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Nuclear Theory·nucl-th

Monday·August 7, 2023

5 papers—4 primary·1 cross-listed

All5Primary4Cross-lists1
  1. 01

    [Submitted on 3 Aug 2023]

    One-proton emission from 148,149,150,151Lu in the DRHBc plus WKB approach

    Yang Xiao · Si-Zhe Xu · Ru-You Zheng · Xiang-Xiang Sun · Li-Sheng Geng · Shi-Sheng Zhang

    One-proton radioactivity in 149Lu, the latest identified proton emitter, is studied in the Wentzel-Kramers-Brillouin (WKB) approach with the proton-nucleus potential extracted from the deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc) for the first time. The predicted half-life turns out to be consistent with the experimental measurement within uncertainties and (almost) independent of the density functionals in the DRHBc theory. Such a microscopic self-consistent calculation reveals that 149Lu is oblately deformed with a quadrupole deformation -0.18, and rules out the possibility of a prolate quadrupole deformation suggested in the nonadiabatic quasiparticle model. We also check the validity of this approach in the description of 150,151Lu and their isomeric states. The deviations of the predicted half-lives from their experimental counterparts are mostly smaller than those of the theoretical studies without considering deformation effects. Furthermore, we predict 148Lu to be a more oblately deformed proton-emitter with a longer half-life than that of 149Lu, which can be checked in the future. Our studies show that the DRHBc plus WKB approach provides a new alternative method to evaluate the half-lives of well-deformed proton emitters.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2308.01942 [pdf]
    PLB(2023)·30 citations
  2. 02

    [Submitted on 4 Aug 2023]

    The evolution of the chiral symmetry in cesium isotopes

    Duo Chen · Jian Li · Rui Guo

    Following the reports of candidate chiral doublet bands observed in cesium isotopes, the possible chiral candidates and the evolution of three-dimensional rotation in are investigated within the microscopic three-dimensional tilted axis cranking covariant density functional theory (3DTAC-CDFT). By investigating the evolution of the polar angle and azimuth angle as a function of rotational frequency , the transition from the planar rotation to the chiral rotation has been found in . The corresponding critical rotational frequency of the appearance of chiral aplanar rotation decreases as neutron number increases, which can be attributed to the neutrons in and shells having smaller angular momentum components along both the short and long axes, and larger components along medium axis, respectively. In comparison, only planar rotation has been obtained in . With these interpretations, the obtained and energy spectra as well as values show reasonable agreement with the available experimental data. In addition, the evolution of quadrupole deformation and triaxial deformation are also discussed.

    Comments:
    10 pages, 8 figures. arXiv admin note: text overlap with arXiv:1706.06127 by other authors
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2308.02099 [pdf]
    EPJA(2023)·9 citations
  3. 03

    [Submitted on 4 Aug 2023]

    Impact of intrinsic electromagnetic structure on the nuclear charge radius in relativistic density functional theory

    Huihui Xie · Jian Li

    In this study, the effects of the nucleon's intrinsic electromagnetic (EM) structure on the nuclear charge radius have been explored within the framework of the relativistic Hartree-Bogoliubov theory. It is found that the intrinsic EM structure corrections could make an effect for accurately describing the evolution of nuclear charge radius. After taking into account the intrinsic EM structure corrections, the descriptions of the evolution of charge radii for Pb, Sn, and Cd isotopes have been improved within relativistic density functional theory. Using the Pb isotopic chain as an example, the improvement in charge radii can be primarily attributed to the intrinsic neutron and neutron spin-orbit terms of the intrinsic EM structure. Additionally, nuclear charge densities and corresponding isotopic evolution in Pb isotopes have been discussed.

    Comments:
    10 pages, 7 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2308.02309 [pdf]
    PRC(2024)·13 citations
  4. 04

    [Submitted on 4 Aug 2023]

    Probing the magnetic field strength dependence of the Chiral Magnetic Effect

    Panos Christakoglou🇳🇱

    The article presents a study aimed at probing the dependence of the Chiral Magnetic Effect (CME) on the magnetic field strength using the Anomalous Viscous Fluid Dynamics (AVFD) model in Pb--Pb at LHC energies. The results demonstrate the quadratic dependence of the correlators used for the study of the CME in heavy ion collisions on the number of spectators, a proxy of the magnitude of the magnetic field. The article also presents the extension of this approach to a two dimensional space, formed by both the aforementioned proxy of the magnetic field strength but also a proxy of the final state ellipticity, a key ingredient of the background in these measurements, for each centrality interval. This provides an exciting possibility to experiments to isolate the background contributions from the potential CME signal.

    Comments:
    submitted to EPJC
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2308.02361 [pdf]
    EPJC(2024)·3 citations
  5. 05

    [Submitted on 4 Aug 2023] (cross-list from hep-ph)

    Effects of odderon spin on helicity amplitudes in elastic scattering

    Prin Sawasdipol🇹🇭 · Jingle B. Magallanes🇵🇭 · Chakrit Pongkitivanichkul🇹🇭 · Daris Samart🇹🇭

    In recent years, the discovery of the odderon, a colorless -odd gluonic compound, has been confirmed in the TOTEM and D0 collaborations. However, the spin quantum number of the odderon remains unidentified. In this work, we aim to attribute a spin of to the odderon in elastic scattering by calculating the helicity amplitudes and the corresponding complex parameter , the ratio of helicity's single-flip to non-flip amplitudes, for the spin-3 tensor odderon with the standard spin-2 tensor pomeron exchanges. Then, we apply these results to the constraints obtained from the STAR experiment at RHIC. By comparing to the contributions of the spin-1 vector odderon and spin-2 tensor pomeron, we demonstrate that the spin-3 tensor odderon, i.e. , provides a better explanation for the observable in elastic scattering.

    Comments:
    11 pages, 2 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2308.02423 [pdf]
    EPJC(2023)·2 citations

Affiliations

first authorsco-authorsvia INSPIRE