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String MSSM through flipped SU(5) from Z_{12} orbifold

Jihn E. Kim·Bumseok Kyae
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Abstract

In a $Z_{12-I}$ orbifold compactification through an intermediate flipped SU(5), the string MSSM (${\cal S}$MSSM) spectra (three families, one pair of Higgs doublets, and neutral singlets) are obtained with the Yukawa coupling structure. The GUT $\sin^2θ_W^0=\frac38$, even with exotics in the twisted sector, can be run to the observed electroweak scale value by mass parameters of vectorlike exotics near the GUT scale. We also obtain R-parity and doublet-triplet splitting.

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Jihn E. Kim, Bumseok Kyae. 2006-08-23. String MSSM through flipped SU(5) from Z_{12} orbifold. https://arxiv.org/abs/hep-th/0608085

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