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.

15 pages, 5 figures

References in corpus (9)

• Elliptic and triangular flow in p+Pb and peripheral Pb+Pb collisions from parton scatterings
• Enhanced strange baryon production in Au+Au collisions compared to p+p at sqrts = 200 GeV
• Evolution of transverse flow and effective temperatures in the parton phase from a multi-phase transport model
• $\varphi$ and $\Omega$ production in relativistic heavy ion collisions in a dynamical quark coalescence model
• Strangeness production from SPS to LHC
• Long-range azimuthal correlations in proton-proton and proton-nucleus collisions from the incoherent scattering of partons
• Unified description of hadron yield ratios from dynamical core-corona initialization
• $\Omega$ and $\varphi$ in Au + Au ~collisions at \srt~= 200 and 11.5 GeV from a multiphase transport model
• Probing QCD critical fluctuations from the yield ratio of strange hadrons in relativistic heavy-ion collisions

Cited by in corpus (3)

• Further developments of a multi-phase transport model for relativistic nuclear collisions
• Implication of two-baryon azimuthal correlations in $pp$ collisions at LHC energies on the QGP
• Apparent strangeness enhancement from multiplicity selection in high energy proton-proton collisions