Predictions for $\sqrt{s_{\mathit{NN}}}=5.02$ TeV Pb + Pb collisions from a multiphase transport model

We present predictions from the string melting version of a multiphase transport model on various observables in Pb+Pb collisions at $\sqrt{s_{\mathit{NN}}}=5.02\mathrm{TeV}$. We use the same version of the model as an earlier study that reasonably reproduced $dN/dy$, $p_T$ spectra and elliptic flow of charged pions and kaons at low-$p_T$ for central and semicentral heavy ion collisions at 200 GeV and 2.76 TeV. While we compare with the already-available centrality dependence data on charged particle $dN/d\eta$ at mid-pseudorapidity in Pb+Pb collisions at 5.02 TeV, we make predictions on identified particle $dN/dy$, $p_T$ spectra, azimuthal anisotropies $v_n(n=2,3,4)$, and factorization ratios $r_n({\eta }^a,{\eta }^b)(n=2,3)$ for longitudinal correlations.

Figure 1

The centrality dependence of $d{N}_{ch}/d\eta$ at mid-pseudorapidity ($\left|\eta \right|<1/2$) from the string melting AMPT model in comparison with data for heavy ion collisions at $\sqrt{s_{\mathit{NN}}}=5.02\mathrm{TeV}$, 2.76 TeV, and 200 GeV.

Figure 2

Ratio of mid-pseudorapidity $d{N}_{ch}/d\eta$ at two different energies from AMPT in comparison with the corresponding ratio derived from experimental data.

Figure 3

$d{N}_{ch}/d\eta$ from the string melting AMPT model for Pb+Pb collisions at (a) $\sqrt{s_{\mathit{NN}}}=2.76\mathrm{TeV}$ and (b) 5.02 TeV in comparison with data (circles). Curves from top to bottom represent, respectively, the AMPT results for the following centralities: 0–5%, 5–10%, 10–20%, 20–30%, 30–40%, 40–50%, 50–60%, 60–70%, 70–80%, and 80–90%.

Figure 4

AMPT results on $dN/dy$ of (a) ${\pi }^{+}$ and (b) $K^{+}$ for Pb+Pb collisions at 5.02 TeV, 2.76 TeV and Au+Au collisions at 200 GeV, in comparison with experimental data at 2.76 TeV and 200 GeV, for 0–5% and 20–30% centralities.

Figure 5

AMPT results on (a) ${\pi }^{+}$ and (b) $K^{+}{p}_T$ spectra at midrapidity in Pb+Pb collisions at 5.02 TeV, 2.76 TeV, and Au+Au collisions at 200 GeV, in comparison with available experimental data, for the 0–5% centrality.

Figure 6

Ratio of $p_T$ spectra at midrapidity at two different energies from AMPT in comparison with data for the 0–5% centrality for (a) ${\pi }^{+}$ and (b) $K^{+}$.

Figure 7

The $p_T$ dependence of $v_2$ at midrapidity from AMPT, in comparison with available experimental data, for the 20–30% centrality for (a) charged pions and (b) charged kaons.

Figure 8

Centrality dependences of charged particle $v_n(n=2,3,4)$ within $1<p_T<2\text{GeV}/c$ and $\left|\eta \right|<2.5$ from AMPT for Pb+Pb collisions in comparison with the ATLAS data at 2.76 TeV.

Figure 9

Ratio of the centrality dependence of charged particle $v_n(n=2,3,4)$ within $1<p_T<2\text{GeV}/c$ and $\left|\eta \right|<2.5$ at two different energies from AMPT.

Figure 10

The $p_T$ dependences of charged particle $v_n(n=2,3,4)$ within $\left|\eta \right|<2.5$ at different centralities from AMPT for Pb+Pb collisions in comparison with the ATLAS data at 2.76 TeV.

Figure 11

AMPT results on the $\eta$ dependence of $v_2$, in comparison with available experimental data, for (a) the 15–25% centrality and (b) the 25–50% centrality.

Figure 12

Ratio of $v_2\left(\eta \right)$ at two different energies from AMPT in comparison with available experimental data.

Figure 13

AMPT results on the factorization ratio $r_2({\eta }^a,{\eta }^b)$ as functions of ${\eta }^a$ in comparison with the CMS 2.76 TeV data for different centralities.

Figure 14

Ratio of the factorization ratio $r_2({\eta }^a,{\eta }^b)$ at 5.02 TeV to that at 2.76 TeV as a function of ${\eta }^a$ for different centralities of Pb+Pb collisions.

Figure 15

Same as Fig. 13 but for factorization ratio $r_3({\eta }^a,{\eta }^b)$.

Figure 16

AMPT results on the centrality dependence of charged particle mean transverse momentum, $\langle p_T\rangle$, at mid-pseudorapidity in comparison with the CMS data at 2.76 TeV and STAR data at 200 GeV.

Figure 17

Ratio of charged particle $\langle p_T\rangle$ at mid-pseudorapidity at two different energies as a function of $N_{\mathrm{part}}$ from AMPT in comparison with data.

Figure 18

AMPT results on protons in Pb+Pb collisions at 5.02 TeV, 2.76 TeV, and Au+Au collisions at 200 GeV: (a) $dN/dy$ for 0–5% and 20–30% centralities, (b) $p_T$ spectra at midrapidity for the 0–5% centrality, and (c) $v_2$ as a function of $p_T$ at midrapidity for the 20–30% centrality. Corresponding experimental data at 2.76 TeV and 200 GeV are also shown for comparison.