Dynamical Role of Light Neutral Leptons in Cosmology

Dynamical Role of Light Neutral Leptons in Cosmology
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DOI:
10.1103/physrevlett.42.407
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发表时间:
1979-02
影响因子:
8.6
通讯作者:
S. Tremaine;J. Gunn
S. Tremaine;J. Gunn
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
S. Tremaine;J. Gunn

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利用Vlasov方程,我们证明了大质量星系晕不能由质量为1 MeV的稳定中性轻子组成。由于星系团中的大部分质量可能由剥离的晕组成,我们得出结论,星系团中的“缺失质量”不包括质量为1 MeV的轻子(例如,μ介子或电子中微子)。李和温伯格假设的重轻子(质量为1 GeV)并没有被这个论点排除。
Using the Vlasov equation, we show that massive galactic halos cannot be composed of stable neutral leptons of mass \ensuremath{\lesssim} 1 MeV. Since most of the mass in clusters of galaxies probably consists of stripped halos, we conclude that the "missing mass" in clusters does not consist of leptons of mass \ensuremath{\lesssim} 1 MeV (e.g., muon or electron neutrinos). Lee and Weinberg's hypothetical heavy leptons (mass \ensuremath{\lesssim} 1 GeV) are not ruled out by this argument.