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Nobuchika Okada
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125 GeV Higgs Boson and Gauge-Higgs Unification
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In the context of a simple gauge-Higgs unification
scenario based on the gauge group SU(3) times
U(1)' in a 5-dimensional flat spacetime,
we investigate a possibility to realize the
Higgs boson mass of 125 GeV with a compactification
scale at the TeV. With the introduction of
(colored or uncolored) bulk fermions in a
certain representation under the gauge group
with a half-periodic boundary condition,
we analyze the one-loop RGE of the Higgs
quartic coupling with the gauge-Higgs condition
and successfully obtain 125 GeV Higgs boson
mass by adjusting a bulk mass for the fermions
with a fixed compactification scale. We also
investigate effects of the Kaluza-Klein modes
on the effective Higgs couplings with di-gluon,
di-photon and Z-photon and implications of
the Kaluza-Klein modes to Higgs boson phenomenology.
Colored Kaluza-Klein modes of the bulk fermions
can be discovered at the LHC run II with
13-14 TeV collider energy, and LHC phenomenology
for the colored Kaluza-Klein fermions is
discussed.
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