TY - JOUR
T1 - Chiral SU(3) theory of antikaon-nucleon interactions with improved threshold constraints
AU - Ikeda, Yoichi
AU - Hyodo, Tetsuo
AU - Weise, Wolfram
N1 - Funding Information:
We thank Avraham Gal for helpful comments and discussions. This work has been performed under the joint research cooperation agreement between RIKEN and Technische Universität München. It is partly supported by BMBF, GSI, the DFG Cluster of Excellence “Origin and Structure of the Universe”, and by the Grant-in-Aid for Scientific Research from MEXT and JSPS (Nos. 21840026 and 23-8687). T.H. thanks for support from the Global Center of Excellence Program by MEXT, Japan, through the Nanoscience and Quantum Physics Project of the Tokyo Institute of Technology.
PY - 2012/5/1
Y1 - 2012/5/1
N2 - 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 Λ(1405) resonance. A simplified, effective three-channel model using leading order chiral SU(3) meson-baryon interactions is also constructed for convenient application in K-nuclear few-body calculations.
AB - 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 Λ(1405) resonance. A simplified, effective three-channel model using leading order chiral SU(3) meson-baryon interactions is also constructed for convenient application in K-nuclear few-body calculations.
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U2 - 10.1016/j.nuclphysa.2012.01.029
DO - 10.1016/j.nuclphysa.2012.01.029
M3 - Article
AN - SCOPUS:84860344418
SN - 0375-9474
VL - 881
SP - 98
EP - 114
JO - Nuclear Physics A
JF - Nuclear Physics A
ER -