Enhanced production of strange baryons in high energy nuclear collisions from a multiphase transport model

Abstract

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 Pb-Pb collisions at $\sqrt{{\mathrm{s}}_{\mathrm{NN}}}$ = 2.76 TeV at the Large hadron Collider (LHC) and Au+Au collisions at $\sqrt{{\mathrm{s}}_{\mathrm{NN}}}$ = 200 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 $\sqrt{\mathrm{s}}$ = 7 TeV and $p$-Pb collisions at $\sqrt{{\mathrm{s}}_{\mathrm{NN}}}$ = 5.02 TeV. We find that the coalescence factors depend on the system size but not much on whether the system is produced from A+A or p+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.

arXiv comment15 pages, 5 figures

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• Two-pion interferometry for partially coherent sources in relativistic heavy-ion collisions in a multi-phase transport model
• Study of strange quark density fluctuations in Au+Au Collisions at $\sqrt{s_{NN}}$ = 7.7-200 GeV from AMPT Model
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• Investigating jet induced identified hadron productions from the relative transverse activity classifier in pp collision at LHC
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