Properties of dibaryons in nuclear medium

TL;DR

This paper investigates how dibaryons influence nuclear properties in $A=6$ nuclei, revealing that dibaryon-induced forces enhance binding energy calculations and significantly enrich high-momentum components in nucleon distributions.

Contribution

It introduces a dibaryon-induced three-body force in nuclear models, improving agreement with experimental data and highlighting its impact on high-momentum nucleon components.

Findings

Dibaryon production adds an attractive three-body force.

Enhanced high-momentum components in nucleon distributions.

Better agreement with experimental data for nuclear observables.

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.