Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-06-02
Eur.Phys.J.C50:647-654,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTex, 20 pages, 3 figures. Comments added. Published version in Eur.Phys.J.C
Scientific paper
10.1140/epjc/s10052-007-0232-8
In the SU(5)/SO(5) little Higgs models radiative corrections give rise to the SU(2)_L x U(1)_Y symmetry breaking. In this work we start a program for a detailed determination of the relevant terms of the Higgs effective potential by computing the contribution of the b, t and T quarks at the one-loop level, as an starting point for higher-loops computation. In spite of the fact that some two-loop level contributions are well known to be important, we use our preliminary one-loop result to illustrate that, by demanding the effective potential to reproduce exactly the Standard Model Higgs potential, and in particular the relation m_H^2= 2 lambda v^2= 2 mu^2, it will be possible to set new constraints on the parameter space of the Littlest Higgs model when the computation of all the relevant contributions to the Higgs effective potential is completed.
Dobado Antonio
Penaranda Siannah
Tabares Lourdes
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