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Nuclear Theory·nucl-th

Thursday·April 16, 2026

9 papers—2 primary·7 cross-listed

All9Primary2Cross-lists7
  1. 01

    [Submitted on 15 Apr 2026]

    Scattering lengths beyond the nuclear scale and the Efimov effect

    F. Miguel Marqués🇫🇷

    The interaction of neutrons and nuclei at low energies may potentially lead to scattering lengths several orders of magnitude larger than the effective range of the interaction, well beyond the nuclear scale. If such cases existed, they could lead to the observation of the Efimov effect in nuclei, a remarkable universal phenomenon that has been observed only in atoms. The interaction parameters of neutrons scattering off unstable nuclei can be explored in neutron-nucleus systems created after the fast removal of a few nucleons from a slightly heavier beam. The case of the B- system is considered, and the implications of its potentially huge scattering length on the structure of B as a B-- Efimov trimer are discussed.

    Comments:
    Invited talk at the XLVII Symposium on Nuclear Physics, Cocoyoc (Mexico), January 2026
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2604.13755 [pdf]
    0 citations
  2. 02

    [Submitted on 15 Apr 2026]

    Non-Gaussian fluctuations in relativistic hydrodynamics: Confluent equations for three-point correlations

    Xin An · Gokce Basar · Mikhail Stephanov

    We derive deterministic equations for the evolution of non-Gaussian fluctuations in relativistic stochastic hydrodynamics. This is achieved by defining the average local Landau frame and corresponding fluctuating hydrodynamic variables. Fully nonlinear stochastic hydrodynamics is expressed in a unified multi-component matrix form. A novel relativistic formalism, also manifestly covariant under SO(3) rotations of the local spatial basis in the average local Landau frame, is introduced. The equations describe correlators of all hydrodynamic variables, including fluctuating velocity (or momentum density) -- a nontrivial problem in relativistic hydrodynamics.

    Comments:
    38 pages, 2 figures
    Subjects:
    Nuclear Theory (nucl-th); Statistical Mechanics (cond-mat.stat-mech); High Energy Physics — Theory (hep-th)
    arXiv:
    2604.14110 [pdf]
    3 citations

Affiliations

first authorsco-authorsvia INSPIRE