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arXiv 2607.21321nucl-thhep-phnucl-ex

对\(v_{02}(p_T)\)的增强流体动力学预测

Enhanced hydrodynamic predictions for $v_{02}(p_T)$

  • Institute of Nuclear Physics, Polish Academy of Sciences(波兰科学院核物理研究所)
  • AGH University of Krakow(克拉科夫AGH科技大学)
  • Université Paris Saclay(巴黎萨克雷大学)

机构由 AI 辅助整理,请以论文原文为准。

Rupam Samanta, Tribhuban Parida, Jean-Yves Ollitrault

AI总结:

该研究针对新可观测量\(v_{(02)}(p_T)\)进行流体动力学预测,通过数据驱动校正使其与椭圆流数据匹配,给出了不同粒子在不同中心度窗口及\(p_T\)下的预测结果,还发现了\(v_{02}(p_T)\)的一些特殊变化特征。

AI中文摘要:

我们给出了新可观测量\(v_{02}(p_T)\)的流体动力学预测,它测量粒子谱与椭圆流的相关性。我们实施了数据驱动校正,使流体动力学计算与椭圆流\(v_2(p_T)\)数据匹配。校正结果在高\(p_T\)时与\(v_0(p_T)\)数据相当吻合。我们对\(\sqrt{s_{NN}} = 5.02\) TeV的Pb + Pb碰撞,在几个中心度窗口中,对\(p_T = 10\) GeV/c以下的未识别带电强子以及\(p_T = 5 - 6\) GeV/c以下的π介子、K介子和质子的\(v_{02}(p_T)\)进行了预测。对于\(p_T>4\) GeV/c,我们预测中中心碰撞中带电强子的\(v_{02}(p_T)\)会下降以及介子 - 重子分裂。我们还预测了在高于\(30\%\)中心度时低\(p_T\)质子的\(v_{02}(p_T)\)的非单调变化。这是这个新可观测量的一个特定特征,在通常的流可观测量\(v_2(p_T)\)和\(v_0(p_T)\)中未观察到。

英文摘要:

We present hydrodynamic predictions for the new observable $v_{02}(p_T)$, which measures the correlation of particle spectra with elliptic flow. We implement a data-driven correction so as to match hydrodynamic calculations to elliptic flow ($v_2(p_T)$) data. The corrected results are in fair agreement with $v_0(p_T)$ data up to high $p_T$. We make predictions for $v_{02}(p_T)$ of unidentified charged hadrons up to $p_T=10$~GeV$/c$, and of pions, kaons and protons up to $p_T=5-6$~GeV$/c$, in several centrality windows, for Pb+Pb collisions at $\sqrt{s_{NN}}=5.02$~TeV. We predict a decrease of $v_{02}(p_T)$ of charged hadrons for $p_T>4$~GeV$/c$ and meson-baryon splitting for $p_T>3$~GeV$/c$ in mid-central collisions. We also predict a non-monotonic variation of $v_{02}(p_T)$ for protons at low $p_T$ above $30\%$ centrality. This is a specific feature of this new observable, which is not observed for the usual flow observables $v_2(p_T)$ and $v_0(p_T)$.

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