%0 Journal Article
%A Ren, Xiu-Lei
%A Epelbaum, E.
%A Gegelia, J.
%A Meißner, U.-G.
%T The ${\vec{\Lambda (1405)}}$ in resummed chiral effective field theory
%J The European physical journal / C
%V 81
%N 7
%@ 1434-6044
%C Heidelberg
%I Springer
%M FZJ-2021-04425
%P 582
%D 2021
%X 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 Λ(1405) resonance. We also point out the necessity of including higher-order terms.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000680861900005
%R 10.1140/epjc/s10052-021-09386-0
%U https://juser.fz-juelich.de/record/902630