Effect of Relic Neutrino on Neutrino Pair Emission from Metastable Atoms
Effect of Relic Neutrino on Neutrino Pair Emission from Metastable Atoms
复制标题
残余中微子对亚稳态原子中微子对发射的影响
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
M. Yoshimura
中科院分区：
文献类型：
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作者：
Toru T. Takahashi;M. Yoshimura
本文讨论了利用最近提出的光子辐照亚稳原子中微子对发射过程测量宇宙中微子温度（1.9K）和其它重要物理量如化学势（μ）和退耦温度（Td）的可能性。在最轻的中微子对（质量为2m_1 $）的阈值处，残余中微子的泡利阻塞效应使速率降低了一个很大的因子$\approx（1 + m_1/T_d）/4$。在质量阈值附近的线性阶的修正可以用来改善轻子不对称性的约束。
A possiblity of measuring the cosmic neutrino temperature $\sim 1.9 K$ and other important quantities such as the chemical potential $\mu$ and the decoupling temperature $T_d$ is discussed, using the recently proposed process of photon irradiated neutrino pair emission from metastable atoms. The Pauli blocking effect of relic neutrinos reduces the rate by a large factor $\approx (1 + m_1/T_d)/4$ at the threshold of the lightest neutrino pair (of mass $2m_1$). Correction of linear order in $\mu$ near the mass thresholds can be used to improve the constraint on the lepton asymmetry.
影响因子：
5
作者：
M. Yoshimura
通讯作者：
M. Yoshimura