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Nuclear Theory·nucl-th

Thursday·September 11, 2025

13 papers—9 primary·4 cross-listed

All13Primary9Cross-lists4
  1. 10

    GUMP1.0 -- First global extraction of generalized parton distributions from experiment and lattice data with NLO accuracy

    Yuxun Guo🇺🇸 · Fatma P. Aslan🇺🇸 · Xiangdong Ji🇺🇸 · M. Gabriel Santiago🇺🇸

    We report the first global extraction of generalized parton distributions (GPDs), GUMP1.0, by combining deeply virtual Compton scattering and -meson production data from Jefferson Lab and Hadron-Electron Ring Accelerator with global fits of parton distribution functions, charge form factors, and lattice quantum chromodynamics simulations. Using a conformal moment space parametrization, we achieve a unified description across low- and high- regions at next to leading order (NLO) accuracy in perturbative corrections. The results provide state-of-the-art GPDs consistent with almost all known facts, enabling three-dimensional nucleon imaging in impact parameter space and, at the same time, establishing a benchmark for future theoretical and experimental studies of the nucleon structure.

    ↳ hep-phhep-latnucl-exnucl-thPRL(2025)·36 citations
  2. 11

    Imaging the Jet-Induced Medium Response with Energy Correlators

    Hannah Bossi🇺🇸 · Arjun Kudinoor🇺🇸 · Ian Moult🇺🇸 · Daniel Pablos🇪🇸 · Ananya Rai🇺🇸 · Krishna Rajagopal🇺🇸

    Quark-gluon plasma (QGP), when viewed at length scales of order the inverse of its temperature, behaves as a strongly-coupled liquid. However, when it is probed with sufficiently high momentum transfer, asymptotic freedom mandates the presence of quark- and gluon-like quasi-particles. High energy partons within jets can trigger these high-momentum exchanges, making jets valuable probes for revealing the presence of such quasi-particles. Such elastic scatterings are implemented in the Hybrid Model, where a jet parton that scatters is deflected, kicking a medium parton, which recoils. Before and after a scattering, as one and then both partons propagate through the medium, they lose energy and momentum, exciting wakes in the QGP droplet. We use two-point and three-point energy-energy correlators (EECs) to reveal the relevant angular regions at which (modified) parton showers and wakes in the QGP each dominate, offering a new way with which to visualize and constrain the corresponding dynamics. We compare our calculations to recent CMS and ALICE measurements of two-point EECs of charged-particle tracks in jets produced in PbPb collisions. We show that our calculations are closest to the experimental measurements when elastic scattering is included and when the elastically scattered recoil-partons produce their own wakes. We also propose a new variant of the measurement that is especially sensitive to jet wakes.

    ↳ hep-phnucl-exnucl-thEPJ Web Conf.(2026)·3 citations
  3. 12

    phase diagram from a fractal NJL model

    E. Megias🇪🇸 · A. Deppman🇧🇷 · V. S. Timóteo🇧🇷

    We propose a -dependent coupling for a fractal effective model (FNJL) to make the results for the phase diagram compatible with the experimental data and lattice QCD calculations. The -dependence of the coupling, which accounts for gluon effects, is obtained by fitting the lattice QCD results for the pseudo-critical temperature with the fractal model. We then use the new effective coupling in order to compute the dynamical mass, the quark condensate, the thermal susceptibility and, finally, the phase diagram. We consider both extensive and non-extensive statistics, and with a slight variation in the -dependent coupling parameters we provide a single result for our model which is able to describe incredibly well the data from STAR, considering the simplicity of the effective model.

    ↳ hep-phhep-latnucl-th0 citations
  4. 13

    Light Meson Resonances

    J. R. Pelaez (U. Complutense de Madrid and IPARCOS)🇪🇸

    We provide a modern pedagogical introduction to light mesons. We discuss their masses and widths, their classification into multiplets of isospin and flavor SU(3), as well as other quantum numbers, mixing schemes, observable states, and their disposition in Regge trajectories. We briefly introduce the relevant concepts of Quantum Chromodynamics, including confinement, chiral symmetry, and the relationship between poles and resonances. We discuss their interpretation in terms of quark-model ordinary quark-antiquark states or non-ordinary states like exotics, multiquarks, or glueballs. Finally, we comment on the open issues that are still under discussion.

    ↳ hep-phnucl-th9 citations

Affiliations

first authorsco-authorsvia INSPIRE