The rise and fall of the fourth quark-lepton generation
classification
✦ hep-ph
hep-ex
keywords
generationfourthquark-leptonallowbosondatadecayelectroweak
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The existence of the fourth quark-lepton generation is not excluded by the electroweak precision data. However, the recent results on the 126 GeV higgs boson production and decay do not allow an extra generation at least as far as the perturbation theory can be used.
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