暗等离子体复合截面的对应原理问题
Problems of the correspondence principle for the recombination cross section in dark plasma
摘要：
本文提出了描述带相反电荷粒子复合的对应原理的有关问题。这些问题来自宇宙学暗物质（DM）问题的研究。具有库仑类相互作用的粒子被认为是。DM粒子之间的这种类似库仑的相互作用是假设的，尽管这个问题似乎更普遍。分析表明，不同的半经典方法的使用导致重组行为的数量之间的明显差异。我们试图找到经典截面（与多软光子过程有关）在半经典近似下（Kramers公式）约化为量子截面的条件。我们只是提请注意这一点，并提供一些（不是决定性的）论点。
英文摘要：
We raise the issues concerning correspondence principle in description of a recombination of oppositely charged particles. These issues have come from cosmological dark matter (DM) problem investigations. Particles possessing Coulomb-like interaction are considered. Such Coulomb-like interaction between DM particles is assumed though the problem seems to be more general. Analysis showed that usage of different semiclassical approaches leads to the apparent discrepancy between numbers of recombination acts. We attempted to find some conditions under which classical cross-section (which relates to multiple soft photon process) reduces to quantum one, which is obtained in semi-classical approximation (Kramers' formula). We just draw attention to this and provide some (not decisive) arguments.
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