标题： Kerr-Newman黑洞反弹时空带电大质量标量波的轴上吸收和散射 显示英文标题

标题： On-axis absorption and scattering of charged massive scalar waves by Kerr-Newman black-bounce spacetime

摘要： 我们研究了带电质量标量波在沿旋转轴入射时被Kerr-Newman黑洞反弹时空吸收和散射的情况。 我们利用经典解析方法计算了几何和荣耀散射截面，并用部分波法计算了相应的吸收和散射截面，表明它们非常一致。 我们的发现表明，更快（更慢）旋转的时空或更强的排斥（吸引）电场力倾向于减少吸收截面，并导致散射波振荡的角宽度更大（更小）。 此外，旋转参数对超辐射有抑制作用，这与排斥电场力的增强效应形成对比。 正则化参数$k$被发现只能对吸收或散射截面产生微弱影响，但能显著减少超辐射。 对于场质量的影响，发现较重的标量场会导致更大的吸收截面和更宽的微分散射截面干涉条纹。 当超辐射发生时，即吸收截面变为负值时，还发现微分散射截面仅平滑变化，没有明显的定性特征出现。 显示英文摘要

摘要： We investigate the absorption and scattering of charged massive scalar waves by Kerr-Newman black-bounce spacetime when the waves are incident along the rotation axis. We calculate the geometrical and glory scattering cross sections using the classical analytical method and the corresponding absorption and scattering cross sections using the partial wave method, and show that they are in excellent agreement. Our findings indicate that a faster (slower) rotating spacetime or a more repulsive (attractive) electric force tends to reduce (increase) the absorption cross section and result in larger (smaller) angular widths of the scattered wave oscillations. Additionally, the rotation parameter exerts a suppressive influence on superradiance, which contrasts with the enhancing effect of the repulsive electric force. The regularization parameter $k$ is found to modify the absorption or scattering cross sections only weakly, but can cause a noticeable reduction of the superradiance. For the effect of field mass, it is found that a heavier scalar field leads to a larger absorption cross section and a wider interference fringe of the differential scattering cross section. When superradiance happens, i.e., the absorption cross section becomes negative, it is also found that the differential scattering cross section only changes smoothly, with no apparent qualitative feature showing up.