Identified-particle production in Xe + Xe collisions at sNN=5.44 TeV using a multiphase transport model

Rutuparna Rath,Raghunath Sahoo,Sudipan De,Mohammed Younus,Sushanta Tripathy

doi:10.1103/physrevc.99.064903

Rutuparna Rath, Raghunath Sahoo + Show 3 more

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https://doi.org/10.1103/physrevc.99.064903

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Abstract

Xe+Xe collisions at relativistic energies provide us with an opportunity to study a possible system with deconfined quarks and gluons, whose size is in between those produced by p+p and Pb+Pb collisions. In the present work, we have used AMPT transport model with nuclear deformation to study the identified particle production such as ($\pi^{+}+\pi^{-}$), (K$^{+}$+K$^{-}$), $\rm{K}_{s}^0$, (p+$\bar{\rm{p}}$), $\phi$ and ($\Lambda + \bar{\Lambda}$) in Xe+Xe collisions at $\sqrt{s_{\rm NN}}$=5.44 TeV. We study the $p\rm{_T}$-spectra, integrated yield, $p\rm{_T}$-differential and $p\rm{_T}$-integrated particle ratios to ($\pi^{+}+\pi^{-}$) and (K$^{+}$+K$^{-}$) as a function of collision centrality. The particle ratios are focused on strange to non-strange ratios and baryon to meson ratios. The effect of deformations has also been highlighted by comparing our results to non-deformation case. We have also compared the results from AMPT string melting and AMPT default version to explore possible effects of coalescence mechanism. We observe that the differential particle ratios show strong dependence with centrality while the integrated particle ratios show no centrality dependence.We give thermal model estimation of chemical freeze-out temperature and the Boltzmann-Gibbs Blast Wave analysis of kinetic freeze-out temperature and collective radial flow in Xe+Xe collisions at $\sqrt{s_{\rm{NN}}}$ = 5.44 TeV.

Highlights

Ultrarelativistic heavy ion collision experiments conducted at the BNL Relativistic Heavy Ion Collider (RHIC) and the CERN Large Hadron Collider (LHC) give us opportunities to peek into the past when the universe was a few microseconds old
We study the pT spectra and integrated yield of identified particle production such as (π + + π −), (K+ + K−), Ks0, (p + p), φ, and ( + ̄ )
As the particle production mechanisms are highly dependent on the transverse momentum range—

Summary

INTRODUCTION

Ultrarelativistic heavy ion collision experiments conducted at the BNL Relativistic Heavy Ion Collider (RHIC) and the CERN Large Hadron Collider (LHC) give us opportunities to peek into the past when the universe was a few microseconds old. While initially we have only nucleons and their up and down quarks within the nuclei interacting during collisions, almost all types of known hadrons (including nucleons) are detected, and this indicates that all six types of quarks and many more gluons are produced ( photons, leptons) which were absent initially Study of such enhancement in particle density in comparison to initial ground state nuclear density gives us the direct proof of the high-temperature and dense state of quarks and gluons called QGP. It is believed that medium flow [18,19,20] from the point of the collision as well as any form of fluctuation or anisotropy in the initial stages of collision may greatly determine the spectral shape and nature of these ratios In this context, one may be tempted to note that the momentum anisotropies which are the results of nuclei colliding at different impact parameters may affect the particle ratios.

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RESULTS AND DISCUSSIONS

SUMMARY