标题： 部分子-强子-弦动力学：相对论能量的非定域输运方法 显示英文标题

标题： Parton-Hadron-String Dynamics: an off-shell transport approach for relativistic energies

摘要： 在新颖的-parton-强子-弦动力学(PHSD)输运方法内分析了相对论性核-核碰撞中的-parton、强子和弦的动力学特性，该方法被应用于从20到160 A GeV的Pb+Pb碰撞，以探索“部分子物质”的时空区域。 我们发现，即使在158 A GeV的顶级SPS能量下的中心碰撞也显示出大量的非部分子物质，即强子或弦状物质，可以将其视为一个强子晕圈。 此外，我们观察到部分子相对于强子的快速度分布影响很小，但由于部分子平均场的排斥作用，在最终K介子的横向质量分布上有着显著的影响。 我们还发现，由于部分子相中由大质量时间-like胶子衰变引起的稍微增强的$s{\bar s}$对产生以及在强子化过程中抗菌体的更大形成，在多奇异抗菌体的产生上有着显著的效果。 所有的微分强子谱都与实验合作的数据进行了比较分析。 显示英文摘要

摘要： The dynamics of partons, hadrons and strings in relativistic nucleus-nucleus collisions is analyzed within the novel Parton-Hadron-String Dynamics (PHSD) transport approach, which is applied to Pb+Pb collisions from 20 to 160 A GeV in order to explore the space-time regions of 'partonic matter'. We find that even central collisions at the top-SPS energy of 158 A GeV show a large fraction of non-partonic, i.e. hadronic or string-like matter, which can be viewed as a hadronic corona. Furthermore, we observe that the partonic phase has a very low impact on rapidity distributions of hadrons but a sizeable influence on the transverse mass distribution of final kaons due to the repulsive partonic mean fields. We also find a significant effect on the production of multi-strange antibaryons due to a slightly enhanced $s{\bar s}$ pair production in the partonic phase from massive time-like gluon decay and a larger formation of antibaryons in the hadronization process. All differential hadron spectra are analyzed in comparison to the data of experimental collaborations.