Recent Achievements in Hypernuclear Physics

Feliciello, A.

doi:10.1007/s00601-013-0759-1

Cited by 2 publications

(2 citation statements)

References 35 publications

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“…A first difference comes from the mean lifetimes of the two hyperons: τ Λ + c ∼ 10 −3 τ Λ . While the mean lifetime of the NMWD (1) is of the same order of magnitude of the full mean lifetime of Λ in free space, no theoretical estimate has been made for the decays (2) and (3). In addition, while the free-space decay of Λ is dominated by the pionic channels Λ → pπ − and Λ → nπ 0 , with other decay channels contributing a thousand times less, Λ + c decays in two semileptonic and numerous hadronic channels with S = −1 final states, having branching ratios of a few percent each.…”

Section: Introductionmentioning

confidence: 99%

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Relativistic model for the nonmesonic weak decay of single-lambda hypernuclei

Fontoura

Krmpotić

Galeão

et al. 2016

J. Phys. G: Nucl. Part. Phys.

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Having in mind its future extension for theoretical investigations related to charmed nuclei, we develop a relativistic formalism for the nonmesonic weak decay of single-Λ hypernuclei in the framework of the independent-particle shell model and with the dynamics represented by the (π, K) one-meson-exchange model. Numerical results for the one-nucleon-induced transition rates of 12 Λ C are presented and compared with those obtained in the analogous nonrelativistic calculation. There is satisfactory agreement between the two approaches, and the most noteworthy difference is that the ratio Γn/Γp is appreciably higher and closer to the experimental value in the relativistic calculation. Large discrepancies between ours and previous relativistic calculations are found, for which we do not encounter any fully satisfactory explanation. The most recent experimental data is well reproduced by our results. In summary, we have achieved our purpose to develop a reliable model for the relativistic calculation of the nonmesonic weak decay of Λ-hypernuclei, which can now be extended to evaluate similar processes in charmed nuclei.

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Section: Introductionmentioning

confidence: 99%

“…The best-known nuclei within the last category are those where a Λ-hyperon, with strangeness 1 = -S , replaces one of the nucleons, giving to the composed system some quite unusual properties. Such nuclei are referred to as Λ-hypernuclei -for recent reviews, see [1,2].…”

Section: Introductionmentioning

confidence: 99%