Nuclear Theory·nucl-th

Wednesday·December 17, 2025

14 papers—5 primary·9 cross-listed

01
[Submitted on 16 Dec 2025]
Scrutiny of the new class of three-nucleon forces
E. Epelbaum🇩🇪 · A. M. Gasparyan🇩🇪 · J. Gegelia🇩🇪 · D. Hog🇩🇪 · H. Krebs🇩🇪
In a recent publication, Cirigliano {\it et al.} [Phys. Rev. Lett. 135, 022501 (2025)] argue that three-nucleon forces (3NFs) involving short-range operators that couple two pions with two nucleons are enhanced beyond what is expected in chiral effective field theory based on naive dimensional analysis. Here, we scrutinize the arguments and conclusions of that paper by taking into account renormalization scheme dependence of the corresponding low-energy constants. We gain further insights into the expected impact of these 3NFs by comparing them with contributions of similar type, induced by pion-exchange diagrams at lower orders in the chiral expansion. We also estimate the impact of these 3NFs on properties of nuclear matter. After removal of scheme-dependent short-distance components in pion loops, the 3NFs considered by Cirigliano {\it et al.} are shown to yield reasonably small contributions to the equation of state of neutron and symmetric nuclear matter in agreement with expectations based on Weinberg's power counting.
Comments:
18 pages, 7 figures, version accepted for publication in Physical Review C
Subjects:
Nuclear Theory (nucl-th)
arXiv:
2512.14117 [pdf]
1 citation
02
[Submitted on 16 Dec 2025]
Impact of experimental mass of $^{70}$ Kr on the $^{68}$ Se waiting-point in $r p$ -process
Min Zhang · Yudong Luo · Akira Dohi · Xing Xu · Xinliang Yan · Toshitaka Kajino · Yuhu Zhang · Meng Wang
The recent mass measurement of $^{70}$ Kr using the $B ρ$ -defined isochronous mass spectrometry yields a mass excess of $- 41320 (140)$ keV, indicating a 220-keV increase in binding energy compared to the AME2020 prediction. We utilize this experimental mass -- the last piece of information needed -- to model the potential waiting point $^{68}$ Se in $r p$ -process and quantitatively constrain the sequential $p$ -capture reaction flow bypassing this waiting point. Our investigation shows that the more tightly bound nature of $^{70}$ Kr enhances this reaction flow up to a factor of four. This enhancement reduces the effective half-life of $^{68}$ Se. {A} one-zone X-ray burst model calculations reveal that the higher flow of $^{70}$ Kr has distinct effects on the tail structure of light curve and the final SnSbTe abundances in the ashes due to a stronger $r p$ -process heating.
Comments:
6 pages, 5 figures, accepted by Phys. Rev. C
Subjects:
Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
arXiv:
2512.14145 [pdf]
PRC(2025)·1 citation
03
[Submitted on 16 Dec 2025]
Analysis of correlations between dipole transitions $1_{1}^{-} \to 0_{1}^{+}$ and $3_{1}^{-} \to 2_{1}^{+}$ based on the collective model
R.V. Jolos · E.A. Kolganova
The purpose of the work is to evaluate effect of the isovector dipole and quadrupole-octupole modes coupling on the $B (E 1; 1_{1}^{-} \to 0_{1}^{+}) / B (E 1; 3_{1}^{-} \to 2_{1}^{+})$ ratio. The Hamiltonian of the phenomenological collective model is used to calculate mixing of the isovector dipole and quadrupole and octupole modes. The effect of the admixture of the giant dipole resonance to the low-lying collective quadrupole and octupole modes is estimated. It is shown that the coupling of the quadrupole and octupole collective modes to giant dipole resonance leads to decrease of the ratio $B (E 1; 1_{1}^{-} \to 0_{1}^{+}) / B (E 1; 3_{1}^{-} \to 2_{1}^{+})$ relative to the value 7/3 predicted by the pure collective quadrupole-octupole model.
Comments:
10 pages, 1 figure
Subjects:
Nuclear Theory (nucl-th)
arXiv:
2512.14334 [pdf]
PRC(2026)·0 citations
