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Nuclear Theory·nucl-th

Tuesday·April 14, 2026

20 papers—14 primary·6 cross-listed

All20Primary14Cross-lists6
  1. 15

    [Submitted on 10 Apr 2026] (cross-list from hep-ph)

    A Consistent Treatment of Final-State Interactions in NuWro Quasielastic Channel

    Rwik Dharmapal Banerjee🇵🇱

    In this proceeding, I present a modified treatment of final-state interactions (FSI) in quasielastic (QE) lepton-nucleus scattering within the spectra function (SF) framework of the NuWro Monte Carlo generator. Our approach establishes a consistent correspondence between inclusive cross-section calculations and exclusive descriptions of hadron-propagation by combining a convolution-based formalism at the cross-section level with an event-level implementation in which interactions are classified as transparent or non-transparent within the NuWro intranuclear cascade. This unified framework enables realization of FSI effects across inclusive observables and exclusive final states. We demonstrate the impact of this implementation by comparing predictions to both inclusive electron-scattering data and exclusive MicroBooNE measurements of CCQE-dominated observable, showing that the inclusion of FSI leads to a significant improvement in agreement with the data.

    Comments:
    8 pages, 4 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    2604.09822 [pdf]
    0 citations
  2. 16

    [Submitted on 11 Apr 2026] (cross-list from astro-ph.GA)

    Possible Supermassive Dark Object Composed of Light Fermionic Gas with an Embedded Neutron Star Core

    Daichen Zou🇨🇳 · Xudong Wang🇨🇳 · Bin Qi🇨🇳

    The structure of dark matter admixed neutron stars (DANSs) are investigated, adopting a non-annihilating self-interacting fermionic dark matter (DM) model, with a particular focus on the case of the light DM particle mass GeV. The DANSs become DM-dominated configurations when GeV, where a compact neutron star core becomes embedded within an extremely large DM halo. It is found that the maximum mass of DANSs is inversely proportional to , approximately as , which implies that extremely large masses can be achieved for small . For GeV, the calculated mass and size of the DM halo can be comparable to those of supermassive black holes such as Sgr A*. Our findings hint at a scenario where neutron stars might serve as strong gravitational seeds for such supermassive dark objects.

    Subjects:
    Astrophysics of Galaxies (astro-ph.GA); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2604.10011 [pdf]
    0 citations
  3. 17

    [Submitted on 11 Apr 2026] (cross-list from hep-lat)

    Understanding the structure of nucleon excitations from their wavefunctions

    Jackson A. Mickley🇦🇺 · Waseem Kamleh🇦🇺 · Derek B. Leinweber🇦🇺 · Finn M. Stokes🇦🇺

    Relativistic wavefunctions of nucleon excitations are scrutinised to understand their node structure and the underlying role of local interpolating fields in generating the nucleon spectrum. In addressing quark model perspectives, approximately 4000 propagators are employed on the heaviest PACS-CS ensemble at 702 MeV. We examine the ground and four lowest-lying excited states at zero momentum for both positive- and negative-parity spectra, where the proton's d-quark wavefunction is calculated about the two u quarks at the origin. This is achieved using two local interpolating fields that each carry the quantum numbers of the nucleon but with differing spin-flavour structures, one of which vanishes in the nonrelativistic limit. We find that two distinct types of wavefunction nodes are manifest: "superposition nodes" formed through a linear combination of interpolating fields, and novel "built-in nodes" that are fundamentally built in to the s-wave Dirac components of an individual interpolating field. These are investigated qualitatively through visualisations in the form of both volume and surface renderings, and quantitatively by the calculation of radial wavefunctions. Combined, these findings build a comprehensive picture of the single-particle nucleon spectrum and how its properties derive from fundamental lattice operators.

    Comments:
    29 pages, 22 figures. Version accepted for publication
    Subjects:
    High Energy Physics — Lattice (hep-lat); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2604.10038 [pdf]
    PRD(2026)·0 citations
  4. 18

    [Submitted on 13 Apr 2026] (cross-list from hep-ph)

    Quantum simulating multi-particle processes in high energy nuclear physics: dijet production and color (de)coherence

    João Barata🇨🇭 · Meijian Li🇪🇸 · Wenyang Qian🇪🇸 · Carlos A. Salgado🇪🇸 · João M. Silva🇵🇹

    Hard scattering events in high-energy collisions produce highly virtual partons that subsequently fragment into collimated hadronic cascades. When such partonic showers evolve in a QCD medium, as in deep-inelastic scattering or heavy-ion collisions, the resulting multi-particle distributions encode information about the surrounding matter. Decades of theoretical developments have led to a consistent and order-by-order improvable perturbative description of the shower. This description needs, however, the non-perturbative input that encodes the structure of the hadronic matter. The determination of such input remains challenging within conventional computational approaches, thereby limiting the applicability of the approach. In this work, we develop a framework that employs quantum simulation techniques to compute multi-particle processes in such environments by mapping partonic cross-sections to quantum circuits. As benchmarks, we analyze dipole formation and the QCD antenna radiation pattern at leading order in the strong coupling constant, comparing the results with analytic estimates in simplified limits. The quantum circuit formulation here introduced naturally extends to higher perturbative orders and enables amplitude-level computations in complex matter backgrounds. This provides a systematic foundation for applying quantum information science methods to study multi-particle dynamics in QCD media.

