Nuclear Theory·nucl-th

Tuesday·October 21, 2025

14 papers—9 primary·5 cross-listed

01
[Submitted on 17 Oct 2025]
Born series for s-wave scattering length and some exact results
N. Kaiser
In these notes the Born series for the $s$ -wave scattering $a_{0}$ is calculated for a class of central potentials $V (r)$ up to sixth order in a dimensionless coupling strength $g$ . Examples of exponentially decaying potentials as well truncated potentials involving a single length-scale $a$ are considered. In certain favorable cases the exact result for the $g$ -dependent $s$ -wave scattering length $a_{0} = A_{0} (g) a$ can be given in terms of special functions. The poles of $A_{0} (g)$ at increasing positive values of $g$ correspond to the thresholds, where $s$ -wave bound-states occur successively. A scattering problem, where $A_{0} (g)$ is solvable in terms of elementary functions, is also presented.
Comments:
14 pages, 12 figures
Subjects:
Nuclear Theory (nucl-th); Quantum Physics (quant-ph)
arXiv:
2510.16212 [pdf]
Axioms(2026)·0 citations
02
[Submitted on 18 Oct 2025]
D-meson production via sequential hadronization in high-energy nuclear collisions
Zi-Xuan Xu🇨🇳 · Wei Dai🇨🇳 · Ben-Wei Zhang🇨🇳 · Jiaxing Zhao🇩🇪 · Pengfei Zhuang🇨🇳
Heavy flavor production serves as an ideal probe of the hadronization mechanism of the quark-gluon plasma created in relativistic heavy ion collisions. We study charm-quark hadronization using Langevin transport in the medium together with a sequential coalescence model. Since $D_{s}$ forms earlier than $D^{0}$ , as obtained from the Dirac equation with an in-medium potential extracted from lattice QCD, the $D_{s}$ elliptic flow $v_{2}$ is smaller than the $D^{0}$ $v_{2}$ in the intermediate- $p_{T}$ region, in good agreement with the recent ALICE data. Incorporating sequential coalescence, charm-quark number conservation, and strangeness enhancement predicts a peak in the yield ratio $D_{s} / D^{0}$ at low $p_{T}$ , which can be tested in future heavy-ion collisions.
Comments:
6 pages, 5 figures, version published in PHYSICAL REVIEW LETTERS 136, 232301 (2026)
Subjects:
Nuclear Theory (nucl-th)
arXiv:
2510.16299 [pdf]
PRL(2026)·4 citations
03
[Submitted on 18 Oct 2025]
Symmetry restoration in the axially deformed proton-neutron quasiparticle random phase approximation for nuclear beta decay: The effect of angular-momentum projection
R. N. Chen🇨🇳 · Y. N. Zhang🇨🇳 · J. M. Yao🇨🇳 · J. Engel🇺🇸
We examine the effects of symmetry restoration on nuclear beta decay within the axially deformed proton-neutron quasiparticle random phase approximation (QRPA). We employ the proton-neutron finite-amplitude method (pnFAM) to compute transition amplitudes, and perform angular-momentum projection both after variation and after the QRPA to restore rotational symmetry. Exact projection reduces the calculated beta decay half-lives from those that use the needle approximation by up to 60%, and even more when taking the effects of projection on the ground-state energy into account.
Comments:
14 pages with 10 figures, version to be published in PRC
Subjects:
Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
arXiv:
2510.16313 [pdf]
PRC(2026)·1 citation
04
[Submitted on 18 Oct 2025]
Microscopic triaxial quadrupole-octupole collective Hamiltonian for low-energy nuclear excitations
J. Xiang🇨🇳 · J. Zhao🇨🇳 · Z. P. Li🇨🇳 · D. Vretenar🇭🇷
We present a microscopic triaxial quadrupole-octupole collective Hamiltonian (TQOCH) that unifies collective rotations, quadrupole-octupole vibrations, and their couplings to model low-lying nuclear states of both parities. The TQOCH's dynamics are governed by collective parameters derived from multidimensionally constrained covariant density functional theory. The model's validity is demonstrated through calculations of $^{152}$ Sm, including its deformation energy surfaces, excitation spectra, and transition probabilities. As a predictive tool, the TQOCH probes complex nuclear phenomena like shape coexistence and phase transitions, directly connecting their microscopic origins to spectroscopic observables.
Comments:
16page, 6 figures
Subjects:
Nuclear Theory (nucl-th)
arXiv:
2510.16453 [pdf]
PRC(2026)·2 citations
05
[Submitted on 18 Oct 2025]
Short-Range Correlations and Transverse Response Enhancement from Meson-Exchange Currents
P.R. Casale🇪🇸 · J.E. Amaro🇪🇸
We investigate the role of short-range correlations (SRC) in the transverse nuclear response within the quasielastic peak region, focusing on the 1p1h channel. The calculation is performed in nuclear matter by solving the Bethe-Goldstone equation with the realistic Granada 2013 nucleon-nucleon potential, including both one-body and two-body meson-exchange currents (MEC) of seagull, pion-in-flight, and $Δ$ types. We find that MEC produce a sizable enhancement of the transverse response in the 1p1h channel when acting on correlated nucleon pairs with high-momentum components generated by SRC. This contrasts with the uncorrelated case, where MEC, dominated by the $Δ$ current, can even yield a negative effect. The results are consistent with previous findings based on the correlated basis function approach, supporting the interpretation that SRC play a central role in the transverse response enhancement from MEC.
