{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.168010.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2967110"}},{"@id":"https://doi.org/10.1103/xqxz-8bhf","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2026","description":"This paper presents the first measurements of the azimuthal anisotropy    coefficients $v_{n}$, which quantify the $n^{\\mathrm{th}}$-order    Fourier modulation of charged-particle azimuthal distributions,    for $n=2$-4 in $\\sqrt{s_{\\mathrm{NN}}}=5.36$ TeV    $\\mathrm{^{16}O}+\\mathrm{^{16}O}$ and $\\mathrm{^{20}Ne}+\\mathrm{^{20}Ne}$    collisions recorded with the ATLAS detector at the Large Hadron Collider in 2025.  The $v_{n}$ coefficients are measured as a function of transverse momentum ($p_{\\mathrm{T}}$),    collision centrality, and event multiplicity.  They are extracted using two complementary methods: two-particle correlations    with a template-fit subtraction of short-range non-flow contributions,    and four-particle subevent cumulants, which intrinsically suppress non-flow    effects and provide sensitivity to flow fluctuations.  The results show a clear hierarchy $v_{2} > v_{3} > v_{4}$ and a non-monotonic    dependence on $p_{\\mathrm{T}}$, reaching a maximum around 2 GeV, consistent with trends    observed in heavy-ion collisions.  Detailed comparisons between the two collision systems reveal an    enhanced $v_{2}$ in central $\\mathrm{^{20}Ne}+\\mathrm{^{20}Ne}$ collisions,    consistent with theory expectations based on the predicted prolate    deformation of neon nuclei, in contrast to the slightly tetrahedral structure    predicted for oxygen.  The four-particle cumulant results highlight strong event-by-event fluctuations    and provide the greatest sensitivity to nuclear shape effects.  These measurements can place new constraints on the initial geometry and the    hydrodynamic response in light-ion collisions, offering valuable input for    models of nuclear structure.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.168010.v1/t1","@type":"Dataset","description":"The \u03a3ETFCal distribution in minimum-bias events, together with the thresholds for a few centrality intervals, for (a) O+O collisions and...","name":"Figure 1a"},{"@id":"https://doi.org/10.17182/hepdata.168010.v1/t2","@type":"Dataset","description":"The \u03a3ETFCal distribution in minimum-bias events, together with the thresholds for a few centrality intervals, for (a) O+O collisions and...","name":"Figure 1b"},{"@id":"https://doi.org/10.17182/hepdata.168010.v1/t3","@type":"Dataset","description":"The \u03a3ETFCal distribution in minimum-bias events, together with the thresholds for a few centrality intervals, for (a) O+O collisions and...","name":"Figure 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