The $${\varvec{\Lambda (1405)}}$$ in resummed chiral effective field theory
نویسندگان
چکیده
We study the unitarized meson-baryon scattering amplitude at leading order in strangeness $S=-1$ sector using time-ordered perturbation theory for a manifestly Lorentz-invariant formulation of chiral effective field theory. By solving coupled-channel integral equations with full off-shell dependence potential and applying subtractive renormalization, we analyze renormalized amplitudes obtain two-pole structure $\Lambda(1405)$ resonance. also point out necessity including higher-order terms.
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ژورنال
عنوان ژورنال: European Physical Journal C
سال: 2021
ISSN: ['1434-6044', '1434-6052']
DOI: https://doi.org/10.1140/epjc/s10052-021-09386-0