论文标题
相对论核冲突中的纵向动力学和粒子产生
Longitudinal dynamics and particle production in relativistic nuclear collisions
论文作者
论文摘要
这项工作提出了一个三维动力学初始化模型，用于相对论重型离子碰撞，在弦线连接处实施局部能量巨头保护和重子电荷波动。该模型使用来自各种碰撞能量的P+P碰撞的实验数据来约束参数，该模型很好地描述了AU+AU碰撞中带电的强子和净质子快速分布，从7.7到200 GEV和200 GEV和PB+PB碰撞，为8.77和17.3 GEV。我们证明了重气孔密度波动对在62.4和200 GEV的碰撞能量中描述净蛋白分布的弦线的重要性。包括这种改进的重子停止描述以及对陌生中性的要求，还可以很好地描述确定的粒子产量，这是碰撞能量以上7.7 GEV的功能。我们进一步研究了最高RHIC能量的不对称P+Al和（P，D，$^3 $ HE）+AU碰撞，P+Pb，Xe+Xe和LHC Energies的Pb+PB碰撞。我们将不对称碰撞系统中产生的粒子速度分布识别为对早期纵向动力学模型的约束特别有用。
This work presents a three-dimensional dynamical initialization model for relativistic heavy-ion collisions, implementing local energy-momentum conservation and baryon charge fluctuations at string junctions. Constraining parameters using experimental data from p+p collisions at various collision energies, the model provides a very good description of the charged hadron and net proton rapidity distributions in Au+Au collisions from 7.7 to 200 GeV and Pb+Pb collisions at 8.77 and 17.3 GeV. We demonstrate the importance of fluctuations of baryon densities to string junctions for describing net-proton distributions at collision energies of 62.4 and 200 GeV. Including this improved baryon stopping description along with the requirement of strangeness neutrality also yields a good description of identified particle yields as functions of the collision energy above 7.7 GeV. We further study asymmetric p+Al and (p, d, $^3$He)+Au collisions at the top RHIC energy and p+Pb, Xe+Xe, and Pb+Pb collisions at LHC energies. We identify the produced particle rapidity distributions in asymmetric collision systems as particularly useful for constraining models of the early-time longitudinal dynamics.
