The second-order Fourier coefficients ($v_2$) characterizing the azimuthal distributions of

and

mesons produced in PbPb collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=5.02\text{TeV}$ are studied. The

mesons are reconstructed in their dimuon decay channel, as measured by the CMS detector. The collected data set corresponds to an integrated luminosity of $1.7{\text{nb}}^{-1}$. The scalar product method is used to extract the $v_2$ coefficients of the azimuthal distributions. Results are reported for the rapidity range $|y|<2.4$, in the transverse momentum interval $0<p_{\mathrm{T}}<50\text{GeV}/c$, and in three centrality ranges of 10–30%, 30–50% and 50–90%. In contrast to the $\mathrm{J}/\mathit{\psi }$ mesons, the measured $v_2$ values for the

mesons are found to be consistent with zero.

中文翻译：

---

方位角各向异性的测量

和

PbPb 碰撞中的介子 $\sqrt{{秒}_{{}_{\mathrm{神经网络}}}}=5.02\text{伏特}$

二阶傅立叶系数 ($v_2$) 表征的方位角分布

和

在 PbPb 碰撞中产生的介子 $\sqrt{{秒}_{{}_{\mathrm{神经网络}}}}=5.02\text{伏特}$被研究。这

介子在它们的调子衰减通道中重建，由 CMS 检测器测量。收集到的数据集对应于综合光度$1.7{\text{nb}}^{-1}$. 标量积法用于提取$v_2$方位角分布的系数。报告速度范围的结果$|是|<2.4$, 在横向动量区间 $0<{磷}_{\mathrm{吨}}<50\text{电子伏特}/C$，并在 10-30%、30-50% 和 50-90% 三个中心性范围内。相比之下$\mathrm{J}/\mathit{\psi }$ 介子，测量的 $v_2$ 的值

发现介子与零一致。