6533b820fe1ef96bd127aa35
RESEARCH PRODUCT
The $\Lambda(1405)$ in resummed chiral effective field theory
X. -L. RenE. EpelbaumJ. GegeliaUlf-g. Meißnersubject
High Energy Physics - PhenomenologyNuclear TheoryHigh Energy Physics::Phenomenologydescription
We study the unitarized meson-baryon scattering amplitude at leading order in the strangeness $S=-1$ sector using time-ordered perturbation theory for a manifestly Lorentz-invariant formulation of chiral effective field theory. By solving the coupled-channel integral equations with the full off-shell dependence of the effective potential and applying subtractive renormalization, we analyze the renormalized scattering amplitudes and obtain the two-pole structure of the $\Lambda(1405)$ resonance. We also point out the necessity of including higher-order terms.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-02-01 |