Speaker
Description
In an effort to contribute towards a better understanding of the dynamics of three-body weakly-bound systems, we present a detailed analysis of the role of nucleon-nucleon ($nn$) and three-body interactions on the three-body ground-state structure, considering the $^{22}{\rm C}\to{}^{20}{\rm C}+n+n$ system. It is found that even in the absence of the $nn$ interaction, this system remains bound, provided a more attractive three-body interaction is considered. Similarly, for this system to remain bound in the absence of the three-body interaction, we found that a more attractive $nn$ is required. Analyzing the ground-state binding energy as a function of the range $\rho_0$ of the three-body interaction, it is shown that when the $nn$ interaction is included, the system is only bound for $\rho_0\ge R_c$ ($R_c$ being the matter radius of the core nucleus). When the $nn$ interaction is removed, the system is only bound for $\rho_0\ge 2R_c$. We then argue that the range $\rho_0$ could be another crucial parameter that may reveal how far the two halo neutrons are from the core nucleus.
In conclusion, we believe that these results provide a clear picture of the interplay of the $nn$ and three-body interactions and their crucial role in a three-body weakly-bound system.
Level for award;(Hons, MSc, PhD, N/A)?
MSc
| Apply to be considered for a student ; award (Yes / No)? | Yes |
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