论文标题
张量极化和QCD培养基中载体介子的耗散阻尼
Tensor polarization and the dissipative damping of vector meson in QCD Medium
论文作者
论文摘要
出乎意料的是，在重离子碰撞中观察到了媒介介子的大型和令人困惑的自旋比对，因此张量极化。鉴于张量极化代表自旋的波动，我们首次得出了张量极化的波动 - 散引血关系，在张力极化中，极化与一阶水力动力梯度成正比（例如，剪切压力张量），其散发性系数取决于粒子的散射系数，这些散发因素取决于颗粒的散射系数，这些散发因素取决于其谱系的特征，其光谱是其光谱的特征。从现象学上讲，我们发现耗散的贡献具有产生实质性的自旋对准并产生复杂行为的潜力，从而提供了有助于解释实验中观察到的令人困惑现象的见解。
Unexpectedly large and puzzling spin alignment, and thus tensor polarization, of vector mesons has been observed in heavy-ion collisions. Given that tensor polarization represents a fluctuation of spin, we derive, for the first time, a fluctuation-dissipation relation for tensor polarization, where the polarization is proportional to first-order hydrodynamic gradients (e.g., the shear-stress tensor), with dissipative coefficients depending on the particle's damping properties, as characterized by its spectral function. Phenomenologically, we find that the dissipative contributions have the potential to generate substantial spin alignment and give rise to complex behaviors, providing insights that may help explain the puzzling phenomena observed in experiments.
