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Nuclear Theory·nucl-th

Monday·October 3, 2022

6 papers—2 primary·4 cross-listed

All6Primary2Cross-lists4
  1. 03

    [Submitted on 30 Sept 2022] (cross-list from nucl-ex)

    Laser Spectroscopy for the Study of Exotic Nuclei

    X. F. Yang🇨🇳 · S. J. Wang🇨🇳 · S. G. Wilkins🇺🇸 · R. F. Garcia Ruiz🇺🇸

    Investigation into the properties and structure of unstable nuclei far from stability remains a key avenue of research in modern nuclear physics. These efforts are motivated by the continual observation of unexpected structure phenomena in nuclei with unusual proton-to-neutron ratios. In recent decades, laser spectroscopy techniques have made significant contributions in our understanding of exotic nuclei in different mass regions encompassing almost the entire nuclear chart. This is achieved through determining multiple fundamental properties of nuclear ground and isomeric states, such as nuclear spins, magnetic dipole and electric quadrupole moments and charge radii, via the measurement of hyperfine structures and isotope shifts in the atomic or ionic spectra of the nuclei of interest. These properties, when measured with sufficient precision for a long range of isotopes, offer prominent tests of recently developed state-of-the-art theory and help to stimulate new developments to improve the many-body methods and nucleon-nucleon interactions at the core of these models. With the aim of exploring more exotic short-lived nuclei located ever closer to the proton and neutron driplines, laser spectroscopy techniques, with their continuous technological developments towards higher resolution and higher sensitivity, are extensively employed at current- and next-generation radioactive ion beam facilities worldwide. Ongoing efforts in parallel promise to make even more exotic species available for study at next-generation facilities. Very recently, an innovative application of laser spectroscopy on molecules containing short-lived nuclei has been demonstrated offering additional opportunities for several fields of research, e.g. fundamental symmetry studies and astrophysics.

    Comments:
    129 pages (bibliography 56 pages), 32 figures, invited review for Progress in Particle and Nuclear Physics. Comments and suggestions are welcome
    Subjects:
    Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2209.15228 [pdf]
    PPNP(2023)·154 citations
  2. 04

    [Submitted on 30 Sept 2022] (cross-list from hep-ph)

    Impact of nuclear structure from shell model calculations on nuclear responses to WIMP elastic scattering for F and Xe targets

    Raghda Abdel Khaleq🇦🇺 · Cedric Simenel🇦🇺 · Andrew E. Stuchbery🇦🇺

    Non-relativistic effective field theory (NREFT) is one approach used for describing the interaction of WIMPs with ordinary matter. Among other factors, these interactions are expected to be affected by the structure of the atomic nuclei in the target. The sensitivity of the nuclear response components of the WIMP-nucleus scattering amplitude is investigated using shell model calculations for F and Xe. Resulting integrated nuclear response values are shown to be sensitive to some specifics of the nuclear structure calculations.

    Comments:
    7 pages, 3 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2209.15250 [pdf]
    SciPost Phys.Proc.(2023)·2 citations
  3. 05

    [Submitted on 30 Sept 2022] (cross-list from hep-th)

    NLO finite system size corrections to scattering in theory using newly derived sum of sinc functions

    J.F. Du Plessis🇿🇦 · W. A. Horowitz🇿🇦

    Previously an equation of state for the relativistic hydrodynamics encountered in heavy-ion collisions at the LHC and RHIC has been calculated using lattice gauge theory methods. This leads to a prediction of very low viscosity, due to the calculated trace anomaly. Finite system corrections to this trace anomaly could challenge this calculation, since the lattice calculation was done in an effectively infinite system. In order to verify this trace anomaly it is sensible to add phenomenologically relevant finite system corrections. We investigate massive theory with periodic boundary conditions on of the 3 spatial dimensions. NLO scattering is then computed. Using a newly derived formula for an arbitrary dimensional sum of sinc functions, we show that the NLO finite size corrections preserve unitarity.

    Comments:
    Submission to SciPost
    Subjects:
    High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    2209.15309 [pdf]
    SciPost Phys.Proc.(2024)·0 citations
  4. 06

    [Submitted on 30 Sept 2022] (cross-list from hep-ph)

    Effect of dipole size fluctuations on diffractive photo-production of vector mesons

    Jean-Paul Blaizot🇫🇷 · Marco Claudio Traini🇮🇹

    We consider the diffractive photo-production of vector mesons on a proton, in the dipole model. We take into account the effect of the fluctuations of the the dipole size, whose magnitude is controlled by the overlap between the photon and the vector meson wave functions. Our predictions for the incoherent diffractive cross section, obtained within the Impact Parameter Saturation Model (IPSat), are shown to be in excellent agreement with the HERA data on photo-production, down to very low momentum transfer, where the dipole size fluctuations are shown to play an essential role. This study complements, without introducing any additional parameter, previous treatments of incoherent diffractive processes in terms of fluctuations of the proton shape, by adding another source of ``geometrical'' fluctuations, namely those coming from the splitting of the photon into color dipoles of various sizes.

    Comments:
    27 pages, 4 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2209.15545 [pdf]
    6 citations

Affiliations

first authorsco-authorsvia INSPIRE