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Nuclear Theory·nucl-th

Friday·June 5, 2026

13 papers—6 primary·7 cross-listed

All13Primary6Cross-lists7
  1. 07

    [Submitted on 29 May 2026] (cross-list from hep-ph)

    Impact of Future Dihadron Production Measurements on the Transversity Distributions and Tensor Charges of the Nucleon

    Yorgo Sawaya🇺🇸 · Christina Cocuzza🇺🇸 · Gregory Matousek🇺🇸 · Matthew McEneaney🇺🇸 · Andreas Metz🇺🇸 · Daniel Pitonyak🇺🇸 · Alexei Prokudin🇺🇸 · Nobuo Sato🇺🇸 · Anselm Vossen🇺🇸

    We assess the impact of future measurements of dihadron production in semi-inclusive deep-inelastic scattering from the CLAS12 and proposed SoLID experiments at Jefferson Lab, as well as from the ePIC experiment at the future Electron-Ion Collider (EIC), on the transversity parton distribution functions (PDFs) and the corresponding tensor charges of the nucleon. To this end, we generate pseudo-data for these experiments for a proton target (CLAS12 and ePIC) and a He target (SoLID and ePIC), and we include these pseudo-data in the JAMDiFF global analysis of existing experimental dihadron data. We find that future data from Jefferson Lab will significantly reduce uncertainties in the transversity PDFs in the region of intermediate-to-large quark momentum fractions , while the EIC will provide strong constraints across the entire range of , allowing for the first experimental test of the predicted small- behavior of the transversity PDFs. In discussing the reduction of uncertainties in the tensor charges, we also compare the results from the data analyses with those from lattice QCD, highlighting scenarios in which compatibility or tension between the two would arise.

    Comments:
    17 pages, 11 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
    arXiv:
    2606.00362 [pdf]
    0 citations
  2. 08

    [Submitted on 3 Jun 2026] (cross-list from quant-ph)

    Continuous-variable ADAPT-VQE for bosonic lattice models

    Dimitrios Athanasakos🇺🇸 · Gloria Tejedor-García🇺🇸 · Jack Y. Araz🇬🇧 · Mafalda Ramôa🇺🇸 · Bharath Sambasivam🇺🇸 · Sophia E. Economou🇺🇸 · Felix Ringer🇺🇸

    We present a continuous-variable adaptive variational quantum eigensolver (CV-ADAPT-VQE). As concrete examples, we consider the ground-state preparation for (i) the Bose-Hubbard model and (ii) the bosonic Kitaev chain, including its extension with an on-site Kerr interaction. The former conserves the total boson number, while the latter conserves global parity. We construct symmetry-preserving operator pools tailored to each case and show, using GPU-based classical simulations, that CV-ADAPT-VQE results in significantly shallower circuits compared to Hamiltonian-based VQE approaches. Our results point toward direct applications in quantum simulations of condensed-matter systems, quantum chemistry, and high-energy physics.

    Comments:
    20 pages, 10 figures
    Subjects:
    Quantum Physics (quant-ph); High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
    arXiv:
    2606.05297 [pdf]
    1 citation
  3. 09

    [Submitted on 3 Jun 2026] (cross-list from hep-lat)

    Gauge field flow for chiral gauge theories on a disk boundary

    Jinlong Dang🇨🇳 · Rohith Karur🇺🇸 · Srimoyee Sen🇺🇸

    A recent non-perturbative formulation of dimensional chiral gauge theories relies on realizing chiral fermions on the dimensional boundary of a dimensional disk manifold. It also requires extending boundary gauge configurations into the interior of the disk using some flow prescription that preserves 2n dimensional gauge invariance. In this paper we propose a concrete realization of the equation of motion flow with the disk embedded on a square lattice. In addition, we couple the flow gauge field to fermions and demonstrate the mechanism of anomaly inflow and anomaly cancellation at work on the lattice.

    Comments:
    minor typos corrected and references updated
    Subjects:
    High Energy Physics — Lattice (hep-lat); High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    2606.05305 [pdf]
    1 citation
  4. 10

    [Submitted on 3 Jun 2026] (cross-list from hep-lat)

    Gauge field flow for chiral gauge theories on a slab

    Jinlong Dang🇨🇳 · Rohith Karur🇺🇸 · Srimoyee Sen🇺🇸

    The proposal to formulate chiral gauge theories using domain wall fermions on dimensional Euclidean lattice with a slab geometry involves dimensional dynamical gauge fields residing on one of the domain walls. The gauge fields are extended into the extra dimension using gradient flow decoupling the mirror fermions on the anti-wall. We implement this construction on the lattice for in the presence of dimensional background gauge fields. We also formulate and implement an additional gauge field flow proposal, where the gauge fields satisfy dimensional equation of motion away from the domain wall, known as the EOM (equation of motion) flow. In both cases, we couple the gauge fields to fermions and demonstrate how current conservation and anomaly inflow work on the lattice.

