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
中科院分区:
文献类型:
--
作者:
S. Tremaine;J. Gunn
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.