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北美退伍军人节(Veterans Day),12 日无更新
arXiv 0911.4775nucl-thhep-exhep-phnucl-ex
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弱和强相互作用系统中多重数和流的快度标度

Rapidity scaling of multiplicity and flow in weakly and strongly interacting systems

Giorgio Torrieri

摘要:

我们研究的“自然性”的标度的多重性和椭圆流$v_2$的快速在弱和强耦合系统。我们表明,多重性缩放可以相对直接地纳入现有的ansatze中,没有不自然的假设,并认为这种缩放对系统的传输特性相对不敏感。另一方面,我们认为,所观察到的椭圆流的缩放是有问题的流体动力学模型(努森数$K \ll 1$)内描述,但更自然地出现在弱耦合系统(其中努森数$\sim 1$)。最后,我们提出了一个概述的方法,使弱耦合系统与椭圆流的绝对值兼容,并指出实验探针,可以澄清这些问题。

英文摘要:

We examine the "naturalness" of the scaling of multiplicity and elliptic flow $v_2$ with rapidity in weakly and strongly coupled systems. We show that multiplicity scaling is relatively straight-forward to incorporate in existing ansatze with no unnatural assumptions, and argue that this scaling is relatively insensitive to the transport properties of the system. On the other hand, we argue that the observed scaling of elliptic flow observed is problematic to describe within a hydrodynamic model (the Knudsen number $K \ll 1$), but arises more naturally within weakly coupled systems (where the Knudsen number $\sim 1$). We conclude by an overview of ways proposed to make weakly coupled systems compatible with the absolute value of elliptic flow, and by indicating experimental probes which could clarify these issues.

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。

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