论文标题
Lepton对外周相对论重型离子碰撞中的光生生产
Lepton pair photoproduction in peripheral relativistic heavy-ion collisions
论文作者
论文摘要
我们研究了基于我们以前的工作中的形式主义的外围重离子碰撞中的Lepton对光生生产。修订版D 104，056011（2021）]。我们介绍了横向动量，方位角角度和不变质量的分布的数值结果，用于$ e^{+} e^{ - } $和$μ^{+}μ^{ - } $ pairs作为撞击参数和其他动力学变量的函数，而AU+au colusions中的其他动力学变量。我们的计算结合了有关光子横向动量和极化的信息，这对于描述实验数据至关重要。我们观察到Lepton对具有和没有涂片效应的横向动量的拓宽作用。我们还观察到$ \ cos（2φ）$的分布有显着的增强，对于$μ^{+}μ^{ - } $对。我们的结果为未来对其他高阶校正的研究提供了基准，超出了Lepton对生产中出生的近似和中等影响。
We study the lepton pair photoproduction in peripheral heavy-ion collisions based on the formalism in our previous work [Phys. Rev. D 104, 056011 (2021)]. We present the numerical results for the distributions of the transverse momentum, azimuthal angle and invariant mass for $e^{+}e^{-}$ and $μ^{+}μ^{-}$ pairs as functions of the impact parameter and other kinematic variables in Au+Au collisions. Our calculation incorporates the information on the transverse momentum and polarization of photons which is essential to describe the experimental data. We observe a broadening effect in the transverse momentum for lepton pairs with and without smear effects. We also observe a significant enhancement in the distribution of $\cos(2φ)$ for $μ^{+}μ^{-}$ pairs. Our results provide a baseline for future studies of other higher order corrections beyond Born approximation and medium effects in the lepton pair production.
