Modulus stabilization and IR-brane kinetic terms in gauge-Higgs unification

Abstract

We discuss the modulus stabilization by the Casimir energy and various effects of IR-brane kinetic terms for the gauge fields in a gauge-Higgs unification model in the warped spacetime, where the Wilson line phase ${\theta }_H$ is determined as ${\theta }_H=\pi /2$. We find that the brane kinetic terms with O(1) coefficients are necessary for the modulus stabilization. On the other hand, large brane kinetic terms can deviate 4D gauge couplings from the standard model values and also cause too light Kaluza-Klein (KK) modes. In the parameter region that ensures the modulus stabilization, the KK gluon appears below 1 TeV, which marginally satisfies the experimental bound. The allowed parameter region will be enlarged in a model where a smaller value of ${\theta }_H$ is realized.

20 pages, 5 figures, typos corrected

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• H parity and the stable Higgs boson in the SO(5) x U(1) gauge-Higgs unification
• Warped Universal Extra Dimensions
• Collider signatures of the SO(5) x U(1) gauge-Higgs unification
• SUSY breaking scales in the gauge-Higgs unification
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• Radion stabilization in the presence of Wilson line phase
• Spectrum in the presence of brane-localized mass on torus extra dimensions
• On Taming the Warped Radion with Supersymmetry