Nonmesonic weak decay of Λ hypernuclei: The three-nucleon induced mode

The nonmesonic weak decay of 3hypernuclei is studied within a microscopic diagrammatic approach which is extended to include the three-nucleon induced mechanism. We adopt a nuclear matter formalism which, through the local density approximation, allows us to model finite hypernuclei, a one-meson-exc...

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Autores principales: Bauer, Eduardo, Garbarino, G., Rodríguez Peña, Carlos Andrés
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Física
astrofísica
Λ hypernuclei, nonmesonic weak decay
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/74894
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-74894
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
astrofísica
Λ hypernuclei, nonmesonic weak decay
spellingShingle Física
astrofísica
Λ hypernuclei, nonmesonic weak decay
Bauer, Eduardo
Garbarino, G.
Rodríguez Peña, Carlos Andrés
Nonmesonic weak decay of Λ hypernuclei: The three-nucleon induced mode
topic_facet Física
astrofísica
Λ hypernuclei, nonmesonic weak decay
description The nonmesonic weak decay of 3hypernuclei is studied within a microscopic diagrammatic approach which is extended to include the three-nucleon induced mechanism. We adopt a nuclear matter formalism which, through the local density approximation, allows us to model finite hypernuclei, a one-meson-exchange weak transition potential and a Bonn nucleon–nucleon strong potential. One-, two-and three-nucleon induced weak decay rates are predicted for 123Cby including ground state correlations up to second order in the nucleon–nucleon potential and the recoil of the residual nucleus. Three-nucleon stimulated decays, 3NNN→nNNN(N=nor p), are considered here for the first time. The obtained decay rates compare well with the latest KEK and FINUDA data. The three-nucleon induced rate turns out to be dominated by nnp-and npp-induced decays, it amounts to ∼7%of the total nonmesonic rate and it is ∼1/2of the neutron-induced decay rate. The reduction effect of the nuclear recoil is particularly relevant for the three-nucleon induced rates (∼15%), less important for the two-nucleon induced rates (∼4%) and negligible for the one-nucleon induced rates. Given the non-negligible size of the three-nucleon induced contribution and consequently its importance in the precise determination of the complete set of decay rates, new measurements and/or experimental analysis are encouraged.
format Articulo
Articulo
author Bauer, Eduardo
Garbarino, G.
Rodríguez Peña, Carlos Andrés
author_facet Bauer, Eduardo
Garbarino, G.
Rodríguez Peña, Carlos Andrés
author_sort Bauer, Eduardo
title Nonmesonic weak decay of Λ hypernuclei: The three-nucleon induced mode
title_short Nonmesonic weak decay of Λ hypernuclei: The three-nucleon induced mode
title_full Nonmesonic weak decay of Λ hypernuclei: The three-nucleon induced mode
title_fullStr Nonmesonic weak decay of Λ hypernuclei: The three-nucleon induced mode
title_full_unstemmed Nonmesonic weak decay of Λ hypernuclei: The three-nucleon induced mode
title_sort nonmesonic weak decay of λ hypernuclei: the three-nucleon induced mode
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/74894
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AT garbarinog nonmesonicweakdecayoflhypernucleithethreenucleoninducedmode
AT rodriguezpenacarlosandres nonmesonicweakdecayoflhypernucleithethreenucleoninducedmode
bdutipo_str Repositorios
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