TY  - JOUR
AU  - Ren, X.-L.
AU  - Epelbaum, E.
AU  - Gegelia, J.
AU  - Meißner, Ulf-G.
TI  - Meson–baryon scattering in resummed baryon chiral perturbation theory using time-ordered perturbation theory
JO  - The European physical journal / C
VL  - 80
IS  - 5
SN  - 1434-6052
CY  - Heidelberg
PB  - Springer
M1  - FZJ-2021-00157
SP  - 406
PY  - 2020
AB  - Integral equations for meson–baryon scattering amplitudes are obtained by utilizing time-ordered perturbation theory for a manifestly Lorentz-invariant formulation of baryon chiral perturbation theory. Effective potentials are defined as sums of two-particle irreducible contributions of time-ordered diagrams and the scattering amplitudes are obtained as solutions of integral equations. Ultraviolet renormalizability is achieved by solving integral equations for the leading order amplitude and including higher order corrections perturbatively. As an application of the developed formalism, pion-nucleon scattering is considered.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000535820900002
DO  - DOI:10.1140/epjc/s10052-020-7991-x
UR  - https://juser.fz-juelich.de/record/889252
ER  -