The 23rd International Conference on Few-Body Problems in Physics (FB23)

Halo nuclei are interesting nuclear systems at the edge of stability. In an EFT treatment (halo EFT) they can be described as a more tightly bound core plus the more loosely bound halo nucleons. The so-called two-neutron ($2n$) halo nuclei consisting of the core and two halo neutrons are a special class within the halo nuclei. Prominent examples are $^6$He and $^{11}$Li. In the EFT description...

Recent experimental measurements of the breakup of $^8{\rm B}$ proton-halo nucleus on a lead target at deep sub-barrier energies by Pakou et al.[1] and Yang et al.[2], have shown that the breakup channel is the main reaction channel at these energies. Further, these works indicated the effect of Coulomb polarization on the proton halo state, with the correlation information revealing that the...

Neutron scattering off neutron halos can provide important information about the internal structure of nuclei close to the neutron drip line. In this work, we use halo effective field theory to study the $s$-wave scattering of a neutron and the spin-parity $J^P=\frac{1}{2}^+$ one-neutron halo nuclei $^{11}\rm Be$, $^{15}\rm C$, and $^{19}\rm C$ at leading order. In the $J=1$ channel, the only...

The peculiar thermal relaxation property of neutron stars is characterized by significantly prolonged thermal relaxation time. By combining neutron star cooling simulations, we propose a simple analytical model to explain the peculiar thermal relaxation. We find that the introduction of neutron $^3P_2$ superfluidity and the dUrca process lead to these peculiar thermal relaxations. The former...

In cluster models, the light nuclei are treated as few-body systems composed of alpha-clusters and valence nucleons, providing significant successful description for the states with well developed clustering structure. However, the shell-like states with melted alpha clusters is more general in low lying states, and the cluster breaking effect becomes significant above the 3N+N threshold. In...

Experimental exploration of neutron dripline is very challenging, and neon is the heaviest nucleus measured neutron dripline experimentally. Prediction of dripline heavier nuclei than neon is currently depends on theoretical approaches. However, there exist strong model-dependence in the prediction of the dripline in theoretical approach. Nuclear Lattice Effective Field Theory is one of the ab...

Accessing continuum information in nuclear physics is challenging, especially in an ab initio setup. We present recent progress on this topic using finite-volume dependences. Finite-volume dependencies in nuclear physics are well-established analytical tools for numerical simulations. They reveal real-world properties from discrete energy levels in artificial finite boxes. In this talk, I...

The nuclear reaction $^6$He+p was investigated at 8 MeV/u. $^6$He is a halo nucleus, and it has a three-body $\alpha$+n+n structure. It is the lightest halo nucleus and is bound by about 1 MeV against the $\alpha$+n+n breakup. Moreover, there is no core excitation in $^6$He and the interactions between the $^6$He constituents (i.e. the alpha particle and the neutrons) with the target (proton)...

The dynamics of the three-nucleon system can be extensively studied in the deuteron-proton (dp) breakup reaction. Experimental studies of the dp system allow for the observation of effects of various dynamical components, such as three-nucleon force (3NF) and Coulomb force. Measurements of cross sections as well as polarized observables (e.g. vector and tensor analyzing powers [1]) allow...

Structure and correlations of nuclei at and beyond the neutron drip line have attracted lots of attention in the last decades. Strongly correlated neutrons may also form neutron clusters (e.g., 3n, 4n). Despite many experimental and theoretical efforts, the properties of these neutron clusters still remain elusive. To study the structure of the extremely neutron-rich nuclei and the...

The structure of neutron-rich nuclei in the neutron-drip-line region is one of the frontiers of nuclear physics. By directly detecting the neutrons emitted during their decay, the structure and multi-neutron correlations of the nucleus can be investigated, which is not only important for advancing our understanding of the structure and interactions of the finite nuclei, but also helps to gain...

We use the continuum discretized coupled channel method to investigate the breakups of 6Li and 7Li on different target masses when the continuum resonant states are included and excluded in the coupling matrix elements. Our intention is to study the dynamic differences and/or similarities due to their different properties, other than the ground-state binding energy. To this end, keeping the...

Nuclear clustering is a fascinating phenomenon in nuclear physics, characterized by the Hoyle state in $^{12}$C, which is crucial for carbon production in the universe via the triple-alpha process. This state features a three-body structure of alpha clusters that form a quasi-Bose-Einstein condensate through weak correlations. Clustering is widely present in light nuclei, particularly in...