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Titolo:
4-POINT CURRENT-CURRENT INTERACTIONS FOR NONMESONIC WEAK DECAY OF HYPERNUCLEI HE-4(LAMBDA), HE-5(LAMBDA) AND C-12(LAMBDA)
Autore:
JUN JH; KIM D; BHANG HC;
Indirizzi:
CHUNG ANG UNIV,DEPT PHYS SEOUL 156756 SOUTH KOREA SUNG KYUN KWAN UNIV,DEPT PHYS SUWON 440746 SOUTH KOREA SEOUL NATL UNIV,DEPT PHYS SEOUL 151742 SOUTH KOREA
Titolo Testata:
Nuclear physics. A
fascicolo: 1-2, volume: 639, anno: 1998,
pagine: 337 - 340
SICI:
0375-9474(1998)639:1-2<337:4CIFNW>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
LAMBDA-HYPERNUCLEI;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
J.H. Jun et al., "4-POINT CURRENT-CURRENT INTERACTIONS FOR NONMESONIC WEAK DECAY OF HYPERNUCLEI HE-4(LAMBDA), HE-5(LAMBDA) AND C-12(LAMBDA)", Nuclear physics. A, 639(1-2), 1998, pp. 337-340

Abstract

One of the most urgent issues in Lambda-hypernuclear physics today ishow to resolve the difficulty in explaining the total and partial decay rates Gamma(nm) = Gamma(n) + Gamma(p) and the ratio Gamma(n)/Gamma(p) in the nonmesonic weak decay (NMWD) of hypernuclei [1]. There have been a few theoretical treatments of this isuue: (1) various meson-exchange models, especially pion-exchange models (OPE) with the Delta I =1/2 rule [2], (3) hybrid quark models [3], and (3) phenomenological models [4]. Yet, a complete understanding of NMWD has not been achieved. Other mechanisms might still be needed to resolve the issue. Here, we would like to suggest a new mechanism to resolve the nonmesonic decay problem. We believe, in addition to the pion-exchange interaction [2], the following 4-point current-current interactions (4P) play an important role [5].

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Documento generato il 02/07/20 alle ore 22:22:22