TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysProc.3.008
TI  - Low-energy neutron scattering on light nuclei and $^{19}$B as a $^{17}$B-$n$-$n$ three-body system in the unitary limit
PY  - 2020/02/24
UR  - https://scipost.org/SciPostPhysProc.3.008
JF  - SciPost Physics Proceedings
JA  - SciPost Phys. Proc.
VL  - 
IS  - 3
SP  - 008
A1  - Carbonell, Jaume
AU  - Hiyama, Emiko
AU  - Lazauskas, Rimantas
AU  - Marqués, Francisco Miguel
AB  - We consider the evolution of the neutron-nucleus scattering length for the lightest nuclei. We show that, when increasing the number of neutrons in the target nucleus, the strong Pauli repulsion is weakened and the balance with the attractive nucleon-nucleon interaction results into a resonant virtual state in $^{18}$B. We describe $^{19}$B in terms of a $^{17}$B-$n$-$n$ three-body system where the two-body subsystems $^{17}$B-$n$ and $n$-$n$ are unbound (virtual) states close to the unitary limit. The energy of $^{19}$B ground state is well reproduced and two low-lying resonances are predicted. Their eventual link with the Efimov physics is discussed. This model can be extended to describe the recently discovered resonant states in $^{20,21}$B.
ER  -

@Article{10.21468/SciPostPhysProc.3.008,
	title={{Low-energy neutron scattering on light nuclei and $^{19}$B as a $^{17}$B-$n$-$n$ three-body system in the unitary limit}},
	author={Jaume Carbonell and Emiko Hiyama and Rimantas Lazauskas and F. Miguel Marqués},
	journal={SciPost Phys. Proc.},
	pages={008},
	year={2020},
	publisher={SciPost},
	doi={10.21468/SciPostPhysProc.3.008},
	url={https://scipost.org/10.21468/SciPostPhysProc.3.008},
}