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Extra Generations, Discrepancies of Electroweak Precision Data and Mass of the Higgs | | V.A. Novikov
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29 May 2002 | | Subject: | hep-ph | | Abstract: | The latest electroweak precision data are analyzed assuming the existence of the fourth generation of leptons ($N, E$) and quarks ($U, D$), which are not mixed with the known three generations. If all four new particles are heavier than $Z$ boson, quality of the fit for the one new generation is as good as for the Standard Model. In the case of neutral leptons with masses around 50 GeV (``partially heavy extra generations’’) the minimum of $chi^2$ is between one and two extra generations. The predicted value of the higgs mass $m_H$ in the presence of the fourth generation can be made rather large. The quality of fits drastically improves when the data on b- and c-quark asymmetries and new NuTeV data on deep inelastic scattering are ignored. | | Source: | arXiv, hep-ph/0205320 | | Services: | Forum | Review | PDF | Favorites | |
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