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| dc.creator | Parreño García, Assumpta | |
| dc.creator | Ramos Gómez, Àngels | |
| dc.creator | Bennhold, Cornelius | |
| dc.date | 2010-01-28T17:04:27Z | |
| dc.date | 2010-01-28T17:04:27Z | |
| dc.date | 2001 | |
| dc.date.accessioned | 2024-12-16T10:21:13Z | |
| dc.date.available | 2024-12-16T10:21:13Z | |
| dc.identifier | 0556-2813 | |
| dc.identifier | http://hdl.handle.net/2445/10991 | |
| dc.identifier | 193852 | |
| dc.identifier.uri | http://fima-docencia.ub.edu:8080/xmlui/handle/123456789/12316 | |
| dc.description | 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 | 11 p. | |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | The American Physical Society | |
| dc.relation | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevC.65.015205 | |
| dc.relation | Physical Review C, 2002, vol. 65, núm. 1, p. 015205-1-015205-11 | |
| dc.relation | http://doi.org/10.1103/PhysRevC.65.015205 | |
| dc.rights | (c) The American Physical Society, 2001 | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | |
| dc.subject | Estructura nuclear | |
| dc.subject | Reaccions nuclears | |
| dc.subject | Interaccions febles (Física nuclear) | |
| dc.subject | Nuclear structure | |
| dc.subject | Nuclear reactions | |
| dc.subject | Weak interactions (Nuclear physics) | |
| dc.title | Novel weak decays in doubly strange systems | |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion |
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