https://doi.org/10.1140/epja/s10050-020-00236-3
Regular Article –Theoretical Physics
Nature of 
-wave 
interaction and dibaryon production at nucleonic resonance thresholds
1
Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Leninskie Gory 1/2, 119991, Moscow, Russia
2
Physics Institute and Kepler Center for Astro and Particle Physics, Eberhard-Karls-University Tübingen, Auf der Morgenstelle 14, 72076, Tübingen, Germany
* e-mail: pomeran@nucl-th.sinp.msu.ru
Received:
28
June
2020
Accepted:
25
August
2020
Published online:
11
September
2020
Phase shifts and inelasticity parameters for NN scattering in the partial-wave channels 
–
and 
at energies 
from zero to about 1 GeV are described within a unified NN potential model assuming the formation of isoscalar and isovector dibaryon resonances near the 
threshold. Evidence for these near-threshold resonances is actually found in the recent WASA experiments on single- and double-pion production in NN collisions. There, the excitation of the Roper resonance 
exhibits a structure in the energy dependence of the total cross section which corresponds to the formation of dibaryon states with 
and 
at the threshold. These two S-wave dibaryon resonances may provide new insight into the nature of the strong NN interaction at low and intermediate energies.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2020
