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Nuclear Theory·nucl-th

Friday·December 12, 2025

10 papers—4 primary·6 cross-listed

All10Primary4Cross-lists6
  1. 01

    Phase transitions at high and low densities for a rotating QCD matter from holography

    Octavio C. Junqueira🇧🇷 · Roldao da Rocha🇧🇷

    We applied the exact Andreev soft-wall holographic model to investigate phase transitions in rotating strongly interacting matter at high and low densities. Using the dual description of hadronic matter and quark-gluon plasma via thermal and charged black holes in five-dimensional AdS space with cylindrical symmetry, we find that for relativistic rotations exceeding 16\% of the speed of light, crossover transitions emerge in the low-density regime up to a critical baryon chemical potential . These smooth transitions, governed by the negative QCD -function, describe a mixed phase of confined and deconfined matter with different angular momenta evolving into a pure plasma at very high temperatures. For , first-order transitions dominate, following the critical-temperature curve of non-rotating matter. The critical point separating the low-density crossovers from high-density first-order transitions is numerically estimated as .

    nucl-thhep-phhep-thNPB(2026)·0 citations
  2. 02

    Impact of the in-medium cross section on cluster spectra in collisions at and

    C.K. Tam🇺🇸 · Z. Chajecki🇺🇸 · R.S. Wang🇺🇸 · F.C.E. Teh🇺🇸 · N. Ikeno🇯🇵 · W.G. Lynch🇺🇸 · A. Ono🇯🇵 · M.B. Tsang🇺🇸 · A. Anthony🇺🇸 · S. Barlini🇮🇹 · J. Barney🇺🇸 · K.W. Brown🇺🇸 and 26 other authors

    Although significant efforts have been made to investigate the density dependence of the nuclear symmetry energy, the influence of the in-medium cross section on particle production in transport models is not well constrained. The in-medium cross section reflects the dynamic situation of the medium such as a nontrivial phase space distribution. In this study, we analyze the transverse momentum spectra of , , , and particles emitted near mid-rapidity in central + reactions at and . The Antisymmetrized Molecular Dynamics () model is chosen as the transport model for data comparison. Central events are selected based on charged-particle multiplicity in both the experimental data and AMD calculations after applying an experimental filter. Our results show that the in-medium nucleon-nucleon scattering cross-sections are more strongly reduced at than at incident energy.

    nucl-thnucl-ex0 citations
  3. 03

    Dynamical correlations across momentum scales in the Quark-Gluon Plasma

    Lipei Du🇺🇸 · P. M. Jacobs🇺🇸

    Experimental probes of the Quark-Gluon Plasma (QGP) generated in heavy-ion collisions span a broad range in momentum scale: low transverse momentum (low ) measurements probe collective dynamics, while high measurements probe the response to QGP excitation by jets (jet quenching). However, the dynamical interplay between QGP collective dynamics and jet quenching is currently poorly understood. We present a new framework for exploring dynamical correlations across momentum scales in heavy-ion collisions, based on the -differential radial-flow observable . Measured phenomenology is traced to the evolution in strength and coherence of distinct underlying fluctuation modes. We then propose new experimental observables to quantify this evolution. The eigenvalue ratio of the reference-aligned covariance matrix is shown to measure the effective fluctuation rank, while the -dependence of the corresponding eigenvectors maps the evolution from a single coherent soft mode to multi-mode dynamics including coalescence and jet quenching. These observables map the soft-mid-hard correlation structure and provide a unified description of the collective-to-partonic transition in the QGP.

    nucl-thhep-phnucl-exPLB(2026)·2 citations
  4. 04

    Stationary Couette-type flows in relativistic fluids

    Lorenzo Gavassino🇬🇧 · Patrick Niekamp🇩🇪 · Sören Schlichting🇩🇪 · Gabriel S Denicol🇧🇷

    We investigate a class of stationary, planar-symmetric solutions of relativistic hydrodynamics, in which a dissipative fluid is confined between two parallel plates that move relative to each other and/or are maintained at different temperatures. We find that neglecting the heat flux leads to qualitatively incorrect flow profiles, even in systems with temperature-independent viscosity. This arises from the fact that, in special relativity, the heat flux itself contributes to the momentum density (the so-called "inertia of heat"). This effect is most evident in the Landau frame, where the fluid removes the excess energy generated by viscous heating by streaming across the boundaries. The analysis is further extended to the limit of vanishing chemical potential.

    nucl-thhep-thphysics.flu-dynPRD(2026)·0 citations

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first authorsco-authorsvia INSPIRE