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Precision measurements, extra quark-lepton generations and 50 GeV neutrinos | | V.Novikov
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24 Jun 2001 | | Subject: | hep-ph | | Affiliation: | ITEP, Moscow | | Abstract: | The existence of extra chiral generations with all fermions heavier than $m_Z$ is strongly disfavored by the precision electroweak data. However the data still allow a few extra generations if the neutral leptons have masses close to 50 GeV. Such heavy neutrino can be searched in the reaction $e^+ e^- o Nar{N}gamma$. Existence of 50 GeV neutrinos makes standard model Higgs boson invisible. | | Source: | arXiv, hep-ph/0106261 | | Services: | Forum | Review | PDF | Favorites | |
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