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Nuclear Theory·nucl-th

Friday·August 25, 2023

5 papers—2 primary·3 cross-listed

All5Primary2Cross-lists3
  1. 01

    [Submitted on 23 Aug 2023]

    Toward experimental determination of spin entanglement of nucleon pairs

    Dong Bai

    Nuclear entanglement is a flagship in the interdisciplinary direction of nuclear physics and quantum information science. Spin entanglement, a special kind of nuclear entanglement, is ubiquitous in nuclear structures and dynamics. Based on the idea of quantum state tomography, the problem of experimental determination of spin entanglement of two-nucleon pure states is studied directly within the scope of nuclear physics. It is shown that the amount of spin entanglement can be obtained by measuring three spin polarizations of one nucleon in polarization experiments. The errors from imperfect preparation of nucleon pairs are also analyzed. This work not only complements the existing literature of nuclear entanglement but also provides new opportunities for nuclear physics with polarized particles.

    Comments:
    7 pages, 3 figures, published version
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2308.12327 [pdf]
    PRC(2024)·27 citations
  2. 02

    [Submitted on 24 Aug 2023]

    Neutron Scattering off One-Neutron Halo Nuclei in Halo Effective Field Theory

    Xu Zhang🇨🇳 · Hai-Long Fu🇨🇳 · Feng-Kun Guo🇨🇳 · Hans-Werner Hammer🇩🇪

    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 -wave scattering of a neutron and the spin-parity one-neutron halo nuclei , , and at leading order. In the channel, the only inputs to the Faddeev equations are their one-neutron separation energies. In the channel, the neutron-neutron scattering length and the two-neutron separation energies of , and enter as well. The numerical results show that the total -wave cross sections in the channel at threshold are of the order of a few barns. In the channel, these cross sections are of the order of a few barns for - and - scattering, and about 60 for the - scattering. The appearance of a pole in close to zero in all three cases indicates the existence of a virtual Efimov state close to threshold in each of the , , and systems. Observation of this pole would confirm the presence of Efimov physics in halo nuclei. The dependence of the results on the neutron-core scattering length is also studied.

    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    2308.12815 [pdf]
    PRC(2023)·8 citations

Affiliations

first authorsco-authorsvia INSPIRE