First application of a microscopic $K^{-}NN$ absorption model in calculations of kaonic atoms

Abstract

Strong interaction energy shifts and widths in kaonic atoms are calculated for the first time using microscopic $K^{-}N$ + $K^{-}NN$ potentials derived from $K^{-}N$ scattering amplitudes constructed within SU(3) chiral coupled-channels models of meson-baryon interactions. The in-medium modifications of the free-space amplitudes due to the Pauli correlations are taken into account. The $K^{-}N+K^{-}NN$ potentials evaluated for 23 nuclear species are confronted with kaonic atoms data. The description of the data significantly improves when the $K^{-}NN$ absorption is included. To get ${\chi }^2$ as low as for the $K^{-}N+$phenomenological multi-nucleon potential an additional phenomenological term, accounting for $K^{-}-3N(4N)$ processes, is still needed. However, density dependence of this phenomenological term points out some deficiencies in the microscopic potentials and further improvements of the applied model are thus desirable. The calculated branching ratios for $K^{-}N$ and $K^{-}NN$ absorption channels in the ${}^{12}$C$+K^{-}$ atom are in reasonable agreement with the old bubble chamber data, as well as with the latest data from the AMADEUS Collaboration.

arXiv comment24 pages, 7 figures, 7 tables

References in corpus (26)

• A New Measurement of Kaonic Hydrogen X rays
• Chiral SU(3) theory of antikaon-nucleon interactions with improved threshold constraints
• The properties of \bar{K} in the nuclear medium
• Nuclear kaon dynamics
• K${}^{-}$-proton scattering and the $\Lambda (1405)$ in dense matter
• Measurement of the Sigma pi photoproduction line shapes near the Lambda(1405)
• Study of chirally motivated low-energy $K^{-}$ optical potentials
• Effective kaon mass in dense baryonic matter: role of correlations
• Kaonic hydrogen X-ray measurement in SIDDHARTA
• Lineshape of the Lambda(1405) Hyperon Measured Through its Sigma0 pion0 Decay
• Chiral Dynamics of Deeply Bound Pionic Atoms
• Photoproduction of Lambda(1405) and Sigma^{0}(1385) on the proton at E_γ= 1.5-2.4 GeV
• Chirally motivated $\bar{K}N$ amplitudes for in-medium applications
• Chirally motivated K^- nuclear potentials
• eta-prime nucleus optical potential and possible eta-prime bound states
• K${}^{-}$ absorption on two nucleons and ppK${}^{-}$ bound state search in the ${\Sigma }^0$p final state
• $S=-1$ meson-baryon interaction and the role of isospin filtering processes
• $K^{-}N$ amplitudes below threshold constrained by multinucleon absorption
• Baryonic resonances close to the Kbar-N threshold: the case of Sigma(1385)^+ in pp collisions
• Kaonic atoms and in-medium K-N amplitudes II: interplay between theory and phenomenology
• Branching ratios of mesonic and nonmesonic antikaon absorptions in nuclear medium
• $K^{-}$- nuclear states: Binding energies and widths
• K${}^{-}$ multi-nucleon absorption cross sections and branching ratios in $\Lambda$p and ${\Sigma }^0$p final states
• Single- and two-nucleon antikaon absorption in nuclear matter with chiral meson-baryon interactions
• Are there any narrow $K^{-}$- nuclear states?
• ${\Sigma }^{-}p$ emission rates in $K^{-}$ absorptions at rest on ${}^6$Li, ${}^7$Li, ${}^9$Be, ${}^{13}$C and ${}^{16}$O