Gauge Coupling Unification in the Standard Model

Details Gauge Coupling Unification in the Standard Model Gauge Coupling Unification in the Standard Model

2005-03-23

arxiv.org/abs/hep-ph/0503226v1

Phys.Lett.B624:233-238,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

RevTex4, 4 pages, 2 figures

Scientific paper

10.1016/j.physletb.2005.08.019

The string landscape suggests that the supersymmetry breaking scale can be high, and then the simplest low energy effective theory is the Standard Model (SM). We show that gauge coupling unification can be achieved at about 10^{16-17} GeV in the SM with suitable normalizations of the U(1)_Y. Assuming grand unification scale supersymmetry breaking, we predict that the Higgs mass range is 127 GeV to 165 GeV, with the precise value strongly correlated with the top quark mass and SU(3)_C gauge coupling. We also present 7-dimensional orbifold grand unified theories in which such normalizations for the U(1)_Y and charge quantization can be realized.

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