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Nuclear Theory·nucl-th

Tuesday·January 30, 2024

12 papers—5 primary·7 cross-listed

All12Primary5Cross-lists7
  1. 01

    [Submitted on 27 Jan 2024]

    Universality for Three Bosons with Large, Negative Effective Range: Aspects and Addenda

    Harald W. Griesshammer (George Washington U.)

    Resummed-Range Effective Field Theory is the consistent non-relativistic Effective Field Theory of point interactions in systems with large two-body scattering length and an effective range large in magnitude but negative. Its leading order is non-perturbative, and its observables depend only on the dimensionless ratio once is chosen as base unit. This presentation highlights aspects for three identical spinless bosons and adds details to a previous discussion [1]. At leading order, no three-body interaction is needed. A ground state exists only in the range , and excited states display self-similarity and Discrete Scale Invariance, with small corrections for nonzero .

    Comments:
    10 pages LaTeX2e (pdflatex) including 6 figures as 7 .pdf files using includegraphics and sn-jnl class. Contribution to the Proceedings of the 25th European Conference of Few-Body Physics, Mainz, 30 July - 4 August 2023. Typographical updates only
    Subjects:
    Nuclear Theory (nucl-th); Quantum Gases (cond-mat.quant-gas); physics.atm-clus (physics.atm-clus); Atomic Physics (physics.atom-ph); Quantum Physics (quant-ph)
    arXiv:
    2401.15402 [pdf]
    Few Body Syst.(2024)·0 citations
  2. 02

    [Submitted on 28 Jan 2024]

    Global polarization and spin alignment in heavy-ion collisions: past, present and future

    Wen-Bo Dong🇨🇳 · Xin-Li Sheng🇮🇹 · Yi-Liang Yin🇨🇳 · Qun Wang🇨🇳

    We give a brief overview on global polarization and spin alignment in heavy ion collisions. The current theoretical understandings on global polarization of hyperons and the global spin alignment of vector mesons are summarized.

    Comments:
    10 pages, 2 figures, Proceeding for SPIN 2023
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2401.15576 [pdf]
    PoS(2024)·5 citations
  3. 03

    [Submitted on 28 Jan 2024]

    Using the Transition-Density Formalism in the First Computation of 4He Compton Scattering

    Harald W. Griesshammer (George Washington U.) · Junjie Liao (George Washington U.) · Judith A. McGovern (U. of Manchester) · Andreas Nogga (FZ Jülich) · Daniel R. Phillips (Ohio U.)

    The method and results of the first theory description of 4He Compton scattering at nuclear energies is presented, with a focus on figures. An upcoming publication [1] contains details and a comprehensive list of references.

    Comments:
    6 pages LaTeX2e (pdflatex) including 4 figures as 6 .pdf files using includegraphics and webofc class. Contribution to the Proceedings of the 16th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU 2023), Mainz 16-20 October 2023
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2401.15673 [pdf]
    EPJ Web Conf.(2024)·1 citation
  4. 04

    [Submitted on 28 Jan 2024]

    Exploring the compactness of cluster in O nuclei with relativistic O+O collisions

    Yuanyuan Wang · Shujun Zhao · Boxing Cao · Hao-jie Xu · Huichao Song

    Probing the cluster of O with the relativistic O+O collisions has raised great interest in the heavy ion community. However, the effects of the cluster on the soft hadron observables vary largely among different studies. In this paper, we explain the differences by the compactness of the cluster in oxygen, using iEBE-VISHNU hydrodynamic simulations with different initial state cluster configurations. We also find several observables, such as the intensive skewness of the correlator , the harmonic flows , , , and the correlations , in O+O collisions are sensitive to the compactness of the cluster in the colliding nuclei, which can be used to constrain the configurations of O in the future. Our study serves as an important step toward the quantitative exploration of the cluster configuration in the light nuclei with relativistic heavy ion collisions.

    Comments:
    9 pages, 9 figures, published version + appendix (initial state calculations)
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2401.15723 [pdf]
    PRC(2024)·45 citations
  5. 05

    [Submitted on 29 Jan 2024]

    New Skyrme parametrizations to describe finite nuclei and neutron star matter with realistic effective masses

    Mingya Duan🇫🇷 · Michael Urban🇫🇷

    The phenomenological Skyrme energy density functional theory is one of the most popular theories for dealing with finite nuclei and infinite nuclear matter, including neutron star matter. However, the density dependence of the effective masses of common Skyrme parametrizations is completely different from the one found in microscopic calculations. This can have drastic consequences. For instance, in a recent study we reported that in many Skyrme functionals, the neutron Fermi velocity exceeds the speed of light at densities that exist in neutron-star cores. To solve this problem, we try to construct new Skyrme parametrizations by including constraints from microscopic calculations of the effective mass in addition to binding energies and charge radii of finite nuclei and different microscopic equations of state of pure neutron matter. We give the parameters of the new Skyrme forces and show that our new effective interactions can successfully describe properties of finite nuclei and nuclear matter (including pure neutron matter, symmetric nuclear matter, and neutron star matter).

    Comments:
    21 pages (including 12 figures, 8 tables, and appendix). v2: major changes; v3: equations (A2) and (A5) corrected and minor other changes
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2401.15916 [pdf]
    PRC(2024)·11 citations

Affiliations

first authorsco-authorsvia INSPIRE