Role of ground-state correlations in hypernuclear nonmesonic weak decay
The contribution of ground-state correlations (GSCs) to the nonmesonic weak decay of ¹²<sub>Λ</sub>C and other medium to heavy hypernuclei is studied within a nuclear-matter formalism implemented in a local-density approximation. We adopt a weak transition potential including the exchang...
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2010
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/126145 |
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I19-R120-10915-126145 |
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dspace |
| institution |
Universidad Nacional de La Plata |
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I-19 |
| repository_str |
R-120 |
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SEDICI (UNLP) |
| language |
Inglés |
| topic |
Física Elementary particle Physics Carbon-12 Nucleon Atomic physics Isospin Hadron Meson Ground state Mass number |
| spellingShingle |
Física Elementary particle Physics Carbon-12 Nucleon Atomic physics Isospin Hadron Meson Ground state Mass number Bauer, Eduardo Garbarino, G. Role of ground-state correlations in hypernuclear nonmesonic weak decay |
| topic_facet |
Física Elementary particle Physics Carbon-12 Nucleon Atomic physics Isospin Hadron Meson Ground state Mass number |
| description |
The contribution of ground-state correlations (GSCs) to the nonmesonic weak decay of ¹²<sub>Λ</sub>C and other medium to heavy hypernuclei is studied within a nuclear-matter formalism implemented in a local-density approximation. We adopt a weak transition potential including the exchange of the complete octets of pseudoscalar and vector mesons, as well as a residual strong interaction modeled on the Bonn potential. Leading GSC contributions, at first order in the residual strong interaction, are introduced on the same footing for all isospin channels of one- and two-nucleon induced decays. Together with fermion antisymmetrization, GSCs turn out to be important for an accurate determination of the decay widths. Besides opening the two-nucleon stimulated decay channels, for ¹²<sub>Λ</sub>C GSCs are responsible for 14% of the rate Γ₁ while increasing the Γ<sub>n</sub> / Γ<sub>p</sub> ratio by 4 % . Our final results for ¹²<sub>Λ</sub>C are Γ<sub>NM</sub> = 0.98, Γ<sub>n</sub> / Γ<sub>p</sub> = 0.34 , and Γ₂ / Γ<sub>NM</sub> = 0.26 . The saturation property of Γ NM with increasing hypernuclear mass number is clearly observed. The agreement with data of our predictions for Γ<sub>NM</sub>, Γ<sub>n</sub> / Γ<sub>p</sub> , and Γ₂ is rather good. |
| format |
Articulo Articulo |
| author |
Bauer, Eduardo Garbarino, G. |
| author_facet |
Bauer, Eduardo Garbarino, G. |
| author_sort |
Bauer, Eduardo |
| title |
Role of ground-state correlations in hypernuclear nonmesonic weak decay |
| title_short |
Role of ground-state correlations in hypernuclear nonmesonic weak decay |
| title_full |
Role of ground-state correlations in hypernuclear nonmesonic weak decay |
| title_fullStr |
Role of ground-state correlations in hypernuclear nonmesonic weak decay |
| title_full_unstemmed |
Role of ground-state correlations in hypernuclear nonmesonic weak decay |
| title_sort |
role of ground-state correlations in hypernuclear nonmesonic weak decay |
| publishDate |
2010 |
| url |
http://sedici.unlp.edu.ar/handle/10915/126145 |
| work_keys_str_mv |
AT bauereduardo roleofgroundstatecorrelationsinhypernuclearnonmesonicweakdecay AT garbarinog roleofgroundstatecorrelationsinhypernuclearnonmesonicweakdecay |
| bdutipo_str |
Repositorios |
| _version_ |
1764820450142060544 |