https://doi.org/10.1140/epja/s10050-020-00272-z
Regular Article - Theoretical Physics
Properties of dibaryons in nuclear medium
1
Laboratory of Information Technologies, Joint Institute for Nuclear Research, 6 Joliot-Curie, Dubna, Moscow Region, 141980, Russia
2
Institute of Nuclear Physics, 1 Ibragimova Street, 050032, Almaty, Kazakhstan
3
Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 1(2) Leninskie Gory, Moscow, 119991, Russia
4
L.N.Gumilyov Eurasian National University, 2 Satpaev Str, 010008, Nur-Sultan, Kazakhstan
* e-mail: pomeran@nucl-th.sinp.msu.ru
Received:
20
May
2020
Accepted:
7
October
2020
Published online:
20
October
2020
Properties of six-quark dibaryons in a nuclear medium are considered by the example of $$A=6$$ nuclei within the three-cluster $$\alpha +2N$$ model. Dibaryon production in nuclei leads to the appearance of a three-body force between the dibaryon and nuclear core. This non-conventional scalar force is shown to provide an additional attractive contribution to the three-body binding energy. This three-body contribution improves noticeably agreement between theoretical results and experimental data for the majority of observables. The most serious difference between the traditional NN-force models and the dibaryon-induced model is found for the nucleon momentum distribution, the latter model providing a strong enrichment of the high-momentum components, both for the $$^6$$Li and the $$^6$$He cases.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2020
