26-31 July 2021
Mexico City
Mexico/General timezone
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Contribution Parallel

Mexico City -
Baryon Spectroscopy

Meson-baryon scattering and Lambda(1405) in resummed baryon chiral perturbation theory


  • Dr. Xiu-Lei REN

Primary authors



We investigated the meson-baryon scattering using time-order perturbation theory (TOPT) based on covariant baryon ChPT. Renormalized scattering amplitudes are obtained by solving the integral equations with the full off-shell dependence of effective potentials and applying subtractive renormalization. Our formalism has been successfully applied to the pion-nucleon scattering and extended to the meson-baryon scattering in the S=-1 sector. We obtained the two-pole structure of Lambda(1405) state.