English

The electroweak gauge couplings in SO(5) x U(1) gauge-Higgs unification

High Energy Physics - Phenomenology 2014-11-20 v2

Abstract

The electroweak currents of quarks and leptons in the SO(5)×U(1)SO(5) \times U(1) gauge-Higgs unification model in the Randall-Sundrum warped space are determined. The 4D gauge couplings deviate from those in the standard model and the weak universality is slightly violated. It is shown that the model is free from 4D anomalies and the deviations of the gauge couplings are tiny, less than 1% except for the top quark. The ZtLtˉLZt_L \bar t_L, ZtRtˉRZt_R \bar t_R, ZbLbˉLZb_L \bar b_L and ZbRbˉRZb_R \bar b_R couplings deviate from those in the standard model by -7%, 18%, 0.3% and 0.9% with the warp factor zL=1015z_L = 10^{15}, respectively. The violation of the μ\mu-ee, τ\tau-ee and tt-ee universality in the charged current interactions is O(108){\cal O}(10^{-8}), O(106){\cal O}(10^{-6}) and 2.3%, respectively.

Keywords

Cite

@article{arxiv.0912.1173,
  title  = {The electroweak gauge couplings in SO(5) x U(1) gauge-Higgs unification},
  author = {Yutaka Hosotani and Shusaku Noda and Nobuhiro Uekusa},
  journal= {arXiv preprint arXiv:0912.1173},
  year   = {2014}
}

Comments

42 pages, 2 figures. Many comments and references are added