21-26 July 2014
Renold Building
Europe/London timezone
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LHC signals and dark matter in the SO(5)xU(1) gauge-Higgs unification

Presented by Prof. Yutaka HOSOTANI on 24 Jul 2014 from 14:50 to 15:10
Type: Alternative Theories
Track: Alternative Theories


Signatures of the SO(5) x U(1) gauge-Higgs unification at 14 TeV LHC are presented. The Kaluza-Klein (KK) mass spectra of $¥gamma, Z, Z_R$ and the Higgs self-couplings obey universality relations with the Aharonov-Bohm (AB) phase $¥theta_H$ in the fifth dimension. The current data at low energies and at LHC indicate $¥theta_H <0.2$. Three neutral gauge bosons, the first KK modes $Z_R^{(1)}$, $Z^{(1)}$, and $¥gamma^{(1)}$, appear as $Z'$ bosons in dilepton events at LHC. For $¥theta_H = 0.114$, the mass and decay width of $Z_R^{(1)}$, $Z^{(1)}$, and $¥gamma^{(1)}$ are (5.73¥,TeV, 482¥,GeV), (6.07¥,TeV, 342¥,GeV), and (6.08¥,TeV, 886¥,GeV), respectively. For $¥theta_H = 0.073$ their masses are 8.00¥,TeV$¥sim$8.61¥,TeV. An excess of events in the dilepton invariant mass should be observed in the $Z'$ search at the upgraded LHC at 14$¥,$TeV. Furthermore the neutral components of $n_F$ $SO(5)$-spinor fermions (dark fermions), relevant for having the observed unstable Higgs boson, become 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 observation. Refs: arXiv:1404.2748 [hep-ph] and one paper in preparation.


Location: Renold
Room: F1

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