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Evidence of nuclear geometry-driven anisotropic flow in OO and Ne-Ne collisions at mathbf{sqrt{{textit s}_{rmmathbf {NN}}}} = 5.36 TeV

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arxiv 2509.06428 v1 pith:YFLYGXH7 submitted 2025-09-08 nucl-ex hep-ex

Evidence of nuclear geometry-driven anisotropic flow in OO and Ne-Ne collisions at mathbf{sqrt{{textit s}_{rmmathbf {NN}}}} = 5.36 TeV

classification nucl-ex hep-ex
keywords collisionsflownuclearcentralgeometry-drivenhydrodynamicionslight
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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A central question in strong-interaction physics, governed by quantum chromodynamics (QCD), is whether femto-scale droplets of quark$-$gluon plasma (QGP) form in small collision systems involving projectiles significantly smaller than heavy ions. Collisions of light ions such as $^{16}$O and $^{20}$Ne offer a unique opportunity to probe the emergence of collective behavior in QCD matter. This Letter presents the first measurements of elliptic ($v_2$) and triangular ($v_3$) flow of charged particles in $^{16}$O$-$$^{16}$O and $^{20}$Ne$-$$^{20}$Ne collisions at a center-of-mass energy per nucleon pair of $\sqrt{s_{_{\rm NN}}} = 5.36$ TeV with the ALICE detector. The hydrodynamic model predictions, explicitly incorporating the nuclear structures of $^{16}$O and $^{20}$Ne, exhibit a good agreement with the flow measurements presented. The observed increase of $v_2$ in central Ne$-$Ne collisions relative to OO collisions, driven by the nuclear geometries, highlights the importance of utilizing light nuclei with well-defined geometric shapes to constrain the initial conditions. These findings support the presence of nuclear geometry-driven hydrodynamic flow in light-ion collisions at the LHC.

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Forward citations

Cited by 17 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Centrality dependence of charged-hadron pseudorapidity distributions in oxygen-oxygen collisions at $\sqrt{s_\mathrm{NN}}$ = 5.36 TeV

    nucl-ex 2026-06 accept novelty 8.0

    First measurement of dNch/dη in OO collisions at 5.36 TeV yields midrapidity densities of 41.8 overall and 135 in central events, consistent with PbPb per participant but showing deviations from simple scaling.

  2. Nonflow Subtraction Beyond Two-Particle Correlations

    nucl-th 2026-06 unverdicted novelty 7.0

    A nonflow subtraction framework for m-particle cumulants is developed and tested in HIJING simulations for O+O and d+Au collisions.

  3. Jet Quenching in the Smallest Hadronic Collision Systems

    hep-ph 2026-04 unverdicted novelty 7.0

    pQCD calculations predict jet quenching suppression scaling as R_AB ≈ (√(AB))^{1/3} in small ion collisions, with ^{3}He and ^{6}Li as clean QGP probes and energy loss models giving v_2 ≈ 0 in small systems.

  4. Measurement of charged-particle production in $\sqrt{s_\text{NN}}=9.62$ TeV proton-oxygen collisions as a probe of cosmic-ray air showers with the ATLAS detector

    hep-ex 2026-04 accept novelty 7.0

    ATLAS measured charged-particle production in 9.62 TeV p-O collisions, yielding a fiducial pO cross section of 396 mb and extrapolated p-air inelastic cross section of 406 mb, with distributions an order of magnitude ...

  5. Initial spin fluctuations as a probe of cluster spin structure in $^{16}\mathrm{O}$ and $^{20}\mathrm{Ne}$ nuclei

    nucl-th 2025-12 unverdicted novelty 7.0

    Alpha clustering in 16O and 20Ne suppresses initial spin fluctuations in relativistic collisions, with a scaled ratio of fluctuations between the two systems proposed as a probe of cluster geometry.

  6. Observation of centrality-dependent dijet transverse momentum imbalance in O+O and Ne+Ne collisions at $\sqrt{s_{NN}}$ = 5.36 TeV with the ATLAS detector

    nucl-ex 2026-06 unverdicted novelty 6.0

    ATLAS observes increasing dijet imbalance with centrality in O+O and Ne+Ne collisions at 5.36 TeV, consistent with medium-induced energy loss in small systems.

