Abelian discrete symmetries Z_{N} and Z_{nR} from string orbifolds [PDF]
Jihn E. KimWe show that Abelian discrete symmetries Z_{N} and Z_{nR} from string orbifolds result by assigning vacuum expectation values(VEVs) only to specified singlets. These singlets obtaining VEVs carry the gauge charges (of the covering U(1) gauge group) as multiples of N for Z_N and n for Z_{nR}. We explicitly show this realization in a Z_{12-I} orbifold model.View original: http://arxiv.org/abs/1308.0344
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