Lambda(1405)-induced non-mesonic decay in kaonic nuclei

Abstract

Non-mesonic decay of kaonic nuclei is investigated under a Lambda(1405) doorway picture where the Kbar absorptions in nuclei take place through the Lambda(1405) resonance. Calculating Lambda(1405) N to YN transitions in one-meson exchange, we find that the non-mesonic decay ratio Gamma_{Lambda N} / Gamma_{Sigma^{0} N} depends strongly on the ratio of the couplings Lambda(1405)-Kbar N and Lambda(1405)-pi Sigma. Especially a larger Lambda(1405)-Kbar N coupling leads to enhancement of the decay to Lambda N. Using the chiral unitary approach for description of the Kbar N amplitudes, we obtain Gamma_{Lambda N} / Gamma_{Sigma ^{0} N} \approx 1.2 almost independently of the nucleon density, and find the total two-nucleon absorption of the Kbar in uniform nuclear matter to be 22 MeV at the normal density.

5 pages, 4 figures

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Cited by in corpus (23)

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• Chirally motivated K^- nuclear potentials
• Observation of the "$K^{-}pp$"-like structure in the $d({\pi }^{+},K^{+})$ reaction at 1.69 GeV/$c$
• A narrow $DNN$ quasi-bound state
• On the structure observed in the in-flight ${}^3\text{He}(K^{-},\Lambda p)n$ reaction at J-PARC
• Few-body approach to structure of $\bar{K}$-nuclear quasi-bound states
• Branching ratios of mesonic and nonmesonic antikaon absorptions in nuclear medium
• K${}^{-}$ multi-nucleon absorption cross sections and branching ratios in $\Lambda$p and ${\Sigma }^0$p final states
• Antikaon interactions with nucleons and nuclei
• $K^{-}$- nuclear states: Binding energies and widths
• The Lambda* N interaction and two-body bound state based on chiral dynamics
• DISTO data on Kpp
• The nature of Lambda(1405) hyperon resonance in chiral dynamics
• Formation spectra of light kaonic nuclei by in-flight ($\bar{K},N$) reactions with chiral unitary amplitude
• Single- and two-nucleon antikaon absorption in nuclear matter with chiral meson-baryon interactions
• Are there any narrow $K^{-}$- nuclear states?
• Study of the p$-$p$-$K${}^{+}$ and p$-$p$-$K${}^{-}$ dynamics using the femtoscopy technique
• Mesonic and non-mesonic branching ratios of K^- absorption in the nuclear medium
• $\bar{K}\bar{D}N$ molecular state as a "$uuds\bar{c}$ pentaquark" in a three-body calculation
• Molecule model for kaonic nuclear cluster anti-KNN
• A new N* resonance as a hadronic molecular state
• The Peak Structure in the In-Flight ${}^3\text{He}(K^{-},\Lambda p)n$ Reaction Around the $\bar{K}NN$ Threshold
• Lambda(1405) N to Y N transition in nuclear medium for non-mesonic absorption of Kbar in nucleus