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Nuclear Theory·nucl-th

Monday·November 18, 2024

9 papers—2 primary·7 cross-listed

All9Primary2Cross-lists7
  1. 03

    [Submitted on 14 Nov 2024] (cross-list from hep-ph)

    Efficient Quantum Simulation of QCD Jets on the Light Front

    Wenyang Qian🇪🇸 · Meijian Li🇪🇸 · Carlos A. Salgado🇪🇸 · Michael Kreshchuk🇺🇸

    Quark and gluon jets provide one of the best ways to probe the matter produced in ultrarelativistic high-energy collisions, from cold nuclear matter to hot quark-gluon plasma. In this work, we propose a unified framework for efficient quantum simulation of many-body dynamics using the (3+1)-dimensional QCD Hamiltonian on the light front, particularly suited for studying the scattering of quark and gluon jets on nuclear matter in heavy-ion collisions. We describe scalable methods for mapping physical degrees of freedom onto qubits and for simulating in-medium jet evolution. We then validate our framework by implementing an algorithm that directly maps second-quantized Fock states onto qubits and uses Trotterized simulation for simulating time dynamics. Using a classical emulator, we investigate the evolution of quark and gluon jets with up to three particles in Fock states, extending prior studies. These calculations enable the study of key observables, including jet momentum broadening, particle production, and parton distribution functions.

    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th); Quantum Physics (quant-ph)
    arXiv:
    2411.09762 [pdf]
    PRD(2025)·23 citations
  2. 04

    [Submitted on 14 Nov 2024] (cross-list from nucl-ex)

    B states above the -decay threshold studied via BB

    A.N. Kuchera · G. Ryan · G. Selby · D. Snider · S. Anderson · S. Almaraz-Calderon · L.T. Baby · B.A. Brown · K. Hanselman · E. Lopez-Saavedra · K.T. Macon · G.W. McCann and 3 other authors

    The resonance region of B covering excitation energies from 8.4 MeV to 13.6 MeV was investigated with the reaction performed on an enriched B target at the Florida State University Super-Enge Split-Pole Spectrograph of the John D. Fox Superconducting Linear Accelerator Laboratory. Complementary measurements were performed with a target enriched in B to identify possible B contaminants in the reaction. Four strongly populated B states were observed above the -decay threshold. Angular distributions were measured and compared to DWBA calculations to extract angular momentum transfers and spectroscopic factors. The recently observed and heavily discussed resonance at 11.4 MeV in B was not observed in this work. This result is consistent with the interpretation that it is predominantly a resonance with a possible additional contribution. The predicted resonance at 11.6 MeV, analogous to the 11.4-MeV proton resonance, was not observed either. Upper limits for the spectroscopic factors of the 11.4-MeV and 11.6-MeV states were determined. In addition, supporting configuration interaction shell model calculations with the effective WBP interaction are presented.

    Comments:
    7 pages, 3 figures, accepted for publication in Physical Review C as regular article
    Subjects:
    Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2411.09831 [pdf]
    PRC(2024)·1 citation
  3. 05

    [Submitted on 14 Nov 2024] (cross-list from nucl-ex)

    Proton removal from Br to Se at intermediate energies

    M. Spieker · D. Bazin · S. Biswas · P.D. Cottle · P.J. Farris · A. Gade · T. Ginter · S. Giraud · K.W. Kemper · J. Li · S. Noji · J. Pereira and 4 other authors

    We report new experimental data for excited states of Se obtained from proton removal from Br secondary beams on a proton target. The experiments were performed with the Ursinus-NSCL Liquid Hydrogen Target and the combined GRETINA+S800 setup at the Coupled Cyclotron Facility of the National Superconducting Cyclotron Laboratory at Michigan State University. Within uncertainties, the inclusive cross sections for proton removal from Br on a proton target are identical suggesting that the same single-particle orbitals contribute to the proton-removal reaction. In addition, details of the partial cross section fragmentation are discussed. The data might suggest that , and 4 angular momentum transfers are important to understand the population of excited states of Se in proton removal. Available data for excited states of Ge populated through the AsGe proton-removal reaction in normal kinematics suggest indeed that the and shell as well as the orbital contribute. A comparison to data available for odd- nuclei supports that the bulk of the spectroscopic strengths could be found at lower energies in the even-even Se isotopes than in, for instance, the even-even Ge isotopes. In addition, the population of high- states seems to indicate that multi-step processes contribute to proton-removal reactions at intermediate energies in these collective nuclei.

