width of {gamma}=38 MeV. The mechanism for the reaction is largely dominated by the emission of a {pi}{sup 0} prior to the K{sup -}p interaction leading to the {lambda}(1405). This ensures the coupling of the {lambda}(1405) to the K{sup -}p channel, thus maximizing the contribution of the second state found in chiral unitary theories, which is narrow and of higher energy than the nominal {lambda}(1405). This is unlike the {pi}{sup -}p{yields}K{sup 0}{pi}{sigma} reaction, which gives more weight to the pole at lower energy and with a larger width. The data of these two experiments, together with the present theoretical analysis, provide firm evidence of the two-pole structure of the {lambda}(1405) | - |
dc.format.extent | 4 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | eng |
dc.publisher | American Physical Society | eng |
dc.relation.isformatof | Reproducció digital del document proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevLett.95.052301 | cat |
dc.relation.ispartof | Physical Review Letters, 2005, vol. 95, núm. 5, p. 052301-1-052301-4 | cat |
dc.relation.uri | https://doi.org/10.1103/physrevlett.95.052301 | - |
dc.relation.uri | http://dx.doi.org/10.1103/PhysRevLett.95.052301 | - |
dc.rights | (c) American Physical Society, 2005 | eng |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Partícules (Física nuclear) | cat |
dc.subject.classification | Teoria de camps (Física) | cat |
dc.subject.other | Particles (Nuclear physics) | eng |
dc.subject.other | Field theory (Physics) | eng |
dc.title | Evidence for the two pole structure of the Lambda(1405) resonance | eng |
dc.type | info:eu-repo/semantics/article | eng |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 528045 | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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528045.pdf | 138.51 kB | Adobe PDF | View/Open |
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