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Title: Dynamical Gauge-Higgs Unification

Abstract

In the dynamical gauge-Higgs unification the 4D Higgs field is unified with gauge fields and the electroweak symmetry is dynamically broken by the Hosotani mechanism. Interesting phenomenology is obtained in the Randall-Sundrum warped spacetime. (i) The Higgs boson mass is predicted at the LHC energies. (ii) The hierarchy in the fermion mass spectrum is nally explained. (iii) Tiny violation of the universality in the charged current interactions is predicted. (iv) Yukawa couplings of quarks and leptons are suppressed compared with those in the standard model. (v) WWZ, WWH, ZZH couplings are suppressed compared with those in the standard model.

Authors:
 [1]
  1. Department of Physics, Osaka University, Toyonaka, Osaka 560-0043 (Japan)
Publication Date:
OSTI Identifier:
20900810
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 881; Journal Issue: 1; Conference: CICHEP II: Cairo international conference on high energy physics, Cairo (Egypt), 14-17 Jan 2006; Other Information: DOI: 10.1063/1.2435276; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CERN LHC; CHARGED-CURRENT INTERACTIONS; HIGGS BOSONS; HIGGS MODEL; LEPTONS; MASS; MASS SPECTRA; QUARKS; SPACE-TIME; STANDARD MODEL; SYMMETRY; SYMMETRY BREAKING

Citation Formats

Hosotani, Yutaka. Dynamical Gauge-Higgs Unification. United States: N. p., 2007. Web. doi:10.1063/1.2435276.
Hosotani, Yutaka. Dynamical Gauge-Higgs Unification. United States. doi:10.1063/1.2435276.
Hosotani, Yutaka. Fri . "Dynamical Gauge-Higgs Unification". United States. doi:10.1063/1.2435276.
@article{osti_20900810,
title = {Dynamical Gauge-Higgs Unification},
author = {Hosotani, Yutaka},
abstractNote = {In the dynamical gauge-Higgs unification the 4D Higgs field is unified with gauge fields and the electroweak symmetry is dynamically broken by the Hosotani mechanism. Interesting phenomenology is obtained in the Randall-Sundrum warped spacetime. (i) The Higgs boson mass is predicted at the LHC energies. (ii) The hierarchy in the fermion mass spectrum is nally explained. (iii) Tiny violation of the universality in the charged current interactions is predicted. (iv) Yukawa couplings of quarks and leptons are suppressed compared with those in the standard model. (v) WWZ, WWH, ZZH couplings are suppressed compared with those in the standard model.},
doi = {10.1063/1.2435276},
journal = {AIP Conference Proceedings},
number = 1,
volume = 881,
place = {United States},
year = {Fri Jan 12 00:00:00 EST 2007},
month = {Fri Jan 12 00:00:00 EST 2007}
}
  • An SO(5)xU(1) gauge-Higgs unification model in the Randall-Sundrum warped space with top and bottom quarks is constructed. Additional fermions on the Planck brane make exotic particles heavy by effectively changing boundary conditions of bulk fermions from those determined by orbifold conditions. Gauge couplings of a top quark multiplet trigger electroweak symmetry breaking by the Hosotani mechanism, simultaneously giving a top quark the observed mass. The bottom quark mass is generated by the combination of brane interactions and the Hosotani mechanism, where only one ratio of brane masses is relevant when the scale of brane masses is much larger than themore » Kaluza-Klein scale ({approx}1.5 TeV). The Higgs mass is predicted to be 49.9 (53.5) GeV for the warp factor 10{sup 15} (10{sup 17}). The Wilson line phase turns out (1/2){pi} and the Higgs couplings to W and Z vanish so that the LEP2 bound for the Higgs mass is evaded. In the flat spacetime limit the electroweak symmetry is unbroken.« less
  • No abstract prepared.
  • In this paper we increase the minimal supersymmetric standard model tree level Higgs mass bound to a value that is naturally larger than the LEP-II search constraint by adding to the superpotential a {lambda}SH{sub u}H{sub d} term, as in the next to minimal supersymmetric standard model, and UV completing with new strong dynamics before {lambda} becomes nonperturbative. Unlike other models of this type, the Higgs fields remain elementary, alleviating the supersymmetric fine-tuning problem while maintaining unification in a natural way.
  • We derive an useful formula by which the effective potential of the Higgs field is easily calculated in the gauge-Higgs unification scenario in the warped background. This scenario has many interesting features and attracts attentions in these days. One of the peculiar predictions is the relatively large Higgs mass. However, the effective potential of the Higgs field, which determines the Higgs mass, has not been investigated so much. The formula which we derive here will be helpful for this purpose. As an application, we investigate the gauge-Higgs condition that the effective theory of the gauge-Higgs unification model should satisfy.
  • We study an SU(2) supersymmetric gauge model in a framework of gauge-Higgs unification. Multi-Higgs spectrum appears in the model at low energy. We develop a useful perturbative approximation scheme for evaluating effective potential to study the multi-Higgs mass spectrum. We find that both tree-massless and massive Higgs scalars obtain mass corrections of similar size from finite parts of the loop effects. The corrections modify the multi-Higgs mass spectrum, and hence, the loop effects are significant in view of future verifications of the gauge-Higgs unification scenario in high-energy experiments.