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https://hdl.handle.net/2445/11005
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DC Field | Value | Language |
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dc.contributor.author | Tolós Rigueiro, Laura | cat |
dc.contributor.author | Polls Martí, Artur | cat |
dc.contributor.author | Ramos Gómez, Àngels | cat |
dc.contributor.author | Schaffner-Bielich, Jürgen | cat |
dc.date.accessioned | 2010-01-29T09:56:34Z | - |
dc.date.available | 2010-01-29T09:56:34Z | - |
dc.date.issued | 2003 | catt |
dc.identifier.issn | 0556-2813 | ca |
dc.identifier.uri | https://hdl.handle.net/2445/11005 | - |
dc.description.abstract | The $K^-/K^+$ ratio produced in heavy-ion collisions at GSI energies is studied. The in-medium properties at finite temperature of the hadrons involved are included, paying a special attention to the in-medium properties of antikaons. Using a statistical approach, it is found that the determination of the temperature and chemical potential at freeze-out conditions compatible with the ratio $K^-/K^+$ is very delicate, and depends very strongly on the approximation adopted for the antikaon self-energy. The use of an energy dependent $\bar{K}$ spectral density, including both s and p-wave components of the $\bar{K}N$ interaction, lowers substantially the freeze-out temperature compared to the standard simplified mean-field treatment and gives rise to an overabundance of $K^-$ production in the dense and hot medium. Even a moderately attractive antikaon-nucleus potential obtained from our self-consistent many-body calculation does reproduce the ``broad-band equilibration'' advocated by Brown, Rho and Song due to the additional strength of the spectral function of the $K^-$ at low energies | - |
dc.format.extent | 11 p. | cat |
dc.format.mimetype | application/pdf | eng |
dc.language.iso | eng | eng |
dc.publisher | The American Physical Society | cat |
dc.relation.isformatof | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevC.68.024903 | cat |
dc.relation.ispartof | Physical Review C, 2003, vol. 68, núm. 2, p. 024903-1, 024903-11 | cat |
dc.relation.uri | http://doi.org/10.1103/PhysRevC.68.024903 | - |
dc.rights | (c) The American Physical Society, 2003 | cat |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Reaccions nuclears | cat |
dc.subject.classification | Constitució de la matèria | cat |
dc.subject.classification | Col·lisions (Física nuclear) | cat |
dc.subject.other | Nuclear reactions | eng |
dc.subject.other | Constitution of matter | eng |
dc.subject.other | Collisions (Nuclear physics) | eng |
dc.title | K^-/K^+ ratio in heavy-ion collisions with an antikaon self-energy in hot and dense matter | eng |
dc.type | info:eu-repo/semantics/article | eng |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 511443 | cat |
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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511443.pdf | 142.09 kB | Adobe PDF | View/Open |
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