# Identified-particle production in Xe $+$ Xe collisions at $\sqrt{{s}_{NN}}=5.44$ TeV using a multiphase transport model

Rath, Rutuparna (Discipline of Physics, School of Basic Sciences, Indian Institute of Technology Indore, Simrol, Indore 453552, India) ; Tripathy, Sushanta (Discipline of Physics, School of Basic Sciences, Indian Institute of Technology Indore, Simrol, Indore 453552, India) ; Sahoo, Raghunath (Discipline of Physics, School of Basic Sciences, Indian Institute of Technology Indore, Simrol, Indore 453552, India) ; De, Sudipan (Discipline of Physics, School of Basic Sciences, Indian Institute of Technology Indore, Simrol, Indore 453552, India) ; Younus, Mohammed (Department of Physics, Nelson Mandela University, Port Elizabeth 6031, South Africa)

18 June 2019

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 a multiphase transport (AMPT) model with nuclear deformation to study the identified particle production, such as (${\pi }^{+}+{\pi }^{-}$), (${K}^{+}+{K}^{-}$), ${K}_{s}^{0}$, ($p+\overline{p}$), $\varphi$, and ($\Lambda +\overline{\Lambda }$) in Xe+Xe collisions at $\sqrt{{s}_{NN}}=5.44\phantom{\rule{0.28em}{0ex}}\mathrm{TeV}$. We study the $p{}_{T}$ spectra, integrated yield, and $p{}_{T}$-differential and $p{}_{T}$-integrated particle ratios to (${\pi }^{+}+{\pi }^{-}$) and (${K}^{+}+{K}^{-}$) as a function of collision centrality. The particle ratios are focused on strange to nonstrange ratios and baryon to meson ratios. The effect of deformations has also been highlighted by comparing our results to the nondeformation case. We have also compared the results from AMPT string melting and the AMPT default version to explore possible effects of the coalescence mechanism. We observe that the differential particle ratios show strong dependence on centrality while the integrated particle ratios show no centrality dependence. We give a 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 $\sqrt{{s}_{NN}}=5.44\phantom{\rule{0.28em}{0ex}}\mathrm{TeV}$.

Published in: Physical Review C 99 (2019)