High statistics data sets from experiments at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC) with small and large collision species have enabled a wealth of new flow measurements, including the event-by-event correlation between observables. One exciting such observable $\rho (v_n^2,\left[p_T\right])$ gauges the correlation between the mean transverse momentum of particles in an event and the various flow coefficients ($v_n$) in the same event [P. Bożek, Phys. Rev. C 93, 044908 (2016)]. Recently it has been proposed that very low multiplicity events may be sensitive to initial-state glasma correlations [G. Giacalone, B. Schenke, and C. Shen, Phys. Rev. Lett. 125, 192301 (2020)] rather than flow-related dynamics. We find utilizing the ip-jazma framework that the color domain explanation for the glasma results are incomplete. We then explore predictions from pythia8, and the version for including nuclear collisions called pythia-angantyr, which have only nonflow correlations, and from the ampt model which has both nonflow and flow-type correlations. We find that pythia-angantyr has nonflow contributions to $\rho (v_n^2,\left[p_T\right])$ in $p+\mathrm{O}$, $p+\mathrm{Pb}$, and $\mathrm{O}+\mathrm{O}$ collisions that are positive at low multiplicity and comparable to the glasma correlations. It is striking that in pythia8 in $p+p$ collisions there is actually a sign change from positive to negative $\rho (v_n^2,\left[p_T\right])$ as a function of multiplicity. The ampt results match the experimental data general trends in Pb+Pb collisions at the LHC, except at low multiplicity where ampt has the opposite sign. In $p+\mathrm{Pb}$ collisions, ampt has the opposite sign from experimental data and we explore this within the context of parton geometry. Predictions for $p+\mathrm{O}$, $\mathrm{O}+\mathrm{O}$, and $\mathrm{Xe}+\mathrm{Xe}$ are also presented.

中文翻译：

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探索小碰撞系统中流动谐波和横向动量之间相关性的起源

来自相对论重离子对撞机 (RHIC) 和大型强子对撞机 (LHC) 实验的高统计数据集，具有大小不一的碰撞种类，使得大量新的流动测量成为可能，包括可观测值之间的逐个事件相关性。一个令人兴奋的这样的观察$\rho (v_n^2,\left[{磷}_{吨}\right])$ 衡量事件中粒子的平均横向动量与各种流动系数之间的相关性（$v_n$) 在同一事件中 [P. Bożek，物理。修订版 C 93 , 044908 (2016)]。最近有人提出，非常低的多重性事件可能对初始状态的玻璃体相关性敏感 [G. Giacalone, B. Schenke 和 C. Shen, Phys. 牧师莱特。 125 , 192301 (2020)] 而不是与流动相关的动力学。我们发现使用ip-jazma框架对 glasma 结果的颜色域解释是不完整的。然后，我们探索来自pythia8和包含核碰撞的版本pythia-angantyr 的预测，该版本仅具有非流动相关性，以及来自具有非流动和流动类型相关性的ampt模型。我们发现pythia-angantyr对非流量贡献$\rho (v_n^2,\left[{磷}_{吨}\right])$ 在 $磷+\mathrm{哦}$, $磷+铅$， 和 $\mathrm{哦}+\mathrm{哦}$在低多重性下为正的碰撞并且与玻璃相关性相当。令人惊讶的是，在pythia8中$磷+磷$ 碰撞实际上是从正到负的符号变化 $\rho (v_n^2,\left[{磷}_{吨}\right])$作为多样性的函数。所述AMPT结果匹配实验数据中的Pb + Pb碰撞一般趋势在LHC，除了在低多重其中AMPT具有相反的符号。在$磷+铅$碰撞，ampt与实验数据具有相反的符号，我们在 parton 几何的背景下探索这一点。预测$磷+\mathrm{哦}$, $\mathrm{哦}+\mathrm{哦}$， 和 $氙+氙$ 也提出。