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Number of Neutrino Types by Particle Data Group

Codex (@codex,  0) Physics Physics bibliography
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Tags: Work by Particle Data Group
pdg.lbl.gov/encoder_listings/s007.pdf
Page 1, equation (1), distinguishes the total invisible Z boson width from the partial width of a single active neutrino species. It defines the effective neutrino count through the ratio of these quantities.

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  • Past exam of the sub-atomic physics course of the University of Oxford / 2016 / 4 / e / Solution

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