A critical view on the deeply bound K^- pp system

Abstract

We briefly review the situation around the claimed deeply bound K^- states in different recent experiments and concentrate particularly on the state K^- pp advocated by the FINUDA collaboration in nuclear K^- absorption. We perform a theoretical simulation of the process and show that the peak in the Lambda p spectrum that was interpreted as a deep K^- pp bound state corresponds mostly to the process K^- p p --> Lambda p followed by final state interactions of the produced particles with the daughter nucleus.

11 pages, 14 figures

References in corpus (15)

• Chiral dynamics in the presence of bound states: kaon-nucleon interactions revisited
• Chiral Dynamics of the Two Λ(1405) States
• The properties of \bar{K} in the nuclear medium
• Evidence for the two pole structure of the Lambda(1405) resonance
• Flavor SU(3) breaking effects in the chiral unitary model for meson-baryon scatterings
• Chiral dynamics of kaon-nucleon interactions, revisited
• Medium Modified Cross Sections, Temperature and Finite Momentum Effects for Antikaon Production in Heavy-Ion Collisions
• Study of chirally motivated low-energy $K^{-}$ optical potentials
• $\bar{K}$ nuclear bound states in a dynamical model
• Surprises in threshold antikaon-nucleon physics
• Deeply bound levels in kaonic atoms
• Strange tribaryons as Kbar-mediated dense nuclear systems
• A critical analysis on deeply bound kaonic states in nuclei
• $K^{-}$ and $\bar{p}$ deeply bound atomic states
• Evidence for an Excited Hyperon State in pp -> p K^+ Y^{0*}

Cited by in corpus (68)

• Strangeness in nuclear physics
• Effective Kbar N interaction based on chiral SU(3) dynamics
• Faddeev calculation of a $K^{-}pp$ quasi-bound state
• Strange dibaryon resonance in the anti-KNN--piYN system
• Variational calculation of the ppK^- system based on chiral SU(3) dynamics
• The basic K nuclear cluster K- pp and its enhanced formation in the p + p -> K+ + X reaction
• $\bar{K}NN$ quasi-bound state and the $\bar{K}N$ interaction: coupled-channel Faddeev calculations of the $\bar{K}NN-\pi \Sigma N$ system
• $K^{-}pp$ system with chiral SU(3) effective interaction
• Studying Exotic Hadrons in Heavy Ion Collisions
• On the History of Dibaryons and their Final Observation
• $\bar{K}$ nuclear bound states in a dynamical model
• Meson-nucleus potentials and the search for meson-nucleus bound states
• Resonance energy of the barKNN-piYN system
• Variational calculations for K-few-nucleon systems
• Partial Wave Analysis of the Reaction $p(3.5GeV)+p\to p{K}^{+}\Lambda$ to Search for the "$pp{K}^{-}$" Bound State
• Strangeness nuclear physics: a critical review on selected topics
• Search for $K^{-}pp$ bound state via $\gamma d\to K^{+}{\pi }^{-}X$ reaction at $E_{\gamma }=1.5-2.4$ GeV
• Observation of the "$K^{-}pp$"-like structure in the $d({\pi }^{+},K^{+})$ reaction at 1.69 GeV/$c$
• K${}^{-}$ absorption on two nucleons and ppK${}^{-}$ bound state search in the ${\Sigma }^0$p final state
• anti-K anti-K N molecule state in three-body calculation
• The $\bar{K}NN$ system with chiral dynamics
• A narrow $DNN$ quasi-bound state
• Strange mesons in nuclear matter at finite temperature
• Chiral SU(3) Dynamics and Antikaon-Nuclear quasibound States
• Cross-channel constraints on resonant antikaon-nucleon scattering
• A new perspective on the Faddeev equations and the $\bar{K}NN$ system from chiral dynamics and unitarity in coupled channels
• Emission spectra and invariant masses of Lambda and p in the stopped-K-NN absorption process in 4He and 6Li
• Branching ratios of mesonic and nonmesonic antikaon absorptions in nuclear medium
• Search for the deeply bound $K^{-}pp$ state from the semi-inclusive forward-neutron spectrum in the in-flight $K^{-}$ reaction on helium-3
• K${}^{-}$ multi-nucleon absorption cross sections and branching ratios in $\Lambda$p and ${\Sigma }^0$p final states
• Critical review of [K- ppn] bound states
• Fully coupled-channel study of $K^{-}pp$ resonance in a chiral SU(3)-based $\bar{K}N$ potential
• Interplay between kaon condensation and hyperons in highly dense matter
• Application of a coupled-channel Complex Scaling Method with Feshbach projection to the $K^{-}pp$ system
• Calculation of the ${}^3$He(in-flight $K^{-}$,$n$) reaction for searching the deeply-bound $K^{-}pp$ state
• The properties of kaonic nuclei in relativistic mean-field theory
• Formation spectra of light kaonic nuclei by in-flight ($\bar{K},N$) reactions with chiral unitary amplitude
• Comprehensive application of a coupled-channel complex scaling method to the KbarN-piY system
• ppK- bound states from Skyrmions
• Radial sensitivity of kaonic atoms and strongly bound $\bar{K}$ states
• Deeply-bound $K^{-}pp$ state in the ${}^3$He(in-flight $K^{-}$, $n$) spectrum and its moving pole near the $\pi \Sigma N$ threshold
• Kaon Absorption from Kaonic Atoms and Formation Spectra of Kaonic Nuclei
• Proton emission off nuclei induced by kaons in flight
• Quadruply charmed baryons as heavy quark symmetry partners of the $D_{s0}^{\ast }(2317)$
• Kaon-condensed hypernuclei as highly dense self-bound objects
• One way to verify the molecular picture of exotic hadrons --from $DK$ to $DDK/D{\bar{D}}^{(\ast )}K$
• Microscopic 8-quark study of the antikaon nucleon nucleon systems
• Formation of Deeply Bound Kaonic Atoms in (K^-,N) Reactions
• Study of $K^{-}$ absorption at rest in nuclei followed by $p\Lambda$ emission
• Lambda(1405) in a baryon-meson scattering with a bound state embedded in the continuum
• Latest results for the antikaon-nucleon optical potential
• Relativistic symmetry breaking in light kaonic nuclei
• Further considerations concerning claims for deeply bound kaon atoms and reply to criticisms
• Charge-conjugation asymmetry and molecular content: the $D_{s0}^{\ast }(2317{)}^{\pm }$ in matter
• K^- ^3He and K^+K^- interactions in the pd -> ^3He K^+K^- reaction
• The effect of Kaon Condensation on Quark-Antiquark Condensate in Dense Matter
• Overview of Antikaon-Nuclear Quasi-Bound States
• Binding of antikaons and Lambda(1405) clusters in light kaonic nuclei
• Nuclear bound states of antikaons, or quantized multiskyrmions?
• Novel halos in light kaonic nuclei as an indicator of nuclear equation of state at supra-normal densities
• Antikaon-nucleus dynamics: from quasibound states to kaon condensation
• The (K-,p) reaction on nuclei with in-flight kaons
• Chiral SU(3) dynamics and the quasibound K^-pp cluster
• K- absorption in nuclei by two and three nucleons
• Ground-state properties of light kaonic nuclei signaling symmetry energy at high densities
• Recent developments in chiral dynamics of hadrons and hadrons in a nuclear medium
• Effective Kbar N interaction with strong pi Sigma dynamics constrained by chiral SU(3) symmetry
• 3- and 4- body meson- nuclear clusters