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arXiv 1106.3887hep-phnucl-th
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尺寸效应与QCD关键终点的寻找

Finite-size effects and the search for the critical endpoint of QCD

Eduardo S. Fraga, Takeshi Kodama, Letícia F. Palhares, Paul Sorensen

摘要:

考虑到在重离子碰撞中创建的系统的有限性,我们显示了相当大的结果,通常在当前的实验中遇到的体积尺度的手性相图的修改,并证明了有限尺寸标度作为一种工具,在实验中搜索的关键端点的适用性。利用RHIC和SPS的数据并假设有限尺寸标度,我们发现RHIC数据从200 GeV到19.6 GeV只与μ \gtrsim 510 MeV的临界点一致。我们还提出了预测目前正在调查的束能量扫描计划在较低的能量波动。

英文摘要:

Taking into account the finiteness of the system created in heavy ion collisions, we show sizable results for the modifications of the chiral phase diagram at volume scales typically encountered in current experiments and demonstrate the applicability of finite-size scaling as a tool in the experimental search for the critical endpoint. Using data from RHIC and SPS and assuming finite-size scaling, we find that RHIC data from 200 GeV down to 19.6 GeV is only consistent with a critical point at μ\gtrsim 510 MeV. We also present predictions for the fluctuations at lower energies currently being investigated in the Beam Energy Scan program.

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