Dark matter in the SO(5) x U(1) gauge-Higgs unification

Abstract

In the SO(5)×U (1) gauge-Higgs unification the lightest, neutral component of n F SO(5)-spinor fermions (dark fermions), which are relevant for having the observed unstable Higgs boson, becomes the dark matter of the universe. We show that the relic abundance of the dark matter determined by WMAP and Planck data is reproduced, below the bound placed by the direct detection experiment by LUX, by a model with one light and three heavier (n F = 4) dark fermions with the lightest one of a mass from 2.3 TeV to 3.1 TeV. The corresponding Aharonov-Bohm phase θ H in the fifth dimension ranges from 0.097 to 0.074. The case of n F = 3 (n F = 5, 6) dark fermions yields the relic abundance smaller (larger) than the observed limit.

LHC signals of the SO(5)×U(1) gauge-Higgs unification

“…If we assume conservation of the number of dark fermions, the dark fermions can become stable. In this scenario dark fermions are one of dark matter candidates [8]. Table 1.…”

GUT inspired SO(5)×U(1)×SU(3)

“…The Kaluza-Klein (KK) mass scale is about m KK ∼ 8 TeV for θ H ∼ 0.1. Implications of GHU to dark matter and Majorana neutrino masses are also under intensive study [17][18][19][20][21].…”

Forward–backward asymmetry in the gauge-Higgs unification at the International Linear Collider

“…Note that also the Yukawa interactions in the GHU models are the gauge interactions of the extra-dimensional component of the gauge boson and the fermions. The phenomenologically most well-studied GHU model is the SO(5) × U (1) GHU models [31,[41][42][43][44][45][46][47][48][49][50][51][52][53], which are defined on the warped metric [60].…”