| 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 |
|