# Gauge Symmetry Reduction from the Extra Space S1/Z2

@article{Kawamura1999GaugeSR, title={Gauge Symmetry Reduction from the Extra Space S1/Z2}, author={Yoshiharu Kawamura}, journal={Progress of Theoretical Physics}, year={1999}, volume={103}, pages={613-619} }

We study a mechanism of symmetry transition upon compactification of a 5-dimensional field theory on $S^1/Z_2$. The transition occurs unless all components in a multiplet of a symmetry group have a common $Z_2$ parity on $S^1/Z_2$. 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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