    Comments:
    9 pages, 5 figures
    Subjects:
    Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2411.09835 [pdf]
    PRC(2024)·1 citation
  4. 06

    [Submitted on 15 Nov 2024] (cross-list from physics.atom-ph)

    The hyperfine anomaly in mercury and test of the Moskowitz-Lombardi rule

    J. Vandeleur · G. Sanamyan · B. M. Roberts · J. S. M. Ginges

    The Moskowitz-Lombardi rule gives a simple relation between the magnetic moment of an atomic nucleus and the effect of its radial distribution on the hyperfine structure - the magnetic hyperfine anomaly or "Bohr-Weisskopf" effect. It was originally formulated for mercury, for which experimental data for nuclear magnetic moments and hyperfine constants were available for a number of isotopes. While the relation for the differential effect between isotopes may be completely determined experimentally, the value for the additive constant that is needed to give the Bohr-Weisskopf (BW) effect for a single isotope has remained untested. In this work, we determine the BW effect in singly-ionized and neutral mercury from experimental muonic Hg-199 data together with our atomic calculations. We check this result by directly extracting the BW effect from the hyperfine constant for singly-ionized Hg-199 using state-of-the-art atomic many-body calculations. From this we deduce an empirical value for the additive constant in the Moskowitz-Lombardi rule, which differs significantly from the values advocated previously.

    Subjects:
    Atomic Physics (physics.atom-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2411.09912 [pdf]
    PRA(2025)·0 citations
  5. 07

    [Submitted on 15 Nov 2024] (cross-list from hep-ph)

    Effect of Coriolis Force on Diffusion of D Meson

    Ashutosh Dwibedi🇮🇳 · Nandita Padhan🇮🇳 · Dani Rose J Marattukalam🇮🇳 · Arghya Chatterjee🇮🇳 · Sudipan De🇮🇳 · Sabyasachi Ghosh🇮🇳

    We have attempted to calculate and estimate the spatial diffusion coefficients of D meson through rotating hadron resonance gas, which can be produced in the late stage of peripheral heavy ion collisions. Employing the framework of kinetic theory in relaxation time approximation, and using Einstein's diffusion relation, one can express the spatial diffusion coefficients of D meson as a ratio of its conductivity to its susceptibility. Here, we have tuned D meson relaxation time from the knowledge of earlier works on its spatial diffusion estimations, and then we have extended the framework for the finite rotation picture of hadronic matter, where only the effect of Coriolis force is considered. Our study also revealed the anisotropic nature of diffusion in the presence of rotation with future possibilities of phenomenological signature.

    Comments:
    15 pages, 5 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
    arXiv:
    2411.09983 [pdf]
    J.Phys.G(2025)·5 citations
  6. 08

    [Submitted on 15 Nov 2024] (cross-list from hep-ph)

    Photon polarization tensor at finite temperature and density in a magnetic field

    Kenji Fukushima🇯🇵 · Yoshimasa Hidaka🇯🇵 · Tomoya Uji🇯🇵

    We present analytical and numerical calculations for the photon polarization tensor at finite temperature and density in a constant magnetic field. We first discuss the tensor decomposition in the presence of the magnetic field, which breaks rotational symmetry. Then, we analytically perform all the momentum integrations and numerically take the Landau level sum. We confirm that the imaginary part of the photon polarization tensor correctly reproduces the known result from the independent calculation. We utilize the Kramers-Kronig relation to estimate the real part numerically as a function of the momenta, the chemical potential, and the finite temperature. As an application, we consider the real photon limit and estimate the photon decay rate and the Stokes parameter in the hot and dense medium. We specifically quantify the difference between the X-mode and the O-mode with the polarization orthogonal and parallel to the magnetic field. As long as the magnetic field is weak, the decay rate of the X-mode photon is larger than that of the O-mode photon, while the O-mode becomes dominant due to the Landau level suppression of the X-mode at a strong magnetic field. We also find that the eigenmodes of the propagating photon change their polarization state with increasing density.

    Comments:
    31 pages, 15 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2411.09994 [pdf]
    JHEP(2025)·4 citations
  7. 09

    [Submitted on 15 Nov 2024] (cross-list from hep-ph)

    Dynamic scaling and quenching for heavy quark in the linear expanding medium

    Boris Blok (Technion)🇩🇪 · Chang Wu (Technion)🇩🇪

    We show that scaling is a good approximation for the energy loss of the heavy quark propagating through linear expanding quark-gluon plasma (QGP), the effective quenching parameter does not depend on quark mass.

    Comments:
    16 pages, 2 tables 4 figures. We streamline our discussion of the mass dependence of heavy quark jet energy loss
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2411.10326 [pdf]
    EPJC(2026)·1 citation

Affiliations

first authorsco-authorsvia INSPIRE