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arXiv 0911.4463hep-phastro-ph.HE
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轻子生成是物质和暗物质的共同起源

Leptogenesis as a Common Origin for Matter and Dark Matter

Haipeng An, Shao-Long Chen, Rabindra N. Mohapatra, Yue Zhang

摘要:

我们提出了一个非对称的暗物质(DM)的模型,其中暗扇区是一个相同的副本的力量和物质的标准模型(SM)中的镜像宇宙模型中讨论的文献。除了通过引力连接外,SM和DM扇区在高温下还通过一组共同的重右手马约拉纳中微子通过它们与轻子和希格斯玻色子的汤川耦合连接起来。暗区(镜像区)中最轻的核子是暗物质的候选者。右手中微子的失平衡衰变通过共振轻子生成在两个扇区中产生相等的轻子不对称性,然后转化为重子和暗重子物质。由于暗核子质量较高而导致的暗重子不对称性导致了与所观察到的熟悉的重子密度相比更高的暗物质密度。在这种情况下,标准模型中微子从反跷跷板机制获得质量。为了保证大爆炸核合成的成功,在两个扇区的U(1)规范场之间引入了动力学混合。

英文摘要:

We propose a model of asymmetric dark matter (DM) where the dark sector is an identical copy of both forces and matter of the standard model (SM) as in the mirror universe models discussed in literature. In addition to being connected by gravity, the SM and DM sectors are also connected at high temperature by a common set of heavy right-handed Majorana neutrinos via their Yukawa couplings to leptons and Higgs bosons. The lightest nucleon in the dark (mirror) sector is a candidate for dark matter. The out of equilibrium decay of right-handed neutrino produces equal lepton asymmetry in both sectors via resonant leptogenesis which then get converted to baryonic and dark baryonic matter. The dark baryon asymmetry due to higher dark nucleon masses leads to higher dark matter density compared to the familiar baryon density that is observed. The standard model neutrinos in this case acquire masses from the inverse seesaw mechanism. A kinetic mixing between the U(1) gauge fields of the two sectors is introduced to guarantee the success of Big-Bang Nucleosynthesis.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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