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Nuclear Theory·nucl-th

Wednesday·February 11, 2026

7 papers—5 primary·2 cross-listed

All7Primary5Cross-lists2
  1. 01

    Mean-field proton-neutron pairing correlations with the Gogny D1S energy density functional

    Miguel de la Fuente🇪🇸 · Tomás R. Rodríguez🇪🇸 · Luis M. Robledo🇪🇸 · Benjamin Bally🇩🇪 · Nathalie Pillet🇫🇷

    We study proton-neutron pairing correlations within the Hartree-Fock-Bogoliubov (HFB) framework using Gogny-type energy density functionals. By allowing for proton-neutron mixing in the quasi-particle transformation, both isovector () and isoscalar () pairing channels are explicitly included at the mean-field level. The \texttt{TAURUS} code has been extended to treat density-dependent Gogny interactions in this generalized HFB scheme. We examine the numerical behavior of the widely used Gogny D1S functional and compare it with calculations performed using the Hamiltonian-based Brink-Boecker B1 interaction supplemented by a zero-range spin-orbit term. When proton-neutron mixing is included and large single-particle spaces are employed, instabilities are observed for Gogny D1S due to the zero-range density-dependent term contribution to the proton-neutron pairing field, whereas stable solutions are obtained with the B1 interaction. Constrained HFB calculations performed in reduced configuration spaces allow us to explore total energy curves as functions of proton-neutron pairing collective coordinates in selected -shell nuclei. In all cases studied, the self-consistent minima correspond to vanishing proton-neutron pairing, with energy increasing rapidly as proton-neutron pairing correlations are introduced. These results provide insight into the behavior of Gogny functionals under generalized HFB conditions and offer useful guidance for future developments.

    nucl-th0 citations
  2. 02

    Three-Body Barrier Dynamics of Double-Alpha Decay in Heavy Nuclei

    Shulin Tang · Tao Wan · Yibin Qian · Chong Qi · Ramon A. Wyss · Roberto J. Liotta · Dong Bai · Bo Zhou · Zhongzhou Ren

    The simultaneous emission of two particles--double- decay--represents a long-predicted but unobserved mode of nuclear radioactivity. Here we formulate this process as a genuine three-body problem within the hyperspherical coordinate framework and evaluate decay probabilities by numerically solving the corresponding hyperradial Schrödinger equation, combined with large-scale random sampling of the potential parameters; the latter treatment ensures that the present results are more convincing. Inspired by this, we demonstrate that the penetrability ratio between simultaneous and sequential emission exhibits a strikingly linear dependence on , extending the barrier penetration dynamics into the correlated few-body regime. The nuclei Xe, Ra, Pu, U, Rn, and Th are suggested as the most promising candidates for the observation of double- decay, with predicted half-lives potentially accessible within present detection limits. Our results provide a unified framework for multi- decay and open a pathway to probing nuclear clustering and few-body correlations in heavy nuclei.

    nucl-thastro-ph.SRnucl-exPRL(2026)·1 citation
  3. 03

    Hypernuclear constraints on and interactions

    Eliahu Friedman🇮🇱 · Avraham Gal🇮🇱

    Recent work on using density dependent -nuclear optical potentials in calculations of -hypernuclear binding energies is reviewed. It is found that all known binding energies in the mass range are well fitted in terms of two interaction parameters: one, attractive, for the spin-averaged interaction and another one, repulsive, for the interaction. The interaction term by itself overbinds hypernuclei, in quantitative agreement with recent findings obtained in EFT and Femtoscopy studies. The strength of the interaction term is compatible with values required to resolve the hyperon puzzle.

    nucl-thhep-phnucl-exActa Phys.Polon.B(2026)·5 citations
  4. 04

    Imaging two-body correlations in atomic nuclei via low- and high-energy processes

    Stavros Bofos🇫🇷 · Benjamin Bally🇩🇪 · Thomas Duguet🇫🇷 · Mikael Frosini🇫🇷

    Characterizing the correlated behavior of nucleons inside atomic nuclei constitutes a long-standing challenge, both experimentally and theoretically. It has recently been understood that two-particle correlations in the azimuthal distribution of final hadrons emitted in ultra-relativistic ultra-central ion-ion collisions can be used to quantify ground-state two-body correlations. Performing systematic ab initio nuclear structure calculations of light nuclei, we demonstrate that such an observable does provide a meaningful imaging of nuclear ground states, naturally leading to a robust interpretation of the various categories of two-nucleon correlations at play. This is at variance with the low-energy approach relying on Kumar operators whose traditional interpretation in terms of deformation parameters is shown to be inoperative. A future interesting development will consist of targeting specific three-particle correlations to isolate three-nucleon correlations in which additional nuclear structure information of interest leave their fingerprint.

    nucl-thhep-phnucl-exPLB(2026)·7 citations
  5. 05

    Liquid-gas phase transition of nuclear matter

    Norbert Kaiser🇩🇪 · Wolfram Weise🇩🇪

    A survey is presented summarizing the empirical evidence for and interpretations of a first-order liquid-gas phase transition in nuclear matter. Earlier developments and the present state of knowledge about the extraction of the critical point for such a transition, primarily from the systematics of multifragmention data, are outlined. By analogy with a Van der Waals equation of state, the empirically deduced critical temperature and pressure permit to draw a schematic picture of the underlying nuclear potential. More detailed approaches to the liquid-gas transition using self-consistent nuclear Hartree-Fock and variational calculations are described. Critical exponents are reported. Then chiral effective field theory, as the low-energy realization of QCD, is discussed in the context of nuclear thermodynamics. Its implications for the liquid-gas transition in symmetric nuclear matter as well as in neutron-rich matter are reviewed.

    nucl-thnucl-ex3 citations

Affiliations

first authorsco-authorsvia INSPIRE