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We studied the centrality selection effect on cumulants (up to fourth order)and the cumulants ratios of net-proton multiplicity distributions in Au+Aucollisions at $\sqrt{s_{\mathrm{NN}}}$ = 7.7, 19.6 and 200 GeV from UrQMDmodel. The net-proton cumulants are calculated with collision centralities byusing charged particle multiplicity from different pesudorapidity ($\eta$)region. By comparing the results from various collision centralities, we foundthat the autocorrelation effects are not significant in the results withcollision centralities "refmult-3" and "refmult-2", which are usingmid-rapidity charged particles but excluding (anti-)protons and analysisregion, respectively. Furthermore, due to the contributions of spectatorprotons, we observed poor centrality resolution when using charged particles atforward $\eta$ region at low energies. This work can serve as a baseline forcentrality selection of future fluctuations analysis in relativistic heavy-ioncollisions.

Centrality selection effect on higher-order cumulants of net-proton multiplicity distributions in relativistic heavy-ion collisions