  7. Yoctosecond imaging of the ground state of $^{129}$Xe at the Large Hadron Collider

    nucl-th 2026-06 unverdicted novelty 6.0

    Bayesian global fit to Xe-Xe and Pb-Pb LHC data infers nearly maximal triaxiality for the 129Xe ground state and extracts two- and three-particle correlations.

  8. Nuclear geometry driven symmetry plane correlations in OO and Ne--Ne collisions at the Large Hadron Collider

    hep-ph 2026-04 unverdicted novelty 6.0

    Simulations of OO and Ne-Ne collisions at 5.36 TeV show symmetry plane correlations that differ in a pattern consistent with tetrahedral 16O and deformed 20Ne nuclear shapes.

  9. Recent ALICE results from light-ion collision systems

    nucl-ex 2026-04 unverdicted novelty 6.0

    ALICE reports new measurements of pseudorapidity density, v2 and v3 flow coefficients, and neutral pion suppression in light-ion collisions, compared to models for particle production and collective phenomena.

  10. Data-driven method to estimate contamination from light ion beam transmutation at colliders

    physics.acc-ph 2025-09 unverdicted novelty 6.0

    A data-driven method is introduced to quantify contamination effects from light-ion beam transmutation using time-dependent control regions and a simple illustrative model.

  11. Wounded parton scaling of multiplicities in ultra-relativistic light- and heavy-ion collisions

    nucl-th 2026-07 conditional novelty 5.0

    With four partons per nucleon and one shared entropy-to-multiplicity scale, a wounded-parton Glauber model with negative-binomial fluctuations fits O+O, Ne+Ne, Xe+Xe, and Pb+Pb multiplicity distributions from 1–80% ce...

  12. Event-by-event fluctuations of elliptic flow in ultrarelativistic O+O collisions

    nucl-th 2026-06 unverdicted novelty 5.0

    In O+O collisions, initial eccentricity and elliptic flow are fluctuation-driven and can be reproduced from a small set of uncorrelated modes.

  13. Analysis note: Long-range near-side correlation in $e^+e^-$ with $W$-boson-pair events at 183-209 GeV with ALEPH archived data

    hep-ex 2026-06 unverdicted novelty 5.0

    Archived ALEPH data analysis finds ridge-like modulations and sign-changing v2 proxy in two-particle correlations for multiplicity above 30-50 in e+e- collisions with W+W- contribution, deviating from Monte Carlo predictions.

  14. Measurements of charged-particle pseudorapidity and transverse momentum distributions in O+O and Ne+Ne collisions at $\sqrt{s_{_\text{NN}}} = 5.36$ TeV with the ATLAS detector

    nucl-ex 2026-06 unverdicted novelty 5.0

    ATLAS measures charged-particle pseudorapidity density and mean transverse momentum in O+O and Ne+Ne collisions at 5.36 TeV as a function of centrality and eta.

  15. Equilibrated fraction of QCD matter in high-energy oxygen--oxygen collisions

    nucl-th 2026-04 unverdicted novelty 5.0

    The equilibrated core in O+O collisions overtakes the nonequilibrium corona above midrapidity multiplicity of about 20, yet corona contributions persist in central events, making pure hydrodynamics inadequate.

  16. The size of the quark-gluon plasma in ultracentral collisions: impact of initial density fluctuations on the average transverse momentum

    nucl-th 2025-11 unverdicted novelty 5.0

    Volume variation with multiplicity in ultracentral collisions is small when total entropy scales with nuclear mass number, as shown by relating it to initial density fluctuation profiles.

  17. Constraining $\alpha$-cluster compactness in $^{16}\rm O$ and $^{20}\rm Ne$ at TeV energies using azimuthal anisotropy

    hep-ph 2026-07 conditional novelty 4.0

    Elliptic flow in TeV OO and Ne–Ne collisions prefers loose α-cluster nuclear profiles over compact ones when compared to LHC Run 3 data in a hybrid IP-Glasma+MUSIC framework.