Three family Z3 orbifold trinification, MSSM and doublet-triplet splitting problem

Kang Sin Choi, Jihn E. Kim

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26 Scopus citations


A Z3 orbifold compactification of E8 x E 8′ heterotic string is considered toward a trinification SU(3)3 with three light families. The GUT scale VEVs of the SU(2)W x U(1)Y x SU(3)c singlet chiral fields in two sets of the trinification spectrum allow an acceptable symmetry breaking pattern toward MSSM. We show that a doublet-triplet splitting is related to the absence of a ΔB nonzero operator.

Original languageEnglish
Pages (from-to)87-92
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
StatePublished - 7 Aug 2003

Bibliographical note

Funding Information:
We thank Kyuwan Hwang for a useful discussion. We also thank the Physikalisches Institut of the Universität Bonn for the hospitality extended to us during our visit when this work was initiated. This work is supported in part by the KOSEF Sundo Grant (2002), the BK21 program of Ministry of Education, and Korea Research Foundation Grant No. KRF-PBRG-2002-070-C00022.


  • Superstring
  • Three families
  • Trinification
  • Z orbifold


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