论文标题
QCD临界点附近的多体力和核子聚类
Many-body forces and nucleon clustering near the QCD critical point
论文作者
论文摘要
已经提出，可以通过梁的能量扫描（BES）准确监视事件的波动来查找QCD临界点（CP）。该实验计划正在BNL RHIC对撞机。另外，已经研究了冻结处核子的聚类如何影响质子多重性分布和光核的产生。已经发现，即使核力量范围的较小增加也会显着增加聚类，而较大的相关长度$ξ$接近CP，因此由于二元力不切实际而引起的吸引力很大。在本文中，我们表明，CP附近的排斥多体力应克服二元的力量并有效抑制聚类。我们还讨论了当前的实验数据，并指出可能已经观察到聚类下降的位置。
It has been proposed that one can look for the QCD critical point (CP) by the Beam Energy Scan (BES) accurately monitoring event-by-event fluctuations. This experimental program is under way at the BNL RHIC collider. Separately, it has been studied how clustering of nucleons at freezeout affects proton multiplicity distribution and light nuclei production. It was found that even a minor increase of the range of nuclear forces dramatically increases clustering, while large correlation length $ξ$ near CP makes attraction due to binary forces unrealistically large. In this paper we show that repulsive many-body forces near CP should overcome the binary ones and effectively suppress clustering. We also discuss current experimental data and point out locations at which a certain drop in clustering may already be observed.
