Ground state normalization in the nonmesonic weak decay of 12ΛC hypernucleus within a nuclear matter formalism

✍ Scribed by E. Bauer

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 189 KB
• Volume: 818
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/j.nuclphysa.2008.12.008

✦ Synopsis

The nonmesonic weak decay width of 12 Λ C hypernucleus has been evaluated within a nuclear matter formalism, using the local density approximation. In addition to the one-body induced decay (ΛN → nN ), it has been also considered the two-body induced decay (ΛN N → nNN). This second decay is originated from ground state correlations, where a renormalization procedure to ensure a ground state normalized to one has been implemented. Our results show that the plain addition of the two-body induced decay implies a lost in the ground state-norm, which adds ∼ 38% of spurious strength to the nonmesonic weak decay width. Within our scheme, it is possible to reproduce the most recent data for the nonmesonic weak decay width of 12 Λ C.