Electroweak symmetry breaking and radion stabilization in universal extra dimensions
arXiv:hep-ph/0403012 · doi:10.1088/1126-6708/2004/04/067
Abstract
We discuss the stabilization of the scalar sector, including the radion, in the gauge model with one universal extra dimension, within Higgs and Higgsless scenarios. The stabilization occurs at the one-loop level, through the fermionic contribution to the effective potential; in the Higgs case, for stabilization to take place the bosonic contribution must be balanced by the fermionic one, hence the scales of these two cannot differ too much. However, there is no need for (softly broken) supersymmetry to achieve the stabilization - it can be arranged for a reasonably wide range of couplings and mass scales. The primary instability in the model is the run-away of the radion vacuum expectation value. It turns out that the requirement of the radion stability, in the Higgs case, favours a Higgs boson mass below 0.26 TeV, which is consistent with the Standard Model upper bound that follows from the electroweak precision measurements. The typical radion mass is of the order of 10^{-6} eV. The radion mass can be made larger by rising the scale of fermion masses, as clearly seen in the Higgsless case. The cosmological constant may be cancelled by suitable counterterms, in such a way that the stabilization is not affected.
20 pages, 2 figures, references added
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Cited by in corpus (7)
- Discrimination of Supersymmetry and Universal Extra Dimensions at Hadron Colliders
- Precise Calculation of the Relic Density of Kaluza-Klein Dark Matter in Universal Extra Dimensions
- Search for Higgs bosons of the Universal Extra Dimensions at the Large Hadron Collider
- Phenomenology of Universal Extra Dimensions
- Gauge and Modulus Inflation from 5D Orbifold SUGRA
- Cosmological Constraints on Radion Evolution in the Universal Extra Dimension Model
- R-symmetries from higher dimensions