Critical review of [K- ppn] bound states

Abstract

We make a thorough study of the process of three body kaon absorption in nuclei, in connection with a recent FINUDA experiment which claims the existence of a deeply bound kaonic state from the observation of a peak in the Lambda d invariant mass distribution following K- absorption on Li6. We show that the peak is naturally explained in terms of K- absorption from three nucleons leaving the rest as spectators. We can also reproduce all the other observables measured in the same experiment and used to support the hypothesis of the deeply bound kaon state. Our study also reveals interesting aspects of kaon absorption in nuclei, a process that must be understood in order to make progress in the search for K- deeply bound states in nuclei.

arXiv comment8 pages, 7 figures. New section "Empirical qualitative discussion of the strength of the reaction" with one new figure is added. Published in PRC

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• Strangeness Production close to Threshold in Proton-Nucleus and Heavy-Ion Collisions
• Variational calculation of the ppK^- system based on chiral SU(3) dynamics
• A method to measure the antikaon-nucleon scattering length in lattice QCD
• Strangeness nuclear physics: a critical review on selected topics
• Observation of the "$K^{-}pp$"-like structure in the $d({\pi }^{+},K^{+})$ reaction at 1.69 GeV/$c$
• Strange mesons in nuclear matter at finite temperature
• A new perspective on the Faddeev equations and the $\bar{K}NN$ system from chiral dynamics and unitarity in coupled channels
• 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
• Correlated $\Lambda t$ pairs from the absorption of $K^{-}$ at rest in light nuclei
• Proton emission off nuclei induced by kaons in flight
• Latest results for the antikaon-nucleon optical potential
• Kaon pair production in proton-nucleus collisions at 2.83 GeV kinetic energy
• Relativistic symmetry breaking in light kaonic nuclei
• The (K-,p) reaction on nuclei with in-flight kaons
• K- absorption in nuclei by two and three nucleons