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http://hdl.handle.net/2445/10991
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DC Field | Value | Language |
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dc.contributor.author | Parreño García, Assumpta | cat |
dc.contributor.author | Ramos Gómez, Àngels | cat |
dc.contributor.author | Bennhold, Cornelius | cat |
dc.date.accessioned | 2010-01-28T17:04:27Z | - |
dc.date.available | 2010-01-28T17:04:27Z | - |
dc.date.issued | 2001 | cat |
dc.identifier.issn | 0556-2813 | cat |
dc.identifier.uri | http://hdl.handle.net/2445/10991 | - |
dc.description.abstract | The strangeness-changing ($\Delta S = 1$) weak baryon-baryon interaction is studied through the nonmesonic weak decay of double-$\Lambda$ hypernuclei. Besides the usual nucleon-induced decay $\Lambda N \to N N$ we discuss novel hyperon-induced decay modes $\Lambda \Lambda \to \Lambda N$ and $\Lambda \Lambda \to \Sigma N$. These reactions provide unique access to the exotic $\Lambda \Lambda$K and $\Lambda \Sigma$K vertices which place new constraints on Chiral Pertubation Theory ($\chi$PT) in the weak SU(3) sector. Within a meson-exchange framework, we use the pseudoscalar $\pi,\eta,K$ octet for the long-range part while parametrizing the short-range part through the vector mesons $\rho, \omega, K^*$. Realistic baryon-baryon forces for the $S=0,-1$ and -2 sectors account for the strong interaction in the initial and final states. For $^6_{\Lambda \Lambda}$He the new hyperon-induced decay modes account for up to 4% of the total nonmesonic decay rate. Predictions are made for all possible nonmesonic decay modes. | - |
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.65.015205 | cat |
dc.relation.ispartof | Physical Review C, 2002, vol. 65, núm. 1, p. 015205-1-015205-11 | cat |
dc.relation.uri | http://doi.org/10.1103/PhysRevC.65.015205 | - |
dc.rights | (c) The American Physical Society, 2001 | cat |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Estructura nuclear | cat |
dc.subject.classification | Reaccions nuclears | cat |
dc.subject.classification | Interaccions febles (Física nuclear) | cat |
dc.subject.other | Nuclear structure | eng |
dc.subject.other | Nuclear reactions | eng |
dc.subject.other | Weak interactions (Nuclear physics) | eng |
dc.title | Novel weak decays in doubly strange systems | eng |
dc.type | info:eu-repo/semantics/article | eng |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 193852 | 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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193852.pdf | 132.54 kB | Adobe PDF | View/Open |
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