The $\Lambda(1405)$ in resummed chiral effective field theory
High Energy Physics - Phenomenology
2021-07-21 v1 Nuclear Theory
Abstract
We study the unitarized meson-baryon scattering amplitude at leading order in the strangeness 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 resonance. We also point out the necessity of including higher-order terms.
Cite
@article{arxiv.2102.00914,
title = {The $\Lambda(1405)$ in resummed chiral effective field theory},
author = {X. -L. Ren and E. Epelbaum and J. Gegelia and Ulf-G. Meißner},
journal= {arXiv preprint arXiv:2102.00914},
year = {2021}
}
Comments
16 pages, 3 figures, 5 tables