    Comments:
    32 pages, 8 figures, accepted version
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th); Quantum Physics (quant-ph)
    arXiv:
    2604.11616 [pdf]
    JHEP(2026)·6 citations
  5. 19

    [Submitted on 13 Apr 2026] (cross-list from astro-ph.HE)

    Combining the Mass--Radius Posteriors of J0030+0451 Allowing for Unknown Model Systematics

    Ryan O'Connor · Chun Huang · Alexander Y. Chen

    The NASA Neutron star Interior Composition Explorer (\emph{NICER}) mission measures the X-ray pulse profiles of select millisecond pulsars and uses sophisticated pulse profile modeling (PPM) techniques to constrain their masses () and radii (), in order to probe the state of matter in their interiors. One of the most studied pulsars, PSR J0030+0451, has been analyzed by multiple groups using different choices of hotspot models. The different choices of hotspot prescriptions to fit the same observational data led to different -- posteriors that do not completely agree with one another, resulting in a practical bottleneck for dense-matter equation-of-state (EoS) inference. In this paper, we adapt a robust Bayesian combination framework to the published -- posteriors of PSR J0030+0451 while allowing for unknown systematic uncertainties that might have led to the apparently divergent results. Using this technique, we combine eight existing -- posteriors into a single conservative and reproducible posterior that incorporates unknown model systematics across the currently available analyses and is suitable for direct use in EoS studies. The resulting constraint is , , and compactness (68\% credible interval). Incorporating this combined J0030+0451 constraint in an EoS-agnostic joint analysis with PSR~J0437--4715 and GW170817 yields and . Our results provide a combined -- constraint for J0030+0451 and a practical framework for incorporating cross-model uncertainty into neutron star EoS inference pipelines.

    Comments:
    Submitted to ApJ, GitHub repository: https://github.com/roconn0r/CombiningJ0030, Zenodo Repository: https://doi.org/10.5281/zenodo.19222905
    Subjects:
    High Energy Astrophysical Phenomena (astro-ph.HE); Solar and Stellar Astrophysics (astro-ph.SR); Nuclear Theory (nucl-th)
    arXiv:
    2604.11621 [pdf]
    0 citations
  6. 20

    [Submitted on 13 Apr 2026] (cross-list from hep-ph)

    All-charm tetraquarks at hadron colliders: A high-precision fragmentation perspective

    Francesco Giovanni Celiberto🇪🇸

    We present the TQ4Q2.0 fragmentation functions for the production of all-heavy (fully heavy) -wave tetraquarks () with scalar (), axial-vector (), and tensor () quantum numbers in high-energy hadronic collisions. This work extends the previous TQ4Q1.1 framework by incorporating nonconstituent heavy-quark contributions and introducing a replica-based uncertainty-quantification strategy derived from multi-scale variations (MHOUs). The construction follows a nonrelativistic QCD factorization approach, combining gluon- and heavy-quark-initiated fragmentation channels at leading power. Initial-scale inputs are modeled through updated potential-inspired wave functions, while the subsequent DGLAP evolution is performed via the threshold-aware HF-NRevo scheme. A comprehensive systematic analysis of uncertainties is carried out, with contributions from color-composite long-distance matrix elements (LDMEs) and perturbative multiscale inputs. The resulting TQ4Q2.0 grids, publicly released in LHAPDF6 format, provide the first complete phenomenological set for all-heavy exotics, enabling precise studies of all-charm tetraquark production and jet-associated observables within the JETHAD environment. This article completes the high-energy resummation-driven generation of the TQ4Q program and establishes a definitive baseline for future collider-oriented analyses of all-heavy multiquark dynamics.

    Comments:
    50 pages, 13 figures, 5 tables. Version published in Phys. Rev. D. Six NLO collinear FF sets for fully heavy tetraquarks (TQ4Q2.0), covering scalar, axial, and tensor states. Includes MHOU replicas, LDME variations, and DGLAP evolution, released in LHAPDF format at https://github.com/FGCeliberto/Collinear_FFs. Supplemental Mathematica notebook with all short-distance coefficients
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); High Energy Physics — Theory (hep-th); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2604.11646 [pdf]
    PRD(2026)·3 citations

Affiliations

first authorsco-authorsvia INSPIRE