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The multiplicity percentile dependence of cumulants, of net-proton numberdistributions in Au$-$Au collisions at $\sqrt{s_{NN}} = $ 200 GeV and Pb$-$Pbcollisions at $\sqrt{s_{NN}} = $ 2.76 TeV has been investigated using theAngantyr model (the heavy-ion extension of the \textsc{Pythia 8} model). Theeffects of finite transverse momentum ($p_{\mathrm T}$) and pseudorapidity($\eta$) acceptance on the net-proton cumulants have also been studied.Furthermore, the effects of the hydrodynamic expansion and feed down from weakdecays were explored. It was found that radial flow has substantial impact onthe cumulants and their ratios, while weak decays have a finite but relativelysmaller effect. The obtained values of cumulants and their ratios with theAngantyr model, where the formation of thermalized medium is not assumed canserve as a baseline for future measurements.

physical review. c

Baseline study for net-proton number fluctuations at top energies  available at the BNL Relativistic Heavy Ion Collider and at the CERN Large  Hadron Collider with the Angantyr model