论文标题
一阶相变的Dilepton签名
Dilepton Signature of a First-Order Phase Transition
论文作者
论文摘要
在强烈相互作用物质中寻找一阶相变的搜索是探索量子铬动力学（QCD）相图的主要目标之一。在目前的工作中，我们调查了DILEPTON辐射，该辐射是从弹丸碰撞中在弹丸碰撞中创建的1-2 $ a $ gev的热量火球，用于一阶过渡的潜在签名。为此，我们采用了一个具有两个不同状态方程的流体动力模拟，有和没有相变。后者受到从晶状体QCD和中子星特性消失的化学电位的敏感性的限制，而前者则通过在夸克相中的平均田间修饰来实现。我们发现，涉及一阶过渡的潜热导致低质量热发射信号的大幅增加，大约在交叉场景以上的两倍。
The search for a first-order phase transition in strongly interacting matter is one of the major objectives in the exploration of the phase diagram of Quantum Chromodynamics (QCD). In the present work we investigate dilepton radiation from the hot and dense fireballs created in Au-Au collisions at projectile energies of 1-2 $A$GeV for potential signatures of a first-order transition. Toward this end, we employ a hydrodynamic simulation with two different equations of state, with and without a phase transition. The latter is constrained by susceptibilities at vanishing chemical potential from lattice-QCD as well as neutron star properties, while the former is implemented via modification of the mean-fields in the quark phase. We find that the latent heat involved in the first-order transition leads to a substantial increase in the low-mass thermal emission signal, by about a factor of two above the cross-over scenario.
