Properties of dibaryons in nuclear medium

Abstract

Properties of six-quark dibaryons in nuclear medium are considered by 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 ${}^6$Li and ${}^6$He cases.

19 pages, 13 figures

References in corpus (7)

• Chiral effective field theory and nuclear forces
• Probing Cold Dense Nuclear Matter
• Short Range Correlations and the EMC Effect
• ${}^6$He nucleus in halo effective field theory
• Relativity and the low energy nd Ay puzzle
• Momentum distribution and correlation of two-nucleon relative motion in ${}^6$He and ${}^6$Li
• Nature of $\mathbf{S}$-wave $\mathbf{NN}$ interaction and dibaryon production at nucleonic resonance thresholds

Cited by in corpus (1)

• Dibaryon resonances and short-range $NN$ interaction