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arXiv 0812.5085hep-ph
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来自重右手中微子混合的冷暗物质

Cold Dark Matter from heavy Right-Handed neutrino mixing

Alexey Anisimov, Pasquale Di Bari

摘要:

我们发现,在跷跷板机制,一个几乎解耦的RH中微子物种N_DM与质量M_DM \gtrsim 100 GeV可以发挥暗物质(DM)的作用。N_DM可以由质量M_S小于M_DM的热化(源)RH中微子的非绝热转换产生。这是可能的,如果一个不可重正化的运营商被添加到最小的I型跷跷板拉格朗日。在M_DM δ^{1/4} \sim 10^-13 Λ_eff的情况下,观测到的DM丰度可以重现,其中Λ_eff是一个非常高能量的新物理标度,δ \equiv(M_DM-M_S)/M_DM,而\lesssim 1是由RH中微子耦合决定的参数。

英文摘要:

We show that, within the see-saw mechanism, an almost decoupled RH neutrino species N_DM with mass M_DM \gtrsim 100 GeV can play the role of Dark Matter (DM). The N_DM's can be produced from non-adiabatic conversions of thermalized (source) RH neutrinos with mass M_S lower than M_DM. This is possible if a non-renormalizable operator is added to the minimal type I see-saw lagrangian. The observed DM abundance can be reproduced for M_DM δ^{1/4} \sim 10^-13 Λ_eff ξ, where Λ_eff is a very high energy new physics scale, δ\equiv (M_DM-M_S)/M_DM and ξ\lesssim 1 is a parameter determined by the RH neutrino couplings.

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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