论文标题
Quark-Gluon等离子体对电磁场的动态磁反应
Dynamic Magnetic Response of Quark-Gluon Plasma to Electromagnetic Fields
论文作者
论文摘要
我们研究了相对论鲍尔茨曼方程的框架中，粘性夸克 - 胶状等离子体的电磁响应具有电流保存碰撞项。我们的形式主义在对电磁场的线性响应中的所有顺序均包含耗散效应，同时考虑了扰动场的全部空间和时间依赖性。例如，我们考虑在固定的，均匀的夸克 - 格鲁隆等离子体中两个核的碰撞。我们表明，对于大碰撞能，诱导的磁场由沿轻锥的夸克 - 杜伦等离子体的响应控制。在此极限中，我们在沿核之间的梁轴上得出了磁场的分析表达，并表明其强度仅随$ \ sqrt {s_ \ mathrm {nn}}} \ ge 30 \ $ gev而变化而变化。
We investigate the electromagnetic response of a viscous quark-gluon plasma in the framework of the relativistic Boltzmann equation with current conserving collision term. Our formalism incorporates dissipative effects at all orders in linear response to the electromagnetic field while accounting for the full space- and time-dependence of the perturbing fields. As an example, we consider the collision of two nuclei in a stationary, homogeneous quark-gluon plasma. We show that for large collision energies the induced magnetic fields are governed by the response of quark-gluon plasma along the light-cone. In this limit we derive an analytic expression for the magnetic field along the beam axis between the receding nuclei and show that its strength varies only weakly with collision energy for $\sqrt{s_\mathrm{NN}} \ge 30\,$GeV.
