arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.09799nucl-thhep-exhep-phnucl-ex
收藏

重离子碰撞中平均横向动量涨落的偏度

Skewness of mean transverse momentum fluctuations in heavy-ion collisions

Giuliano Giacalone, Fernando G. Gardim, Jacquelyn Noronha-Hostler, Jean-Yves Ollitrault

摘要:

我们提出平均横动量($\langle p_t \rangle$)涨落的偏斜度作为相对论核碰撞中流体力学行为的精细探针。我们描述了如何偏度的$\langle p_t \rangle$分布可以通过实验分析,我们使用流体动力学模拟来预测其值。我们预测,特别是$\langle p_t \rangle$波动有积极的歪斜,这是显着大于如果粒子独立发射。我们阐明了这一结果的起源,推导有关的波动$\langle p_t \rangle$的早期热力学量的波动的通用公式。我们假设,大的正偏度的$\langle p_t \rangle$波动是一个通用的预测的流体动力学模型。

英文摘要:

We propose the skewness of mean transverse momentum, $\langle p_t \rangle$, fluctuations as a fine probe of hydrodynamic behavior in relativistic nuclear collisions. We describe how the skewness of the $\langle p_t \rangle$ distribution can be analyzed experimentally, and we use hydrodynamic simulations to predict its value. We predict in particular that $\langle p_t \rangle$ fluctuations have positive skew, which is significantly larger than if particles were emitted independently. We elucidate the origin of this result by deriving generic formulas relating the fluctuations of $\langle p_t \rangle$ to the fluctuations of the early-time thermodynamic quantities. We postulate that the large positive skewness of $\langle p_t \rangle$ fluctuations is a generic prediction of hydrodynamic models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