Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-11-16
Phys.Lett. B374 (1996) 127-130
Physics
High Energy Physics
High Energy Physics - Phenomenology
7pp, LaTeX, uses epsf, 5 figures, PS file available at http://venus.itep.ru/preprints/1995/95058.ps.gz
Scientific paper
10.1016/0370-2693(96)00180-3
We consider the bounds for the values of higgs mass $M_H$ and of the mass of the extra quarks and leptons $M_{extra}$ derived from the stability of vacuum and from the absence of Landau pole in Higgs potential. We find that in the case of the absence of new physics up to the GUT scale the bounds for the mass of the 4th generation are so restrictive that the negative result of CDF search for extra quarks closes the window for fourth generation. In the case of the absence of new physics up to $10^5$ GeV we get weaker but still nontrivial bounds on $M_H$ and $M_{extra}$ as well.
Nielsen Holger Bech
Novikov Vladimir A.
Vysotsky M. I.
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