Anomalous Higgs Couplings in the SO(5)×U(1)_<B-L> Gauge-Higgs Unification in Warped Spacetime(Particles and Fields)
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概要
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The gauge couplings WWZ, WWWW, and WWZZ in the gauge-Higgs unification scenario in the Randall-Sundrum warped spacetime remain almost universal as in the standard model, but substantial deviation results for the Higgs couplings. In the SO(5)×U(1)_<B-L> model, the couplings WWH and ZZH are suppressed by a factor cosθ_H from the values in the standard model, while the bare couplings WWHH and ZZHH are suppressed by a factor 1-2/3sine^2θ_H. Here θ_H is the Yang-Mills AB phase (Wilson line phase) along the fifth dimension, which characterizes the electroweak symmetry breaking. The suppression can be used to test the gauge-Higgs unification scenario at LHC and ILC. It is also shown that the WWZ coupling in flat spacetime deviates from the standard model value at moderate values of θ_H, contradicting with the LEP2 data.
- 理論物理学刊行会の論文
- 2007-11-25
著者
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HOSOTANI Yutaka
Department of Physics, Osaka University
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Hosotani Yutaka
Osaka Univ. Toyonaka Jpn
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Hosotani Yutaka
Department Of Physics Osaka University
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Sakamura Yutaka
Department Of Physics Osaka University
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