WIMP丰度和轻子(味)不对称性
WIMP abundance and lepton (flavour) asymmetry
摘要:
我们调查如何大轻子不对称性影响早期宇宙的演化在大爆炸核合成之前的时间,特别是它们如何影响的残骸密度的WIMP暗物质。与标准计算的遗迹WIMP丰度相比,我们发现减少,这取决于轻子味不对称性。我们发现轻子味不对称$l_f= {\cal O}(0.1)$的影响高达20%。
英文摘要:
We investigate how large lepton asymmetries affect the evolution of the early universe at times before big bang nucleosynthesis and in particular how they influence the relic density of WIMP dark matter. In comparison to the standard calculation of the relic WIMP abundance we find a decrease, depending on the lepton flavour asymmetry. We find an effect of up to 20 per cent for lepton flavour asymmetries $l_f= {\cal O}(0.1)$.
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