流动的坍缩：探索相变的顺序
Collapse of Flow: Probing the Order of the Phase Transition
摘要：
本文讨论了目前集体流信号的相变的夸克-胶子等离子体（QGP）和集体流的状态方程（EoS）的晴雨表。我们强调的重要性，从1到$50 A$ GeV的流激发函数：在这里的流体动力学模型预测的崩溃的$v_1$ -流在$\sim 10 A$ GeV和$v_2$ -流在$\sim 40 A$ GeV。在后一种情况下，NA 49合作最近观察到了这一点。由于强子再散射模型预测更大的流量比观察到在这个能量，我们解释为一级相变在高重子密度$ρ_B$的潜在证据。
英文摘要：
We discuss the present collective flow signals for the phase transition to the quark-gluon plasma (QGP) and the collective flow as a barometer for the equation of state (EoS). We emphasize the importance of the flow excitation function from 1 to $50 A$ GeV: here the hydrodynamic model has predicted the collapse of the $v_1$-flow at $\sim 10 A$ GeV and of the $v_2$-flow at $\sim 40 A$ GeV. In the latter case, this has recently been observed by the NA49 collaboration. Since hadronic rescattering models predict much larger flow than observed at this energy, we interpret this observation as potential evidence for a first order phase transition at high baryon density $ρ_B$.
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