论文标题
在密集物质中的相变从相变的增强的DILEPTON发射
Enhanced dilepton emission from a phase transition in dense matter
论文作者
论文摘要
证明，在探测密集QCD物质的束能量中，重离子碰撞中存在相变的存在，从而导致由于延长的发射时间而产生的滴杆的diLepton产量显着提高。此外，低质量二种二霉素的温度由于混合阶段而显示出适度的降低。通过以逼真的状态依赖性方程以及两个不同的相变，研究了SIS18-SIS100束能量范围内的二甲蛋白酶发射范围。这是通过将URQMD模型的分子动力学相互作用部分扩展到密度依赖性相互作用电位的高密度最小值的密度相互作用电位来实现的，从而导致相变和亚稳态共存的高密度状态。与高精度测量相同，这些模拟将能够限制QCD中的相变的存在，直到核饱和密度的密度几倍。
It is demonstrated that the presence of a phase transition in heavy ion collisions, at beam energies that probe dense QCD matter, leads to a significant enhancement of the dilepton yield per produced pion due to the extended emission time. In addition, the temperature of low mass dileptons shows a modest decrease due to the mixed phase. The emission of dileptons in the SIS18-SIS100 beam energies range is studied by augmenting the UrQMD transport model with a realistic density dependent equation of state, as well as two different phase transitions. This is achieved by extending the molecular dynamics interaction part of the UrQMD model to a density dependent interaction potential with a high density minimum leading to a phase transition and metastable coexisting high density states. Together with a high precision measurement these simulations will be able to constrain the existence of a phase transition in QCD up to densities of several times nuclear saturation density.