04
[Submitted on 16 Dec 2025]
Modeling Short-Range Nucleon Pair and Triplet Abundances in Atomic Nuclei
I. Wischnevsky Shlush🇮🇱 · A. Denniston🇮🇱 · R. Wagner🇮🇱 · I. Korover🇮🇱 · E. Piasetzky🇮🇱
Short-range correlated (SRC) nucleon pairs provide a sensitive probe of the short-distance structure of atomic nuclei and the underlying nucleon-nucleon (NN) interaction. We present a simple numerical method to estimate the number of two- and three-nucleon SRC clusters using an independent-particle shell model with a harmonic-oscillator basis. The relative abundances of proton-neutron (pn), proton-proton (pp), and neutron-neutron (nn) SRC pairs are calculated for Al, Fe, and Pb nuclei, normalized to carbon, and compared with existing analytical predictions and available extractions from experimental data. We extend the analysis to the isotopes 40Ca, 48Ca, and 54Fe (collectively, the CaFe nuclei), which have been recently measured but whose SRC results are not yet published. These isotopes provide insight into the role of 1f7/2 shell occupancy in SRC pair formation. Finally, we present a reference baseline for three-nucleon SRC cluster abundances across the studied nuclei, assuming 3N clusters originate from independent two-nucleon interactions. The predicted baseline is about 2.5% 3N-SRC/2N-SRC ratio for all medium and heavy nuclei. Deviations from this baseline may indicate the presence of additional short-range nuclear dynamics.
Subjects:
Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
arXiv:
2512.14447 [pdf]
2 citations
05
[Submitted on 16 Dec 2025]
Prediction of deformed halo nuclei $^{43, 45}$ Si from multiple criteria based on structure and reaction analyses
C. Pan · J. L. An · P. Ring · X. H. Wu · P. Papakonstantinou · M.-H. Mun · Y. Kim · S. S. Zhang · K. Y. Zhang
Possible deformed neutron halos in silicon isotopes are investigated from both structure and reaction perspectives using the deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc) combined with the Glauber model. The experimental neutron separation energies of silicon isotopes are well reproduced by the DRHBc theory. Multiple halo criteria are examined, including the global ones based on root-mean-square radii and density profiles, as well as the microscopic ones based on single-particle orbitals and their spatial distributions. Calculations employing different density functionals and pairing strengths consistently indicate the emergence of $p$ -wave neutron halos in $^{43, 45}$ Si, accompanied by pronounced shape decoupling between the halo and the core. Moreover, the enhanced reaction cross sections and the narrow longitudinal momentum distributions of one-neutron removal residues provide additional evidence supporting the halo structures in $^{43, 45}$ Si.
Comments:
14 pages, 7 figures, 1 Supplementary material
Subjects:
Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
arXiv:
2512.14545 [pdf]
PLB(2026)·2 citations

Affiliations

first authorsco-authorsvia INSPIRE

Scrutiny of the new class of three-nucleon forces

Impact of experimental mass of 70Kr on the 68Se waiting-point in rp-process

Analysis of correlations between dipole transitions 11−​→01+​ and 31−​→21+​ based on the collective model

Modeling Short-Range Nucleon Pair and Triplet Abundances in Atomic Nuclei

Prediction of deformed halo nuclei 43,45Si from multiple criteria based on structure and reaction analyses

Affiliations

Impact of experimental mass of $^{70}$ Kr on the $^{68}$ Se waiting-point in $r p$ -process

Analysis of correlations between dipole transitions $1_{1}^{-} \to 0_{1}^{+}$ and $3_{1}^{-} \to 2_{1}^{+}$ based on the collective model

Prediction of deformed halo nuclei $^{43, 45}$ Si from multiple criteria based on structure and reaction analyses