PaperPanorama
FAQ

Nuclear Theory·nucl-th

Friday·August 16, 2024

5 papers—3 primary·2 cross-listed

All5Primary3Cross-lists2
  1. 01

    [Submitted on 14 Aug 2024]

    Collective behaviour in proton number fluctuations seen in 2.4 GeV Au+Au collisions

    Ali Bazgir🇵🇱 · Maciej Rybczynski🇵🇱 · Uzair A. Shah🇵🇱 · Zbigniew Wlodarczyk🇵🇱

    At energies of a few GeV per nucleon, nuclear collisions exhibit phenomena more complex than the individualistic nucleon interactions observed at much higher energies. From recent results on proton number fluctuations in Au + Au collisions at ~GeV obtained by the HADES experiment at GSI, we suggest that measuring the multiplicity distributions heavy-ion collisions can be used to probe density fluctuations associated with correlation phenomena. By using the combinant analysis, one can obtain new information contained in them and otherwise unavailable, which may broaden our knowledge of the particle interactions mechanism.

    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    2408.07782 [pdf]
    PLB(2024)·0 citations
  2. 02

    [Submitted on 14 Aug 2024]

    Ab initio computations from Ni towards Ca along neutron number

    B. S. Hu · Z. H. Sun · G. Hagen · G. R. Jansen · T. Papenbrock

    We present coupled-cluster computations of nuclei with neutron number "south" of Ni using nucleon-nucleon and three-nucleon forces from chiral effective field theory. We find an erosion of the magic number toward Ca manifesting itself by an onset of deformation and increased complexity in the ground states. For Ni, we predict a low-lying rotational band consistent with recent data, which up until now has been a challenge for ab initio nuclear models. Ground states are deformed in Fe, Cr, and Ti, although the spherical states are too close in energy to unambiguously identify the shape of the ground state within the uncertainty estimates. In Ca, the potential energy landscape from quadrupole-constrained Hartree-Fock computations flattens, and the deformation becomes less rigid. We also compute the low-lying spectra and values for these neutron-rich nuclei.

    Comments:
    10 pages, 6 figures, supplementary material
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2408.07856 [pdf]
    PLB(2024)·18 citations
  3. 03

    [Submitted on 15 Aug 2024]

    A Complex Scaling Method for Efficient and Accurate Scattering Emulation in Nuclear Reactions

    Junzhe Liu · Jin Lei · Zhongzhou Ren

    We present a novel scattering emulator utilizing the complex scaling method to enhance nuclear reaction analysis. This approach leverages a single set of reduced bases, allowing for efficient and simultaneous emulation across multiple channels and potential parameters, significantly reducing computational storage and accelerating calculations. Demonstrated through \(n\)+\(^{40}\)Ca and \(^{11}\)Be+\(^{64}\)Zn elastic scattering, our method achieves high accuracy and efficiency. This emulator exhibits stable and reliable performance without anomalies inherent in other techniques, showcasing its robustness.

    Comments:
    5 pages, 3 figures, published in Phys. Lett. B 858, 139070(2024)
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2408.07954 [pdf]
    PLB(2024)·14 citations

Affiliations

first authorsco-authorsvia INSPIRE