Gauge Symmetry Reduction from the Extra Space S1/Z2
Abstract
We study a mechanism of symmetry transition upon compactification of a 5-dimensional field theory on S1/Z2. The transition occurs unless all components in a multiplet of a symmetry group have a common Z2 parity on S1/Z2. This mechanism is applied to a reduction of SU(5) gauge symmetry in grand unified theory, and phenomenological implications are discussed.
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