A theoretical overview of hypernuclear weak decay

✍ Scribed by C. Chumillas; G. Garbarino; A. Parreño; A. Ramos

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 116 KB
• Volume: 804
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/j.nuclphysa.2008.01.021

✦ Synopsis

The physics of the weak decay of hypernuclei is briefly reviewed from a theoretical point of view. Special regard is devoted to the recent progress concerning the determination of the non-mesonic decay widths and the asymmetry parameters. Convincing evidence has been achieved for a solution of the long-standing puzzle on the ratio Γ n /Γ p . Very recently, it has been shown that the exchange of a ππ pair in the weak mechanism plays a crucial role in explaining the discrepancies between theory and experiment on the decay asymmetries.