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Nuclear Theory·nucl-th

Tuesday·January 30, 2024

12 papers—5 primary·7 cross-listed

All12Primary5Cross-lists7
  1. 01

    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 .

    nucl-thcond-mat.quant-gasphysics.atm-clusphysics.atom-ph+1Few Body Syst.(2024)·0 citations
  3. 03

    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.

    nucl-thnucl-exEPJ Web Conf.(2024)·1 citation
  4. 04

    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.

    nucl-thnucl-exPRC(2024)·45 citations
  5. 05

    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).

    nucl-thPRC(2024)·11 citations

Affiliations

first authorsco-authorsvia INSPIRE