Chiral EFT with lattice-fitted LECs and unitarization predicts resonance, virtual, and bound states plus scattering parameters for doubly charmed baryon-meson systems at physical quark masses.
The $\kappa$ resonance in s wave $\pi K$ scatterings
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abstract
A new unitarization approach incorporated with chiral symmetry is established and applied to study the $\pi K$ elastic scatterings. We demonstrate that the $\kappa$ resonance exists, if the scattering length parameter in the I=1/2, J=0 channel does not deviate much from its value predicted by chiral perturbation theory. The mass and width of the $\kappa$ resonance is found to be $M_\kappa=594\pm 79MeV$, $\Gamma_\kappa=724\pm 332MeV$, obtained by fitting the LASS data up to 1430MeV. Better determination to the pole parameters is possible if the chiral predictions on scattering lengths are taken into account.
years
2026 2verdicts
UNVERDICTED 2representative citing papers
Lattice QCD yields the K*(892) resonance pole at physical pion mass and continuum limit as 883(22) - i20(13) MeV, in agreement with experiment.
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Doubly charmed baryon-light meson scattering in chiral effective theory with lattice constraints
Chiral EFT with lattice-fitted LECs and unitarization predicts resonance, virtual, and bound states plus scattering parameters for doubly charmed baryon-meson systems at physical quark masses.
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Lattice QCD study of the $K^*(892)$ resonance at the physical point
Lattice QCD yields the K*(892) resonance pole at physical pion mass and continuum limit as 883(22) - i20(13) MeV, in agreement with experiment.