Anisotropic Flow Fluctuation in Presence of α-Clustered Structure of 16O Nuclei in O–O collisions at the LHC

Abstract

In this contribution, we explore the effects of the α-cluster nuclear structure of 16O on anisotropic flow and their fluctuations in O–O collisions at s<inf>NN</inf>=7 TeV using a hybrid CGC+hydro model based on IPGlasma + MUSIC + iSS + UrQMD framework. The results of α-cluster nuclear configuration of 16O are also compared with the Woods – Saxon nuclear profile. The results show a strong increase in the ratio of triangular to elliptic flow is observed when going from the top 10–20% to the top 0–10% multiplicity class for the case with α-clusters. Additionally, we find that the elliptic flow fluctuations show opposite trends with a decrease in final state multiplicity for α-cluster and Woods-Saxon nuclear density profiles. We conclude that the observables related to fluctuations are sensitive to the α-clustered geometry in O–O collisions. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.