Study of charged particle multiplicity, average transverse momentum and azimuthal anisotropy in Xe+Xe collisions at $\sqrt{s_{NN}} = 5.44$ TeV using AMPT model

Abstract.

We have studied the average charged particle density ($\langle \mathrm{d} \mathrm{N}_{ch}/\mathrm{d} \eta\rangle$), transverse momentum ($p_{\mathrm{T}}$) spectra, average transverse momentum ($\langle p_{\mathrm{T}}\rangle$) and azimuthal anisotropies of inclusive charged particles produced in Xe+Xe collisions at $\sqrt{s_{\mathrm{NN}}} = 5.44$ TeV using A Multiphase Transport Model (AMPT), which includes the deformation of ¹²⁹Xe nucleus. Calculations have been performed with the string melting version of AMPT model and compared with the recent measurements from the ALICE experiment. The model result overestimates the measured $\langle \mathrm{d} \mathrm{N}_{ch}/\mathrm{d} \eta\rangle$ for central collisions, agrees with the data for mid-central collisions and underestimates the measurements for the peripheral collisions. The centrality dependence of $\langle p_{\mathrm{T}}\rangle$ of charged particles measured in ALICE is not reproduced by the model results. The calculated elliptic flow ($v_{2}$) from AMPT model is larger than the ALICE measurements in central collisions but is consistent with the data for 30-50% collisions centrality. We find that the model shows a mild centrality dependence of triangular flow and overestimates the ALICE measurements. Within the model framework, we have also studied various collision configurations of Xe nuclei such as body-body, tip-tip, side-side and random. We find a strong dependence of the above observable on the collision configurations.