TY  - JOUR
AU  - Ren, Xiu-Lei
AU  - Epelbaum, E.
AU  - Gegelia, J.
AU  - Meißner, U.-G.
TI  - The ${\vec{\Lambda (1405)}}$ in resummed chiral effective field theory
JO  - The European physical journal / C
VL  - 81
IS  - 7
SN  - 1434-6044
CY  - Heidelberg
PB  - Springer
M1  - FZJ-2021-04425
SP  - 582
PY  - 2021
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000680861900005
DO  - DOI:10.1140/epjc/s10052-021-09386-0
UR  - https://juser.fz-juelich.de/record/902630
ER  -