Recently, the anomalous decay rate of quasinormal modes has been studied for some geometries under scalar field perturbations, which occurs when the longest-lived modes are the ones with higher angular number, as well as the existence of a critical scalar field mass, i.e., the value of scalar field mass such that the decay rate does not depend appreciably on the angular number, and beyond which the behavior of the decay rate is inverted. Here, we consider the propagation of fermionic fields in the background of Schwarzschild–de Sitter black holes, and we show that the anomalous decay rate behavior and the fine structure, related to the coupling between the chirality and the mass of the field, can be observed in the fermionic spectrum.

中文翻译：

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Schwarzschild-de Sitter黑洞中的大规模狄拉克准正规模：异常衰减率和精细结构

最近，已经研究了在标量场扰动下某些几何体的准正态模态的异常衰减率，这种情况是在寿命最长的模态具有较高的角数时出现的，并且存在临界标量场质量，即标量场质量的值，这样衰减率就不会明显地依赖于角数，在该角度数之前，衰减率的行为会反转。在这里，我们考虑了费维离子场在Schwarzschild-de Sitter黑洞背景下的传播，并且表明与手性和场质量之间的耦合有关的异常衰变速率行为和精细结构可以在铁离子光谱中观察到。