Quantum interference terms in nonmesonic weak decay of Λ-hypernuclei within a RPA formalism

Single and double coincidence nucleon spectra in the Λ-hypernuclei weak decay are evaluated and discussed using a microscopic formalism. Nuclear matter is employed together with the local density approximation which allows us to analyze the 12Λ C hypernucleus non-mesonic weak decay. Final state int...

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Autor principal: Bauer, Eduardo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2007
Materias:
Física
Λ-hypernuclei
Non-mesonic decay of hypernuclei
Γ n / Γ p ratio
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/129348
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-129348
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Λ-hypernuclei
Non-mesonic decay of hypernuclei
Γ n / Γ p ratio
spellingShingle Física
Λ-hypernuclei
Non-mesonic decay of hypernuclei
Γ n / Γ p ratio
Bauer, Eduardo
Quantum interference terms in nonmesonic weak decay of Λ-hypernuclei within a RPA formalism
topic_facet Física
Λ-hypernuclei
Non-mesonic decay of hypernuclei
Γ n / Γ p ratio
description Single and double coincidence nucleon spectra in the Λ-hypernuclei weak decay are evaluated and discussed using a microscopic formalism. Nuclear matter is employed together with the local density approximation which allows us to analyze the 12Λ C hypernucleus non-mesonic weak decay. Final state interactions (F SI) are included via the first order (in the nuclear residual interaction) terms to the RPA, where the strong residual interaction is modelled by a Bonn potential. At this level of approximation, these F SI are pure quantum interference terms between the primary decay (Λ N → NN) and (Λ N → NN → NN), where the strong interaction is responsible for the last piece in the second reaction. Also the Pauli exchange contributions are explicitly evaluated. We show that the inclusion of Pauli exchange terms is important. A comparison with data is made. We conclude that the limitations in phase space in the RPA makes this approximation inadequate to reproduce the nucleon spectra. This fact, does not allow us to draw a definite conclusion about the importance of the interference terms.
format Articulo
Articulo
author Bauer, Eduardo
author_facet Bauer, Eduardo
author_sort Bauer, Eduardo
title Quantum interference terms in nonmesonic weak decay of Λ-hypernuclei within a RPA formalism
title_short Quantum interference terms in nonmesonic weak decay of Λ-hypernuclei within a RPA formalism
title_full Quantum interference terms in nonmesonic weak decay of Λ-hypernuclei within a RPA formalism
title_fullStr Quantum interference terms in nonmesonic weak decay of Λ-hypernuclei within a RPA formalism
title_full_unstemmed Quantum interference terms in nonmesonic weak decay of Λ-hypernuclei within a RPA formalism
title_sort quantum interference terms in nonmesonic weak decay of λ-hypernuclei within a rpa formalism
publishDate 2007
url http://sedici.unlp.edu.ar/handle/10915/129348
work_keys_str_mv AT bauereduardo quantuminterferencetermsinnonmesonicweakdecayoflhypernucleiwithinarpaformalism
bdutipo_str Repositorios
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