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arXiv 0705.1200hep-phastro-ph
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中微子注入的宇宙学约束

Cosmological Constraints on Neutrino Injection

Toru Kanzaki, Masahiro Kawasaki, Kazunori Kohri, Takeo Moroi

摘要:

我们得出一般的约束遗迹丰度的长寿粒子,主要是衰变成中微子(和其他东西)在宇宙学的时间尺度。这种奇异粒子可能出现在各种粒子物理学模型中,这些模型是基于标准模型之外的物理学。这些约束条件是由大爆炸核合成、宇宙微波背景和散射中微子和光子通量得到的,取决于寿命和电磁与强子的分支比。

英文摘要:

We derive general constraints on the relic abundances of a long-lived particle which mainly decays into a neutrino (and something else) at cosmological time scales. Such an exotic particle may show up in various particle-physics models based on physics beyond the standard model. The constraints are obtained from big-bang nucleosynthesis, cosmic microwave background and diffuse neutrino and photon fluxes, depending on the lifetime and the electromagnetic and hadronic branching ratios.

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