Anisotropic flow measurements in OO and Ne-Ne collisions with ALICE

Abstract

The LHC results have demonstrated that small collision systems can exhibit collective behavior reminiscent of that~observed in heavy-ion collisions, opening a new frontier for exploring the connection between nuclear structure and collective dynamics at ultra-relativistic energies. However, the interpretation of collectivity in small collision systems is limited by understanding the proton subnucleonic structure. The ${}^{16}$O and ${}^{20}$Ne collisions delivered by the LHC offer an opportunity to study the influence of nuclear geometry on anisotropic flow in systems where the nuclear structure is well-constrained. In this proceeding, measurements of the anisotropic flow of charged particles, $v_n$, in OO and Ne-Ne collisions involving up to eight-particle correlations are presented, using the multi-particle cumulant method. Furthermore, the first reconstruction of the probability distribution function of elliptic flow $P(v_2)$, and the first measurement of the ratio $v_3\{4\}/v_3\{2\}$ in light-ion collision systems are reported. These measurements provide deeper insight into the role of nuclear geometry-driven flow in light-ion collisions.

arXiv comment4 pages, 6 figures, Proceedings of the 22nd International Conference on Strangeness in Quark Matter (SQM2026)

References in corpus (10)

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• Generic algorithm for multi-particle cumulants of azimuthal correlations in high energy nucleus collisions
• Measurement of the azimuthal anisotropy of charged particles in $\sqrt{s_{\mathrm{NN}}}=5.36$ TeV ${}^{16}$O${+}^{16}$O and ${}^{20}$Ne${+}^{20}$Ne collisions with the ATLAS detector