We introduce additional coalescence factors for the production of strange baryons in a multiphase transport (AMPT) model in order to describe the enhanced production of multistrange hadrons observed in $\mathrm{Pb}+\mathrm{Pb}$ collisions at $\sqrt{s_{NN}}=2.76\mathrm{TeV}$ at the Large Hadron Collider (LHC) and $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{s_{NN}}=200\mathrm{GeV}$ at Relativistic Heavy-Ion Collider (RHIC). This extended AMPT model is found to also give a reasonable description of the multiplicity dependence of the strangeness enhancement observed in high multiplicity events in $pp$ collisions at $\sqrt{s}=7\mathrm{TeV}$ and $p$-Pb collisions at $\sqrt{s_{NN}}=5.02\mathrm{TeV}$. We find that the coalescence factors depend on the system size but not much on whether the system is produced from $\mathrm{A}+\mathrm{A}$ or $p+\mathrm{A}$ collisions. The extended AMPT model thus provides a convenient way to model the mechanism underlying the observed strangeness enhancement in collisions of both small and large systems at RHIC and LHC energies.

• Received 19 February 2020
• Accepted 22 June 2020

DOI:https://doi.org/10.1103/PhysRevC.102.014906