PaperPanorama
FAQ

Nuclear Theory·nucl-th

Thursday·November 13, 2025

9 papers—4 primary·5 cross-listed

All9Primary4Cross-lists5
  1. 01

    [Submitted on 11 Nov 2025]

    Electromagnetic Radiation from Baryon-Rich Matter in Heavy-Ion Collisions

    Xiang-Yu Wu🇨🇦 · Charles Gale🇨🇦 · Sangyong Jeon🇨🇦 · Jean-François Paquet🇺🇸 · Björn Schenke🇺🇸 · Chun Shen🇺🇸

    We perform a study of electromagnetic radiation in heavy-ion collisions at Relativistic Heavy Ion Collider (RHIC) Beam Energy Scan (BES) and SPS energies using the iEBE-MUSIC framework, which includes 3D dynamical Monte Carlo Glauber initial conditions, MUSIC (3+1)D viscous relativistic hydrodynamics, and the UrQMD hadronic afterburner. The multistage modeling has been calibrated to hadronic data at RHIC-BES energies using a Bayesian analysis. Integrating the thermal photon emission rates with the medium evolution, we study the direct photon yield and elliptic flow and how they vary with collision energy and emission source. We compare with results obtained by the STAR and PHENIX Collaborations. We employ next-to-leading order thermal QCD dilepton emission rates to compute dilepton invariant mass spectra and extract the effective temperature of the quark-gluon plasma at different collision energies.

    Comments:
    18 pages, 14 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    2511.08773 [pdf]
    3 citations
  2. 02

    [Submitted on 12 Nov 2025]

    Nuclear shape dynamics in low-energy heavy-ion reactions

    K. Hagino

    We discuss recent theoretical developments in low-energy heavy-ion reactions. To this end, we put emphasis on a viewpoint of probing nuclear shapes with heavy-ion reactions. We first discuss a single-channel problem with an optical potential model. We particularly discuss a microscopic modeling of the imaginary part of an optical potential as well as a visualization of quantum interference phenomena observed in heavy-ion elastic scattering. We then discuss multi-channel scattering problems, and demonstrate that heavy-ion fusion reactions at energies around the Coulomb barrier are sensitive to the shape of colliding nuclei, providing a powerful tool to probe nuclear shapes. We finally point out that relativistic heavy-ion collisions have large similarities to low-energy heavy-ion reactions in the context of nuclear shape dynamics.

    Comments:
    10 pages, 10 figures. A talk given at the 29th International Nuclear Physics Conference (INPC2025), Deajon, Korea, May 25-30, 2025. To be published in the EPJ Web of Conferences
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2511.09078 [pdf]
    EPJ Web Conf.(2026)·0 citations
  3. 03

    [Submitted on 12 Nov 2025]

    Explaining higher-order correlations between elliptic and triangular flow

    Mubarak Alqahtani🇸🇦 · Jean-Yves Ollitrault🇫🇷

    The ALICE and CMS Collaborations have analyzed a number of cumulants mixing elliptic flow () and triangular flow (), involving up to particles, in Pb+Pb collisions at the LHC. We unravel an unexpected simplicity in these complex mathematical quantities for collisions at fixed impact parameter. We show that as one increases the order in , for a given order in , the changes in the cumulants are solely determined by the mean elliptic flow in the reaction plane, which originates from the almond-shaped geometry of the overlap area between the colliding nuclei. We derive simple analytic relations between cumulants of different orders on this basis. These relations are in good agreement with recent data from the CMS Collaboration. We argue that agreement will be further improved if the analysis is repeated with a finer centrality binning. We make quantitative predictions for cumulants of order 10 which have not yet been analyzed.

    Comments:
    Published version. 9 pages, 6 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Experiment (hep-ex); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    2511.09283 [pdf]
    PLB(2026)·1 citation
  4. 04

    [Submitted on 12 Nov 2025]

    Nuclear surface energy solving Hartree-Fock equations with Gogny interactions using Lagrange mesh

    Dany Davesne🇫🇷 · Alessandro Pastore🇫🇷 · Jesus Navarro🇪🇸

    Hartree Fock equations for finite range interactions in a slab of nuclear matter are presented and solved using an algorithm based on the Lagrange mesh method. This approach is faster and more efficient than the Numerov algorithm commonly used in the literature. Thanks to the improved numerical accuracy, we were able to perform calculations with sufficiently large boxes to minimize the impact of Friedel oscillations on the final results, achieving a precision on the surface energy within a few dozens of keV. Results are presented for several Gogny interactions that have not been previously discussed. In addition, the inclusion of the spin orbit term is examined, showing a net reduction of 1.2-1.9 MeV in the surface energy.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2511.09359 [pdf]
    EPJA(2026)·0 citations

Affiliations

first authorsco-authorsvia INSPIRE