$ρ$ parameter constraints on radion phenomenology and a lower bound on Higgs mass

Details $ρ$ parameter constraints on radion phenomenology and a lower bound on Higgs mass $ρ$ parameter constraints on radion phenomenology and a lower bound on Higgs mass

2001-07-15

arxiv.org/abs/hep-ph/0107162v3

Phys.Lett. B528 (2002) 253-258

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, latex, 6 eps figures. Redone the calculation by using the cut-off regularisation technique

Scientific paper

10.1016/S0370-2693(02)01209-1

In this paper we determine the contribution of a light stabilized radion to the weak isospin violating $\rho$ parameter by using an ultraviolet momentum cut off as the regulator. The LEP1 bound on $\rho^{new}$ is then used to derive constraints on the radion mass $\mphi$ and its vev $\vphi$. Finally by using the beta function of the higgs self coupling we have determined a lower bound on the higgs mass from the rho parameter constraints on $\mphi$ and $\vphi$. Our results show that for $\mphi <$ 600 GeV the rho parameter bound on $m_h$ is stronger than the present direct bound from LEPII.

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