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DC Field | Value | Language |
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dc.contributor.author | Tolós Rigueiro, Laura | cat |
dc.contributor.author | Cabrera, D. | cat |
dc.contributor.author | Ramos Gómez, Àngels | cat |
dc.date.accessioned | 2010-04-22T11:56:14Z | - |
dc.date.available | 2010-04-22T11:56:14Z | - |
dc.date.issued | 2008 | - |
dc.identifier.issn | 0556-2813 | - |
dc.identifier.uri | http://hdl.handle.net/2445/12225 | - |
dc.description.abstract | We study the properties of K and K mesons in nuclear matter at finite temperature from a chiral unitary approach in coupled channels that incorporates the s and p waves of the kaon-nucleon interaction. The in-medium solution accounts for Pauli blocking effects, mean-field binding on all the baryons involved, and {pi} and kaon self-energies. We calculate K and K (off-shell) spectral functions and single-particle properties. The K effective mass gets lowered by about -50 MeV in cold nuclear matter at saturation density and by half this reduction at T=100 MeV. The p-wave contribution to the K optical potential, due to {lambda},{sigma}, and {sigma}* excitations, becomes significant for momenta larger than 200 MeV/c and reduces the attraction felt by the K in the nuclear medium. The K spectral function spreads over a wide range of energies, reflecting the melting of the {lambda}(1405) resonance and the contribution of YN{sup -1} components at finite temperature. In the KN sector, we find that the low-density theorem is a good approximation for the K self-energy close to saturation density due to the absence of resonance-hole excitations. The K potential shows a moderate repulsive behavior, whereas the quasiparticle peak is considerably broadened with increasing density andmore » temperature. We discuss the implications for the decay of the {phi} meson at GSI Schwerionen Synchrotron energies as well as in the future Facility for Antiproton and Ion Research project.« less | - |
dc.format.extent | 18 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | eng |
dc.publisher | The American Physical Society | eng |
dc.relation.isformatof | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevC.78.045205 | cat |
dc.relation.ispartof | Physical Review C, 2008, vol. 78, núm. 4, p. 045205-1-045205-18 | cat |
dc.relation.uri | http://dx.doi.org/10.1103/PhysRevC.78.045205 | - |
dc.rights | (c) The American Physical Society, 2008 | eng |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Mesons (Física nuclear) | cat |
dc.subject.classification | Constitució de la matèria | cat |
dc.subject.classification | Col·lisions (Física nuclear) | cat |
dc.subject.other | Mesons | eng |
dc.subject.other | Constitution of matter | eng |
dc.subject.other | Collisions (Nuclear physics) | eng |
dc.title | Strange mesons in nuclear matter at finite temperature | eng |
dc.type | info:eu-repo/semantics/article | eng |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 561207 | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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File | Description | Size | Format | |
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561207.pdf | 724.36 kB | Adobe PDF | View/Open |
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