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arXiv 2101.02167hep-phhep-ex
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惰性偶极模型中低质量区首阶以上暗物质的残余密度:3。三体终态湮灭

Relic density of dark matter in the inert doublet model beyond leading order for the low mass region: 3. Annihilation in 3-body final state

Shankha Banerjee, Fawzi Boudjema, Nabarun Chakrabarty, Hao Sun

摘要:

我们对暗物质湮灭的$2 \to 3$过程进行了首次单圈电弱修正。当两个壳层上矢量玻色子的湮灭闭合时,这些是进入惰性双重态模型(IDM)低质量区域的遗迹密度计算的主导过程。单循环校正的影响是重要的,因为它们涉及,通过再散射效应,不仅依赖于控制暗扇区的参数,如果在树级进行计算,则不存在,而且还依赖于重正化尺度。这些综合效应应考虑在分析的基础上树级截面的遗物密度计算,作为一个理论上的不确定性,我们发现是远远大于粗略的$\pm 10\%$的不确定性,通常假设,独立的模型参数。

英文摘要:

We perform the first one-loop electroweak corrections for $2 \to 3$ processes for dark matter annihilation. These are the dominant processes that enter the computation of the relic density for the low mass region of the inert doublet model (IDM) when annihilations to two on-shell vector bosons are closed. The impact of the one-loop corrections are important as they involve, through rescattering effects, not only a dependence on the parameter controlling the dark sector, not present if a calculation at tree-level is conducted, but also on the renormalisation scale. These combined effects should be taken into account in analyses based on tree-level cross-sections of the relic density calculations, as a theoretical uncertainty which we find to be much larger than the cursory $\pm 10\%$ uncertainty that is routinely assumed, independently of the model parameters.

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