    Comments:
    minor typo corrections, references updated
    Subjects:
    High Energy Physics — Lattice (hep-lat); High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    2606.05306 [pdf]
    0 citations
  5. 11

    [Submitted on 4 Jun 2026] (cross-list from nucl-ex)

    Observation of Strong -meson Directed Flow at High Baryon Density

    STAR Collaboration

    We report the first observation of a large directed flow () of mesons in mid-central Au+Au collisions at -4.5 GeV, together with the GeV collider-energy result for the collision-energy dependence, measured by the STAR experiment at RHIC. Despite its mesonic nature, the -meson exhibits a magnitude comparable to that of protons and baryons, and is significantly larger (by a factor of ) than that of mesons at the lowest energies. The midrapidity slope shows a pronounced energy dependence similar to that observed for protons and baryons, in contrast to lighter mesons, in the high-baryon-density region. Comparisons with hadronic transport calculations indicate that the observed -meson directed flow is consistent with production via high-mass baryon resonances and the collective motion of baryons influenced by baryonic mean-field interactions. Due to its long lifetime and relatively weak effective - interaction, the meson can retain sensitivity to collective dynamics established during the dense baryonic stage of the collision. These results provide new experimental constraints on baryon-resonance production and strange-hadron transport dynamics in dense QCD matter.

    Comments:
    6 pages, 4 figures
    Subjects:
    Nuclear Experiment (nucl-ex); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
    arXiv:
    2606.05694 [pdf]
    1 citation
  6. 12

    [Submitted on 4 Jun 2026] (cross-list from hep-ph)

    Spin-orbit correlation of quarks within quarkonium

    Tianyang Hu🇨🇳 · Xianghui Cao🇨🇳 · Siqi Xu🇨🇳 · Weijie Du🇨🇳 · Qin-Tao Song🇨🇳 · Yang Li🇨🇳

    The spin-orbit correlation (SOC) provides a unique probe into the internal spin structure of hadrons. Defined via the parity-odd (P-odd) energy-momentum tensor (EMT), this observable can remain non-vanishing even in systems where the total angular momentum is zero. In this study, we connect the formal field-theoretical definition of the SOC to a non-perturbative quantum many-body framework utilizing light-front dynamics. Furthermore, we show how the SOC can be extracted directly from the hadronic matrix elements of the P-odd EMT, establishing a pathway to access this observable within the partonic picture. As a practical application, we compute the transverse and longitudinal SOC distributions for charmonium and mesons. While our findings align with rough estimates based on the Clebsch-Gordan decomposition, we demonstrate that these observables yield rich, non-trivial information regarding partonic dynamics.

    Comments:
    13 pages, 6 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    2606.06263 [pdf]
    0 citations
  7. 13

    [Submitted on 4 Jun 2026] (cross-list from hep-ph)

    Diffusion of multiple conserved charges from entropy production

    Samapan Bhadury🇮🇳 · Arpan Das🇮🇳 · Sandeep Chatterjee🇮🇳 · Hiranmaya Mishra🇮🇳

    We derive dissipative relativistic hydrodynamic equations in the presence of multiple conserved charges, i.e., baryon number (), electric charge (), and strangeness (), using the Chapman-Enskog (CE) method within the kinetic theory approach. The relativistic Boltzmann equation is solved within the relaxation-time approximation with a momentum-independent relaxation time in the collision term. We derive both first-order (Navier-Stokes limit) and second-order dissipative hydrodynamic equations. Within the kinetic theory framework, using the Boltzmann's H-theorem, and by demanding that for a dissipative system, the entropy must be produced, we find different transport coefficients at the first-order and second-order gradient expansion of the out-of-equilibrium distribution function around the local equilibrium. Apart from the well-known transport coefficients, the shear () and the bulk () viscosities , we also find the diffusion matrix elements () for the conserved charges , and . The diffusion matrix elements () are important to model the multi-component diffusion dynamics sourced by inhomogeneous baryon stopping in the initial state of heavy-ion collisions. We estimate the temperature () and chemical potential dependence of diagonal and off-diagonal elements of the diffusion matrix elements for the (2+1) flavor quark-gluon plasma. We further estimate the ratio for a wide range of temperature and chemical potentials to show the relative importance of the diffusion matrix elements compared to other transport coefficients.

    Comments:
    21 pages, 4 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    2606.06283 [pdf]
    0 citations

Affiliations

first authorsco-authorsvia INSPIRE