Nuclear Theory·nucl-th

Wednesday·March 26, 2025

11 papers—5 primary·6 cross-listed

06
[Submitted on 24 Mar 2025] (cross-list from nucl-ex)
Comprehensive Review of 2 $β$ Decay Half-Lives
B. Pritychenko · V.I. Tretyak
The double-beta (2 $β$ )-decay is the rarest nuclear physics process, and its experimental half-lives (T $_{1/2}$ ) exceed the age of the Universe from nine to fourteen orders of magnitude. Double-beta decay was observed, and its half-life was measured in 14 parent nuclei using direct, radiochemical, and geochemical methods. The decay observables are analyzed using the Evaluated Nuclear Structure Data File (ENSDF) procedures, and the recommended T $_{1/2}$ were deduced. Using the calculated values of phase factors, the effective nuclear matrix elements were extracted and compared with available data. Thousands of theoretical and experimental works have been dedicated to these topics in the last 85 years, and we present two data sets of recommended values to encapsulate the results.
Comments:
63 pages, 16 figures, 6 tables
Subjects:
Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
2503.19130 [pdf]
Atom.Data Nucl.Data Tabl.(2025)·15 citations
07
[Submitted on 25 Mar 2025] (cross-list from hep-ph)
Quark antenna in early stage anisotropic QCD matter
Joao Barata🇨🇭 · Carlos A. Salgado🇪🇸 · Joao M. Silva🇵🇹
The states of matter produced in the early stage of heavy ion collisions can be highly anisotropic. If such a feature is sufficiently pronounced, one should expect the final particle distribution inside jets to reflect it in the form of non-trivial angle correlations. In this talk, we discuss a first step in exploring such correlations by studying how a $q q ˉ$ state produced from an initial unpolarized gluon couples to the anisotropies of an underlying static QCD medium. The medium anisotropy is captured by allowing the jet quenching parameter to take different magnitudes in two orthogonal directions in the plane transverse to the jet axis. We find that the final particle distribution is sensitive to the medium anisotropy in the form of an azimuthal angle modulation, and more importantly, that this effect couples directly to the helicity/spin of the final states, offering a novel way to extract the details of the underlying matter which is not accessible with standard jet observables. We further show how such features can be extracted from the Fourier decomposition of the distribution and from final state transverse spin polarization measurements.
Comments:
8 pages, 6 figures
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2503.19224 [pdf]
EPJ Web Conf.(2025)·1 citation
08
[Submitted on 25 Mar 2025] (cross-list from physics.atom-ph)
Atomic determination of the nuclear quadrupole moment $Q (^{209} Bi)$ using the multi-configuration Dirac-Hartree-Fock method
Jiguang Li · Jacek Bieroń · Michel Godefroid · Per Jönsson
The multiconfiguration Dirac-Hartree-Fock method implemented in the Grasp2018 package was employed to calculate the magnetic dipole hyperfine interaction constants and electric field gradients of levels in the ground configuration of the neutral bismuth atom. Combining the calculated electric field gradient of the ground state with the measured electric quadrupole hyperfine interaction constant, we extracted the nuclear quadrupole moment for the $^{209}$ Bi isotope, $Q (^{209} Bi) = - 422 (22)$ ~mb. This value, together with other results obtained from atomic- and molecular-structure calculations, created the ``world average" nuclear quadrupole moment of this isotope, $Q (^{209} Bi) = - 420 (17)$ ~mb.
Subjects:
Atomic Physics (physics.atom-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
2503.19488 [pdf]
Eur.Phys.J.D(2025)·0 citations
09
[Submitted on 25 Mar 2025] (cross-list from hep-ph)
Strongly Interacting Dark Matter admixed Neutron Stars
Yannick Dengler🇦🇹 · Suchita Kulkarni🇦🇹 · Axel Maas🇦🇹 · Kevin Radl🇦🇹
Dark matter may accumulate in neutron stars given its gravitational interaction and abundance. We investigate the influence of strongly-interacting dark matter, described by a QCD-like one-flavor $G_{2}$ gauge theory, on neutron stars. This choice allows to test, for the first time, a first-principles-determined non-Abelian dark matter equation of state, which supports composite fermionic dark matter and thus a Fermi-pressure-stabilized dark matter component. The ordinary matter part of the mixed star is described by available model-agnostic equations of state that interpolate between the low-density regime and high-density regime. We find that strongly-interacting dark matter has a similar impact on neutron stars as other model equation of states and confirm that strongly-interacting dark matter can be accommodated by constraints from neutron star observations within our uncertainties.
