https://doi.org/10.1051/epjconf/202227107008
Meson-baryon scattering and Λ(1405) in chiral effective field theory
1 Institut für Kernphysik & PRISMA + Cluster of Excellence, Johannes Gutenberg Universität, D-55099 Mainz, Germany
2 Helmholtz Institut Mainz, D-55099 Mainz, Germany
* e-mail: xiulei.ren@uni-mainz.de
Published online: 9 November 2022
We investigated the meson-baryon scattering using time-order perturbation theory (TOPT) based on covariant chiral effective field theory. The effective potential is defined as the sum of two-particle irreducible contributions of time-ordered diagrams, and the renormalized scattering amplitude is obtained by solving the integral equation, which is derived self-consistently in TOPT. Our developed formalism has been successfully applied to the πN scattering at leading order, and it has been extended to the meson-baryon scattering in S = −1 sector and found the two-pole structure of the Λ(1405) resonance.
© The Authors, published by EDP Sciences, 2022
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