论文标题
最终州索默菲尔德对暗物质遗物丰度的影响
Final state Sommerfeld effect on dark matter relic abundance
论文作者
论文摘要
如果暗物质（DM）的an灭产物是非依赖性的，并且它们之间有一定的远距离力，则最终状态颗粒可能会产生sommerfeld的效果。我们研究了在热冻结场景中对DM遗物丰度的影响。作为概念的证明，我们认为DM对歼灭成最终状态对的情况是，假设两个最终状态粒子之间的相互作用产生了类似库仑的潜力，并且初始和最终状态粒子的质量相似，因此初始状态和最终状态粒子都是非偏爱的。最终状态sommerfeld（FSS）效应的大小取决于电势的强度以及最终状态颗粒和初始状态颗粒的质量比。我们发现，FSS效应对DM遗物丰度的影响可能很重要，并且电动尺寸的长距离相互作用足够大，足以使校正远远超出观察的准确性。 FSS效应的另一个特征是，当它的时间尺度长于最终状态粒子的寿命时，它可以抑制。作为推论，我们还研究了DM共济会方案，在这种情况下，由于它们的不稳定性，可以降低两个凝集型物之间的初始状态sommerfeld效应，这可能需要考虑到DM遗物丰度的准确计算。
If the annihilation products of dark matter (DM) are non-relativistic and if there is some long-range force between them, there can be Sommerfeld effect for the final state particles. We study this effect on DM relic abundance in the thermal freeze-out scenario. As a proof of concept, we consider the case of a DM pair annihilation into a final state pair, assuming that the mutual interactions between the two final state particles give rise to a Coulomb-like potential, and that the masses of the initial and final state particles are similar, so that both the initial and final state particles are non-relativistic. The size of the final state Sommerfeld (FSS) effect depends on the strength of the potential, as well as on the mass ratio of the final and initial state particles. We find that the impact of the FSS effect on DM relic abundance can be significant, and an electroweak sized long-range interaction is large enough to make a correction well beyond the observational accuracy. Another feature of the FSS effect is that it could be suppressed when its time scale is longer than the lifetime of the final state particles. As a corollary, we also study in the DM coannihilation scenario where the initial state Sommerfeld effect between two coannihilators could be reduced due to their instability, which may need to be taken into account for an accurate calculation of the DM relic abundance.