Comments:
29 pages, 11 figures; v4: Minor modifications v3: Substantially improved figures with more comparisons to observational data, various minor improvements in the text v2: Added appendix with technical details, various improvements and minor changes
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Astrophysical Phenomena (astro-ph.HE); Nuclear Theory (nucl-th)
arXiv:
2503.19691 [pdf]
SciPost Phys.Core(2026)·7 citations
10
[Submitted on 25 Mar 2025] (cross-list from hep-ph)
Exploring Efimov states in $D^{*} D^{*} D^{*}$ and $D D^{*} D^{*}$ three-body systems
Hai-Long Fu🇨🇳 · Yong-Hui Lin🇩🇪 · Feng-Kun Guo🇨🇳 · Hans-Werner Hammer🇩🇪 · Ulf-G. Meißner🇨🇳 · Akaki Rusetsky🇩🇪 · Xu Zhang🇨🇳
The Efimov effect is an intriguing three-body quantum phenomenon. Searching for Efimov states within the realms of nuclear and hadronic physics presents a challenge due to the inherent inability of natural physical systems to exhibit adjustable two-body scattering lengths. In this study, we examine the potential existence of Efimov states in the $D^{*} D^{*} D^{*}$ and $D D^{*} D^{*}$ three-hadron systems. Utilizing a pionless effective field theory framework, we determine that the presence of Efimov states in the spectrum of the $D^{*} D^{*} D^{*}$ system is contingent upon the existence of an $(I, J) = (1, 2)$ $D^{*} D^{*}$ two-body bound system. If only the $T_{cc}^{+}$ and its heavy quark spin partner $T_{cc}^{*+}$ exist while there is no near-threshold pole in all other $S$ -wave $D^{(*)} D^{*}$ scattering amplitudes, no Efimov effect is expected in the $D^{(*)} D^{*} D^{*}$ systems.
Comments:
25 pages, 8 figures
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2503.19709 [pdf]
JHEP(2025)·10 citations
11
[Submitted on 25 Mar 2025] (cross-list from hep-ph)
The role of chiral symmetry and the non-ordinary $κ / K_{0}^{*} (700)$ nature in $π^{\pm} K_{S}$ femtoscopic correlations
Miguel Albaladejo🇪🇸 · Alejandro Canoa🇪🇸 · Juan Nieves🇪🇸 · Jose Ramón Peláez🇪🇸 · Enrique Ruiz-Arriola🇪🇸 · Jacobo Ruiz de Elvira🇪🇸
We show that the use of realistic $π K$ interactions, obtained from a dispersive analysis of scattering data, as well as relativistic corrections, are essential to describe recently observed $π^{\pm} K_{S}$ femtoscopic correlations. We demonstrate that the spontaneous chiral symmetry breaking dynamics and the non-ordinary features of the $κ / K_{0}^{*} (700)$ resonance, together with large cancellations between isospin channels, produce a large suppression of $π^{\pm} K_{S}$ femtoscopic correlations compared to widely used models. Within an improved version of the standard on-shell factorization formalism, we illustrate that compensating for this interaction suppression leads to source radii smaller than 1 fm, contrary to usual expectations, as well as larger correlation strengths. The relation between these two parameters cannot be accommodated within naive models describing the nature of the resonances. This may raise concerns about the applicability of popular but too simple approaches for systems with light mesons. However, the correlation-suppression effects we demonstrate here will be relevant in any formalism, and substantial corrections may be expected for other femtoscopic systems involving light mesons.
Comments:
5 pages, 5 figures. v2: minor edits to match journal version
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
arXiv:
2503.19746 [pdf]
PLB(2025)·13 citations

Affiliations

first authorsco-authorsvia INSPIRE

Comprehensive Review of 2β Decay Half-Lives

Quark antenna in early stage anisotropic QCD matter

Atomic determination of the nuclear quadrupole moment Q(209Bi) using the multi-configuration Dirac-Hartree-Fock method

Strongly Interacting Dark Matter admixed Neutron Stars

Exploring Efimov states in D∗D∗D∗ and DD∗D∗ three-body systems

The role of chiral symmetry and the non-ordinary κ/K0∗​(700) nature in π±KS​ femtoscopic correlations

Affiliations

Comprehensive Review of 2 $β$ Decay Half-Lives

Atomic determination of the nuclear quadrupole moment $Q (^{209} Bi)$ using the multi-configuration Dirac-Hartree-Fock method

Exploring Efimov states in $D^{} D^{} D^{}$ and $D D^{} D^{*}$ three-body systems

The role of chiral symmetry and the non-ordinary $κ / K_{0}^{*} (700)$ nature in $π^{\pm} K_{S}$ femtoscopic correlations