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@ARTICLE{Haidenbauer:897208,
author = {Haidenbauer, Johann and Meißner, Ulf-G.},
title = {{O}n the structure in the Λ{N} cross section at the Σ{N}
threshold},
journal = {Chinese physics / C},
volume = {45},
number = {9},
issn = {2058-6132},
address = {Bristol [u.a.]},
publisher = {IOP Publ.},
reportid = {FZJ-2021-03674},
pages = {094104 -},
year = {2021},
abstract = {The complexity of threshold phenomena is exemplified on a
prominent and long-known case - the structure in the
$\Lambda p$ cross section (invariant mass spectrum) at the
opening of the $\Sigma N$ channel. The mass splitting
between the $\Sigma$ baryons together with the angular
momentum coupling in the $^3S_1$- $^3D_1$ partial wave imply
that, in principle, up to six channels are involved.
Utilizing hyperon-nucleon potentials that provide an
excellent description of the available low-energy $\Lambda
p$ and $\Sigma N$ scattering data, the shape of the
resulting $\Lambda p$ cross section is discussed and the
poles near the $\Sigma N$ threshold are determined. Evidence
for a strangeness $S=-1$ dibaryon is provided, in the form
of a (unstable) $\Sigma N$ bound state in the vicinity of
the $\Sigma N$ threshold. Predictions for level shifts and
widths of $\Sigma^-p$ atomic states are given.},
cin = {IAS-4 / IKP-3},
ddc = {530},
cid = {I:(DE-Juel1)IAS-4-20090406 / I:(DE-Juel1)IKP-3-20111104},
pnm = {5111 - Domain-Specific Simulation Data Life Cycle Labs
(SDLs) and Research Groups (POF4-511) / DFG project
196253076 - TRR 110: Symmetrien und Strukturbildung in der
Quantenchromodynamik (196253076)},
pid = {G:(DE-HGF)POF4-5111 / G:(GEPRIS)196253076},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000692007400001},
doi = {10.1088/1674-1137/ac0e89},
url = {https://juser.fz-juelich.de/record/897208},
}