Comments:
12 pages, 5 figures
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
arXiv:
2510.16578 [pdf]
J.Phys.G(2025)·2 citations
06
[Submitted on 19 Oct 2025]
Probing the shape evolution and shell structures in neutron-rich N=50 nuclei
Anil Kumar · Noritaka Shimizu · Takayuki Miyagi · Yusuke Tsunoda · Yutaka Utsuno
The structure of low-lying states of $N = 50$ nuclei is investigated by the advanced Monte Carlo shell model (MCSM) in the $π (f p)$ - $ν (s d g)$ model space. We have employed the shell-model Hamiltonian based on the valence-space in-medium similarity renormalization group, with minimal phenomenological adjustments to the single-particle energies. The MCSM results with the modified Hamiltonian nicely predict the shape coexistence of $^{78}$ Ni, consistent with recent experimental data. The evolution of intrinsic shapes from the spherical shape to prolate shapes in the ground state of $N = 50$ nuclei is discussed using the "T-plot" and effective single-particle energies, which visualize the intrinsic quadrupole deformation of the MCSM wave function. The present result shows that the monopole part of the tensor force does not enhance the shape coexistence of $^{78}$ Ni, unlike the case of $^{68}$ Ni.
Comments:
9 pages, 5 Figures
Subjects:
Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
arXiv:
2510.16775 [pdf]
PLB(2026)·2 citations
07
[Submitted on 19 Oct 2025]
Subcritical states of asymmetric nuclear matter
A.I. Sanzhur🇺🇦 · S. Shlomo🇺🇸
The isobaric caloric curve is considered in subcritical states region. The energy fluctuations along the caloric curve are determined for small nuclear systems which consist of limited number of nucleons. The temperature dependence of heat capacity at fixed pressure is obtained. The calculated quantities of small nuclear system are discussed and checked against the ones for the infinite nuclear matter.
Comments:
Talk at KINR Annual Conference, held on May 26-30, 2025; 11 pages, 3 figures, submitted to Nucl. Phys. At. Energy
Subjects:
Nuclear Theory (nucl-th)
arXiv:
2510.16862 [pdf]
Nucl.Phys.Atom.Energy(2026)·0 citations
08
[Submitted on 20 Oct 2025]
Nonlocality effect in $α$ decay half-lives for even-even nuclei within a two potential approach
Jinyu Hu · Chen Wu
In this paper, we carefully look at the $α$ -decay half-lives of 196 even-even nuclei using a two-potential approach that is made better by taking into account an alpha particle's effective mass that changes with coordinates. The result shows that the accuracy of this model has been improved after considering effective mass for the alpha particle. Furthermore, considering $α$ decay energies derived from three mass models, namely the Weizsacker-Skyrme-4 (WS4) mass model, the relativistic continuum Hartree-Bogoliubov theory mass model, and the FRDM (2012), we extend this model to predict the $α$ -decay half-lives of Z = 118 and 120 isotopes. Finally, we carefully study the predicted $α$ decay energies and half-lives of Z = 118 and 120 isotopes and discuss the shell structure of superheavy nuclei. We found that the shell effect is obvious at N = 178 and at N = 184 in the WS4 mass model and FRDM(2012), while the shell effect is only obvious at N = 184 in the relativistic continuum Hartree-Bogoliubov theory mass model.
Comments:
8 pages, 5 figures
Subjects:
Nuclear Theory (nucl-th)
arXiv:
2510.17232 [pdf]
EPJA(2025)·2 citations
09
[Submitted on 20 Oct 2025]
Photon radiation induced by rescattering in strong-interacting medium with a magnetic field
Yue Zhang (1) · Han-Zhong Zhang (1) ((1) Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University)
The photon radiation induced by rescattering in a magnetized medium is investigated in relativistic heavy-ion collisions. Within the high-energy limit, the photon emission rate and the associated electromagnetic energy loss are derived using the Gyulassy-Levai-Vitev formalism at first order in opacity, for a quark jet propagating a quark-gluon plasma under a background magnetic field. Quantitative analysis shows a slight suppression of the overall photon radiation over a broad range of jet energies in this process. This reduction in photon yield consequently leads to a moderate decrease in the electromagnetic energy loss of the jet. Our results contribute to a better understanding of the electromagnetic properties of strongly interacting matter in high-energy nucleus-nucleus collisions and motivate experimental comparison of photon yields from quark-gluon plasma with similar properties but distinct magnetic field strengths.
Comments:
15 pages, 10 figures
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Theory (hep-th)
arXiv:
2510.17597 [pdf]
PRD(2026)·0 citations

Affiliations

first authorsco-authorsvia INSPIRE