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Nuclear Theory·nucl-th

Wednesday·May 6, 2026

10 papers—3 primary·7 cross-listed

All10Primary3Cross-lists7
  1. 01

    [Submitted on 4 May 2026]

    Chiral symmetry breaking and inhomogeneous phases in thermal anti-de Sitter spacetime

    Sergio Morales-Tejera🇷🇴

    We study the spontaneous breaking of chiral symmetry in an AdS spacetime at finite temperature using the quark-meson model. The condensate is typically inhomogeneous in AdS and is determined from the differential gap equation. We demonstrate that there are no free integration constants in the regular solutions to the differential equation and find that the solution to the boundary value problem is unique. We find that chiral symmetry is always broken close to the AdS boundary. We construct the phase diagram of the system as a function of the AdS curvature and temperature. These two parameters have opposing effects: temperature tends to restore chiral symmetry, whereas negative curvature favors its spontaneous breaking. We also consider how the phase diagram is modified when the Hawking-Page phase transition is taken into account.

    Comments:
    15 pages, 6 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Theory (hep-th)
    arXiv:
    2605.03118 [pdf]
    0 citations
  2. 02

    [Submitted on 5 May 2026]

    Inclusive breakup of three-body projectiles: A unified four-body framework for pair-detected and single-particle observables

    Jin Lei

    Inclusive breakup of three-body projectiles on a target admits two distinct inclusive observables: detection of a correlated pair with unresolved, and detection of a single particle with unresolved. A four-body DWBA sum-rule framework is derived for both channels from a common Hamiltonian. For the pair-detected channel, the unresolved propagator remains the two-body Green function and all three-body projectile effects enter through a pair-projected source built from ; a reference pair-target optical interaction splits this source into a target-elastic reference part and an explicit pair-target coupling part, yielding a state-resolved semi-inclusive coincidence observable and an amplitude-level diagnostic of the two-body cluster approximation. For the single-particle channel, the unresolved propagator is the three-body resolvent, whose reference-channel Feshbach reduction reproduces the Carlson-Frederico-Hussein (CFH) absorptive kernel ; the additional source drives target excitations, with its direct component yielding target-excited CFH-like kernels under a diagonal-intermediate-states approximation. Prior forms are derived for both partitions, with reduced post-prior identities at the single-channel level (pair-detected) and at the CFH-optical level (single-particle). For Li, the explicit deuteron-target coupling has an E1/E2/monopole tidal structure evaluated on the full three-body wave function. The framework is validated by recovery of the two-body IAV, CFH, and detected-cluster limits, and separates exact DWBA identities from later optical and diagonal-target approximations.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2605.03342 [pdf]
    0 citations
  3. 03

    [Submitted on 5 May 2026]

    What is a resonance? And why does it matter?

    Sebastian König🇺🇸 · Kévin Fossez🇺🇸 · Rimantas Lazauskas🇫🇷

    The resonance phenomenon is of central importance in many areas of physics, with particular significance in the study of nuclear structure and reactions. Starting from the classical framework of damped driven oscillations, this text introduces and analyzes quantum-mechanical resonances in a pedagogical and systematic fashion, with emphasis on applications in nuclear physics. Building on the formal theory of resonances, the text elucidates the relationship between experimental observations, phenomenological insights, and computational methods used to characterize and describe resonant states. The discussion encompasses the diverse manifestations of nuclear resonances, ranging from few- to many-body systems, all the way to collective phenomena and to exotic systems that appear near the limits of nuclear stability. References to the relevant literature are provided to assist readers who wish to explore specific topics in more depth.

    Comments:
    25 pages, 5 figures. Invited contribution to the Encyclopedia of Nuclear Physics
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2605.03977 [pdf]
    1 citation

Affiliations

first authorsco-authorsvia INSPIRE