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.