Chiral SU(3) theory of antikaon-nucleon interactions with improved threshold constraints

Abstract

$\bar{K}$-nucleon interactions are investigated in the framework of coupled-channels dynamics based on the next-to-leading order chiral SU(3) meson-baryon effective Lagrangian. A recent determination of the 1s shift and width of kaonic hydrogen enables us to set accurate constraints on the coupled-channels meson-baryon amplitudes in the strangeness $S=-1$ sector. Theoretical uncertainties in the subthreshold extrapolation of the coupled-channels amplitudes are discussed. Using this framework, we give predictions for $K^{-}$-neutron interactions and for the spectrum of the $\Lambda (1405)$ resonance. A simplified, effective three-channel model using leading order chiral SU(3) meson-baryon interactions is also constructed for convenient application in $\bar{K}$-nuclear few-body calculations.

24 pages, 7 figures

References in corpus (19)

• High Precision determination of the pi, K, D and D_s decay constants from lattice QCD
• Effective Kbar N interaction based on chiral SU(3) dynamics
• Faddeev calculation of a $K^{-}pp$ quasi-bound state
• K^- p scattering length from scattering experiments
• Strange dibaryon resonance in the anti-KNN--piYN system
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• On the Strangeness -1 S-wave Meson-Baryon Scattering
• Kaonic hydrogen X-ray measurement in SIDDHARTA
• Energy dependence of barKN interactions and resonance pole of strange dibaryons
• Photoproduction of Lambda(1405) and Sigma^{0}(1385) on the proton at E_γ= 1.5-2.4 GeV
• Resonance energy of the barKNN-piYN system
• Kaon-nucleon scattering lengths from kaonic deuterium experiments
• The ratio FK/Fpi in QCD
• Chiral SU(3) Dynamics and Antikaon-Nuclear quasibound States
• Kaonic hydrogen versus the $K^{-}p$ low energy data

Cited by in corpus (158)

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• $K^{-}p$ Correlation Function from High-Energy Nuclear Collisions and Chiral SU(3) Dynamics
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• Kaonic Atoms at the DA$\Phi$NE Collider with the SIDDHARTA-2 Experiment
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• Investigation of $qqqs\bar{q}$ pentaquarks in a chiral quark model
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• New insights in \bar{K}N scattering and the Λ(1405)
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