220 research outputs found
Hosotani mechanism on the lattice
We explore the phase structure and symmetry breaking in four-dimensional
SU(3) gauge theory with one spatial compact dimension on the lattice in the
presence of fermions in the adjoint and fundamental representations with
general boundary conditions. The eigenvalue phases of Polyakov loops and the
associated susceptibility are measured on 16^3 x 4 lattice. We establish a
correspondence between the phases found on the lattice and the gauge symmetry
breaking by the Hosotani mechanism.Comment: 7 pages, 4 figures, prepared for the 31st International Symposium on
Lattice Field Theory - LATTICE 2013 Added preprint number
Distinct signals of the gauge-Higgs unification in collider experiments
Effects of Kaluza-Klein excited neutral vector bosons ( bosons) in the
gauge-Higgs unification on cross sections
are studied, particularly in future collider experiments with
polarized beams. Significant deviations in the energy and polarization
dependence in , the lepton forward-backward asymmetry,
and the left-right
asymmetry from the standard model are predicted.Comment: 16 pages, 5 figures, 7 tables (v3) numerical evaluations renewed,
comments and references added, 4 tables adde
Coupling Sum Rules and Oblique Corrections in Gauge-Higgs Unification
In GUT inspired gauge-Higgs unification
(GHU) in the Randall-Sundrum warped spacetime, the and couplings of all
4D fermion modes become nontrivial. The and couplings of zero-mode
quarks and leptons slightly deviate from those in the SM, and the couplings
take the matrix form in the space of Kaluza-Klein (KK) states. In particular,
the 4D couplings and mass spectra in the KK states depend on the Aharonov-Bohm
phase in the fifth dimension.
Nevertheless there emerge three astonishing sum rules among those coupling
matrices, which guarantees the finiteness of certain combinations of
corrections to vacuum polarization tensors. We confirm by numerical evaluation
that the equality in the sum rules holds with 5 to 7 digits accuracy. Based on
the sum rules we propose improved oblique parameters in GHU. Oblique
corrections due to fermion 1-loop diagrams are found to be small.Comment: 39 page
and Boson Pair Production at Electron-Positron Colliders in Gauge-Higgs Unification
We examine and boson pair production processes at electron-positron
collider experiments in the gauge-Higgs
unification (GHU) model. We find that the deviation of the total cross section
for the process from the Standard Model (SM) in the GHU
model with parameter sets, which are consistent with the current experiments,
is about 0.5% to 1.5% and 0.6% to 2.2% for GeV and 500GeV,
respectively, depending on the initial electron and positron polarization. We
find that for the process the deviation from the SM in the GHU
model is at most 1%. We find that unitality bound for the
process is satisfied in the GHU model as in the SM, as a consequence of the
relationship among coupling constants.Comment: 32 pages, 8 tables, 12 figures. arXiv admin note: substantial text
overlap with arXiv:2301.0783
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