arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1307.3453hep-phnucl-exnucl-th
收藏

相对论性重离子碰撞的逐模流体动力学

Mode-by-mode fluid dynamics for relativistic heavy ion collisions

Stefan Floerchinger, Urs Achim Wiedemann

摘要:

我们提出了研究相对论重离子碰撞中涨落的流体动力学传播的差分关于它们的方位角,径向和纵向波长。为此,我们引入了一个背景波动分裂和贝塞尔-傅立叶分解的波动模式。我们演示了如何流体动态演化的现实事件可以建立从个别模式的传播。我们描述了这种模式的模式的流体动力学的主要元素,我们讨论了它在流体动力学分析的重离子碰撞。作为第一个例子,我们量化到什么程度,只有足够大的径向波长的波动有助于谐波流量系数。我们发现,短波长的波动被抑制,不仅由于较大的耗散效应,但也由于冻结超曲面的几何平均。这样,我们的研究进一步证实了图片,谐波流系数给访问一个粗粒度版本的重离子碰撞的初始条件,只有。

英文摘要:

We propose to study the fluid dynamic propagation of fluctuations in relativistic heavy ion collisions differentially with respect to their azimuthal, radial and longitudinal wavelength. To this end, we introduce a background-fluctuation splitting and a Bessel-Fourier decomposition of the fluctuating modes. We demonstrate how the fluid dynamic evolution of realistic events can be build up from the propagation of individual modes. We describe the main elements of this mode-by-mode fluid dynamics, and we discuss its use in the fluid dynamic analysis of heavy ion collisions. As a first illustration, we quantify to what extent only fluctuations of sufficiently large radial wave length contribute to harmonic flow coefficients. We find that fluctuations of short wave length are suppressed not only due to larger dissipative effects, but also due to a geometrical averaging over the freeze-out hyper surface. In this way, our study further substantiates the picture that harmonic flow coefficients give access to a coarse-grained version of the initial conditions for heavy ion collisions, only.

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。

↑