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arXiv 0803.3142astro-phgr-qchep-ph
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暗能量与大质量中微子相互作用的宇宙学特征

Cosmological Signatures of the Interaction between Dark-Energy and Massive Neutrinos

Kiyotomo Ichiki, Yong-Yeon Keum

摘要:

我们研究了大质量中微子与经典标量场的相互作用是否是宇宙晚期加速膨胀的起源。本文介绍了中微子探测相互作用暗能量模型中的宇宙微扰理论,计算了宇宙微波背景各向异性和物质功率谱。在这些模型中,中微子质量的演化是由精髓标量场决定的,这是今天宇宙加速的原因。我们考虑了几种类型的标量场势,并对中微子与暗能量之间的耦合参量进行了限制。假设宇宙是平坦的,我们可以从目前的观测中推导出的约束是$\sum m_ν < 0.87 eV$,在95%的置信水平下,对三种中微子的总和。我们还讨论了模型的稳定性问题以及变质量中微子对玻尔兹曼方程中散射项的影响。

英文摘要:

We investigate whether interaction between massive neutrinos and quintessence scalar field is the origin of the late time accelerated expansion of the universe. We present cosmological perturbation theory in neutrinos probe interacting dark-energy models, and calculate cosmic microwave background anisotropies and matter power spectrum. In these models, the evolution of the mass of neutrinos is determined by the quintessence scalar field, which is responsible for the cosmic acceleration today. We consider several types of scalar field potentials and put constraints on the coupling parameter between neutrinos and dark energy. Assuming the flatness of the universe, the constraint we can derive from the current observation is $\sum m_ν < 0.87 eV$ at the 95 % confidence level for the sum over three species of neutrinos. We also discuss on the stability issue of the our model and on the impact of the scattering term in Boltzmann equation from the mass-varying neutrinos.

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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