The neutron dripline in calcium isotopes from a chiral interaction
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arXiv
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| Format: | Preprint |
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2025
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| author | Hu, B. S. Ekström, A. Forssén, C. Hagen, G. Jiang, W. G. Miyagi, T. Papenbrock, T. |
| author_facet | Hu, B. S. Ekström, A. Forssén, C. Hagen, G. Jiang, W. G. Miyagi, T. Papenbrock, T. |
| contents | Interactions derived from effective field theories of quantum chromodynamics have thus far failed to bind calcium nuclei beyond neutron number $N=40$, while nuclear density functionals typically place the neutron dripline near $^{70}$Ca, at $N=50$. We present the chiral interaction N$^3$LO$_{\rm Texas}$, a combination of two- and three-nucleon potentials at fourth and third chiral order, respectively, with low-energy constants optimized using emulator-accelerated fits to few- and many-body data. This interaction accurately reproduces binding energies and charge radii of key nuclei with mass number $A=3$ to $208$, important excited states, and nuclear matter near saturation. Using ab-initio methods, we find that the calcium two-neutron dripline extends to $^{71}$Ca. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_11723 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The neutron dripline in calcium isotopes from a chiral interaction Hu, B. S. Ekström, A. Forssén, C. Hagen, G. Jiang, W. G. Miyagi, T. Papenbrock, T. Nuclear Theory Interactions derived from effective field theories of quantum chromodynamics have thus far failed to bind calcium nuclei beyond neutron number $N=40$, while nuclear density functionals typically place the neutron dripline near $^{70}$Ca, at $N=50$. We present the chiral interaction N$^3$LO$_{\rm Texas}$, a combination of two- and three-nucleon potentials at fourth and third chiral order, respectively, with low-energy constants optimized using emulator-accelerated fits to few- and many-body data. This interaction accurately reproduces binding energies and charge radii of key nuclei with mass number $A=3$ to $208$, important excited states, and nuclear matter near saturation. Using ab-initio methods, we find that the calcium two-neutron dripline extends to $^{71}$Ca. |
| title | The neutron dripline in calcium isotopes from a chiral interaction |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2512.11723 |