论文标题
揭示重离子碰撞中QCD相变的信号
Revealing the Signal of QCD Phase Transition in Heavy-Ion Collisions
论文作者
论文摘要
我们提出了一种新的方法，可以直接从重型离子碰撞中测得的波动中构建Landau热力学潜力。该电势能够揭示系统中QCD的临界终点（CEP）和一阶相变（FOPT）的信号，甚至远离相变区域。使用可用的实验数据，我们显示FOPT的标准对于大多数碰撞能量，这表示没有FOPT的信号。 $ \ sqrt {s_ \ mathrm {nn}} = 7.7 $ GEV的数据以0-5％的中心性显示出不同的行为，并且数据的平均值满足标准。但是，不确定性仍然太大，无法得出一定的结论。还需要高阶波动来确认信号。因此，我们强调，在$ \ \ sqrt {s_ \ sqrt {s_ \ mathrm {nn}} = 7.7 $ GEV附近，$ c_ {1，...，6} $具有更高精度的新测量值在0-5％的中心性中，最终可能揭示了QCD相过渡的信号。
We propose a novel method to construct the Landau thermodynamic potential directly from the fluctuations measured in heavy-ion collisions. The potential is capable of revealing the signal of the critical end-point (CEP) and the first order phase transition (FOPT) of QCD in the system even away from the phase transition region. With the available experimental data, we show that the criterion of the FOPT is negative for most of the collision energies which indicates no signal of FOPT. The data at $\sqrt{s_\mathrm{NN}}=7.7$ GeV with 0-5% centrality shows a different behavior and the mean value of the data satisfies the criterion. However, the uncertainty is still too large to make a certain conclusion. The higher order fluctuations are also required for confirming the signal. We emphasize therefore that new measurements with higher precision for the $C_{1,...,6}$ within 0-5% centrality in the vicinity of $\sqrt{s_\mathrm{NN}}=7.7$ GeV are in demand which may finally reveal the signal of QCD phase transition.
